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Preoperative Preparation and Workup

  • Paul R. Kemmeter
  • Eric J. Krebill
Chapter

Abstract

Obesity rates continue to increase worldwide with an estimated 400 million adults being classified as obese and an estimated 300,000 yearly deaths attributable to complications of obesity such as heart disease, diabetes, and hypertension. Bariatric surgery remains the most efficacious treatment for obesity and its comorbidities. Over the past 15 years, surgery-associated morbidity and mortality rates have decreased substantially secondary to the development of dedicated bariatric surgery fellowships, centers of excellence, defined protocols and procedures, databases, and ongoing research. Attention to appropriate patient selection, preoperative workup, and preparation are essential to continue these trends. The purpose of this chapter is to share our group’s experience combined with that of the published literature in the preoperative process. Although we are aware that this process can seem lengthy and may result in a delay to surgery, our aim is to fulfill the essence of the Hippocratic Oath: first do no harm.

Keywords

Bariatric surgery preoperative assessment Bariatric surgery preparation Bariatric surgery workup Bariatric surgery evaluation Bariatric surgery risk management 

References

  1. 1.
    Karra E, Chandarana K, Batterham RL. The role of peptide YY in appetite regulation and obesity. J Physiol. 2009;587(pt 1):19–25.PubMedCrossRefPubMedCentralGoogle Scholar
  2. 2.
    Khan MA, Grinberg R, Johnson S, et al. Perioperative risk factors for 30-day mortality after bariatric surgery: is functional status important. Surg Endosc. 2013;27(5):1772–7.PubMedCrossRefPubMedCentralGoogle Scholar
  3. 3.
    Gastrointestinal surgery for severe obesity: National Institutes of Health consensus development conference statement. Am J Clin Nutr 1992;55(2 Suppl):615S–619S.Google Scholar
  4. 4.
    Gupta PK, Franck C, Miller WJ, et al. Development and validation of a bariatric surgery morbidity risk calculator using the prospective, multicenter NSQIP dataset. JACS. 2011;212(3):301–9.Google Scholar
  5. 5.
    Sanni A, Perez S, Medbery R, et al. Postoperative complications in bariatric surgery using age and BMI stratification: a study using ACS-NSQIP data. Surg Endosc. 2014;28:3302–9.PubMedCrossRefPubMedCentralGoogle Scholar
  6. 6.
    Stroh C, Weiner R, Wolff S, et al. Influences of gender on complication rate and outcome after roux-en-y gastric bypass: data analysis of more than 10,000 operations from the German Bariatric surgery Registry. Obes Surg. 2014;24:1625–33.PubMedCrossRefPubMedCentralGoogle Scholar
  7. 7.
    O’Keefe KL, Kemmeter PR, Kemmeter KD. Bariatric surgery outcomes in patients aged 65 years and older at an American Society for Metabolic and Bariatric Surgery Center of Excellence. Obes Surg. 2010;20(9):1199–205.PubMedCrossRefPubMedCentralGoogle Scholar
  8. 8.
    Nguyen NT, Karipineni F, Masoomi H. Increasing utilization of laparoscopic gastric banding in the adolescent: data from academic medical centers, 2002–2009. Am Surg. 2011;11:1510–4.Google Scholar
  9. 9.
    Fris RJ. Preoperative low energy diet diminishes liver size. Obes Surg. 2004;4(9):1165–70.CrossRefGoogle Scholar
  10. 10.
    Owers CE, Abbas Y, Ackroyd R, et al. Perioperative optimization of patients undergoing bariatric surgery. J Obes. 2012;2012:781546.PubMedPubMedCentralCrossRefGoogle Scholar
  11. 11.
    Lee WJ, Wang W, Chen TC, et al. Clinical significance of central obesity in laparoscopic bariatric surgery. Obes Surg. 2003;13(6):921–5.PubMedCrossRefPubMedCentralGoogle Scholar
  12. 12.
    Kartheuser AH, Leonard DF, Penninckx F, et al. Waist circumference and waist/hip ratio are better predictive risk factors for mortality and morbidity after colorectal surgery than body mass index and body surface area. Ann Surg. 2013;258(5):722–30.PubMedCrossRefPubMedCentralGoogle Scholar
  13. 13.
    Tymitz K, Kerlakian G, Engel A, et al. Gender differences in early outcomes following hand-assisted laparoscopic Roux-en-Y gastric bypass surgery: gender differences in bariatric surgery. Obes Surg. 2007;17:1588–91.PubMedCrossRefPubMedCentralGoogle Scholar
  14. 14.
    Edholm D, Kullberg J, Haenni A, et al. Preoperative 4-week low-calorie diet reduces liver volume and intrahepatic fat, and facilitates laparoscopic gastric bypass in morbidly obese. Obes Surg. 2011;21:345–50.PubMedCrossRefPubMedCentralGoogle Scholar
  15. 15.
    Coles SL, Dixon JB, Marks P, et al. Preoperative weight loss with a very-low-energy diet: quantitation of changes in liver and abdominal fat by serial imaging. Am J Clin Nutr. 2006;84:304–11.CrossRefGoogle Scholar
  16. 16.
    Liu RC, Sabnis AA, Forsyth C, et al. The effects of acute preoperative weight loss on laparoscopic Roux-en-Y gastric bypass. Obes Surg. 2005;15:1396–402.PubMedCrossRefPubMedCentralGoogle Scholar
  17. 17.
    Huerta S, Dredar S, Hayden E, et al. Preoperative weight loss decreases the operative time of gastric bypass at a Veterans Administration Hospital. Obes Surg. 2008;18:508–12.PubMedCrossRefPubMedCentralGoogle Scholar
  18. 18.
    Alami RS, Morton JM, Schuster R, et al. Is there a benefit to preoperative weight loss in gastric bypass patients? A prospective randomized trial. Surg Obes Relat Dis. 2007;3:141–6.PubMedCrossRefPubMedCentralGoogle Scholar
  19. 19.
    Benotti PN, Still CD, Wood GC, et al. Preoperative weight loss before bariatric surgery. Arch Surg. 2009;144:1150–5.PubMedPubMedCentralCrossRefGoogle Scholar
  20. 20.
    Edholm D, Kullberg J, Karlsson FA, et al. Changes in liver volume and body composition during 4 weeks of low calorie diet before laparoscopic gastric bypass. Surg Obes Relat Dis. 2015;11:602–6.PubMedCrossRefPubMedCentralGoogle Scholar
  21. 21.
    Sjöström L, Narbro K, Sjöström CD, et al. Effects of bariatric surgery on mortality in Swedish obese subjects. N Engl J Med. 2007;357(8):741–52.PubMedCrossRefPubMedCentralGoogle Scholar
  22. 22.
    Nandipati K, Lin E, Husain F, et al. Factors predicting the increased risk for return to the operating room in bariatric patients: a NSQIP database study. Surg Endosc. 2013;27(4):1172–7.PubMedCrossRefPubMedCentralGoogle Scholar
  23. 23.
    Turgeon NA, Perez S, Mondestin M, et al. The impact of renal function on outcomes of bariatric surgery. J Am Soc Nephrol. 2012;23(5):885–94.PubMedCrossRefPubMedCentralGoogle Scholar
  24. 24.
    Lancaster RT, Hutter MM. Bands and bypasses: 30-day morbidity and mortality of bariatric surgical procedures as assessed by prospective, multi-center, risk-adjusted ACS-NSQIP data. Surg Endosc. 2008;22(12):2554–63.PubMedCrossRefPubMedCentralGoogle Scholar
  25. 25.
    Adams TD, Gress RE, Smith SC, et al. Long-term mortality after gastric bypass surgery. N Engl J Med. 2007;357(8):753–61.PubMedPubMedCentralCrossRefGoogle Scholar
  26. 26.
    Davis MM, Slish K, Chao C, Cabana MD. National trends in bariatric surgery 1996–2002. Arch Surg. 2006;141(1):71–4. disc 75PubMedCrossRefPubMedCentralGoogle Scholar
  27. 27.
    Hutter MM, Randall S, Khuri SF, et al. Laparoscopic versus open gastric bypass for morbid obesity; a multicenter, prospective, risk-adjusted analysis from the National Surgical quality Improvement Program. Ann Surg. 2006;243(5):657–62. disc 662-6PubMedPubMedCentralCrossRefGoogle Scholar
  28. 28.
    Padwal RS, Pajewski NM, Allison DB, Sharma AM. Using the Edmonton obesity staging system to predict mortality in a population-representative cohort of people with overweight and obesity. CMAJ. 2011;183(14):E1059–66.PubMedPubMedCentralCrossRefGoogle Scholar
  29. 29.
    Duncan AE, Abd-Elsayed A, Maheshwari A, et al. Role of intraoperative and postoperative blood glucose concentrations in predicting outcomes after cardiac surgery. Anesthesiology. 2010;112(4):860–71.PubMedCrossRefPubMedCentralGoogle Scholar
  30. 30.
    Doenst T, Wijeysundera D, Karkouti K, et al. Hyperglycemia during cardiopulmonary bypass is an independent risk factor for mortality in patients undergoing cardiac surgery. J Thorac Cardiovasc Surg. 2005;130(4):1144–50.PubMedCrossRefGoogle Scholar
  31. 31.
    Chiappetta S, Stier C, Squillante S, et al. The importance of the Edmonton Obesity Staging System in predicting postoperative outcome and 30-day mortality after metabolic surgery. Surg Obes Relat Dis. 2016;12:1847–55.PubMedCrossRefGoogle Scholar
  32. 32.
    Clinical Practice Guidelines for the Perioperative Nutritional, Metabolic, and Nonsurgical Support of the Bariatric Surgery Patient. Published. 2013. Last accessed 4/30/17. https://asmbs.org/resources/clinical-practice-guidelines-for-the-perioperative-nutritional-metabolic-and-nonsurgical-support-of-the-bariatric-surgery-patient.
  33. 33.
    Rothen HU, Sporre B, Engberg G, et al. Airway closure, atelectasis and gas exchange during general anaesthesia. Br J Anaesth. 1998;81:681–6.PubMedCrossRefGoogle Scholar
  34. 34.
    Wightman JA. A prospective survey of the incidence of postoperative pulmonary complications. Br J Surg. 1968;55:85–91.PubMedCrossRefGoogle Scholar
  35. 35.
    Lawrence VA, Dhanda R, Helsenbeck SG, et al. Risk of pulmonary complications after elective abdominal surgery. Chest. 1996;110:744–50.PubMedCrossRefGoogle Scholar
  36. 36.
    Pasulka PS, Bistrian BR, Benotti PN, et al. The risks of surgery in obese patients. Ann Intern Med. 1986;104:540–6.PubMedCrossRefGoogle Scholar
  37. 37.
    Wei YF, Wu HD. Candidates for bariatric surgery; morbidly obese patients with pulmonary dysfunction. J Obes. 2012;1:1–6.CrossRefGoogle Scholar
  38. 38.
    O’Keeffe T, Patterson EJ. Evidence supporting routine polysomnography before bariatric surgery. Obes Surg. 2004;14(1):23–6.PubMedCrossRefGoogle Scholar
  39. 39.
    Lopez PP, Stefan B, Schulman CI, Byers PM. Prevalence of sleep apnea in morbidly obese patients who presented for weight loss surgery evaluation: more evidence for routine screening for obstructive sleep apnea before weight loss surgery. Am Surg. 2008;74(9):834–8.PubMedGoogle Scholar
  40. 40.
    Aguiar IC, Freita WR Jr, Santos IR, et al. Obstructive sleep apnea and pulmonary function in patients with severe obesity before and after bariatric surgery: a randomized clinical trial. Multidiscip Respir Med. 2014;9:43–51.PubMedPubMedCentralCrossRefGoogle Scholar
  41. 41.
    De Menezes Duarte RL, Magalhaes-da-Silveira FJ. Factors predictive of obstructive sleep apnea in patients undergoing pre-operative evaluation for bariatric surgery and referred to a sleep laboratory for polysomnography. J Bras Pneumol. 2015;41(5):440–8.CrossRefGoogle Scholar
  42. 42.
    Farinholt GN, Carr AD, Chang EJ, Ali MR. A call to arms: obese men with more severe comorbid disease and underutilization of bariatric operations. Surg Endosc. 2013;27(12):4556–63.PubMedCrossRefPubMedCentralGoogle Scholar
  43. 43.
    Ravesloot MJ, Van Maanen JP, Hilgevoord AA, et al. Obstructive sleep apnea is underrecognized and underdiagnosed in patients undergoing bariatric surgery. Eur Arch Otorhinolaryngol. 2012;269(7):1865–71.PubMedPubMedCentralCrossRefGoogle Scholar
  44. 44.
    Daltro C, Gregorio PB, Alves E, et al. Prevalence and severity of sleep apnea in a group of morbidly obese patients. Obes Surg. 2007;17(6):809–14.PubMedCrossRefPubMedCentralGoogle Scholar
  45. 45.
    Sareli AE, Cantor CR, Williams NN, et al. Obstructive sleep apnea in patients undergoing bariatric surgery- a tertiary center experience. Obes Surg. 2011;23(3):316–27.CrossRefGoogle Scholar
  46. 46.
    Lee YH, Johan A, Wong KK, et al. Prevalence and risk factors for obstructive sleep apnea in a multiethnic population of patients presenting for bariatric surgery in Singapore. Sleep Med. 2009;10(2):226–32.PubMedCrossRefPubMedCentralGoogle Scholar
  47. 47.
    El-Sayed IH. Comparison of four sleep questionnaires for screening obstructive sleep apnea. Egypt J Chest Dis Tuberc. 2012;61(4):433–41.CrossRefGoogle Scholar
  48. 48.
    MeChanick JI, Youdim A, Jones DB, et al. Bariatric surgery clinical practice guidelines. Endocr Pract. 2013;19:337–72.PubMedPubMedCentralCrossRefGoogle Scholar
  49. 49.
    Qaseem A. Risk assessment for and strategies to reduce perioperative pulmonary complications for patients undergoing non-cardiothoracic surgery: a guideline from the American College of Physicians. Ann Inter Med. 2006;144:575–80.CrossRefGoogle Scholar
  50. 50.
    Clavellina-Gaytan D, Velazquez-Fernandez D, Del-Villar E, et al. Evaluation of spirometric testing as a routine preoperative assessment in patients undergoing bariatric surgery. Obes Surg. 2015;25:530–6.PubMedCrossRefPubMedCentralGoogle Scholar
  51. 51.
    Poelaert J, Szegedi L, Blot S, et al. Prevention of postoperative pulmonary problems starts intraoperatively. In: Annual updates in intensive care and emergency medicine. 2013. p. 539–52.Google Scholar
  52. 52.
    Kelkar KV. Post-operative pulmonary complications after non-cardiothoracic surgery. Indian J Anaesth. 2015;59(9):599–605.PubMedPubMedCentralCrossRefGoogle Scholar
  53. 53.
    Fonseca-Junior SJ, Sá CGADB, Rodrigues PAF, et al. Physical exercise and morbid obesity: a systematic review. Arq Bras Cir Dig. 2013;26:67–73.PubMedCrossRefPubMedCentralGoogle Scholar
  54. 54.
    Wrzesinski A, Correia JM, Fernandes TMB, et al. Complications requiring hospital management after bariatric surgery. Arq Bras Cir Dig. 2015;28:3–6.PubMedCrossRefPubMedCentralGoogle Scholar
  55. 55.
    Bartlett RH, Brennan ML, Gazzaniga AB, Hanson EL. Studies on the pathogenesis and prevention of postoperative pulmonary complications. Surg Gynecol Obstet. 1973;137(6):925–33.PubMedPubMedCentralGoogle Scholar
  56. 56.
    Veloso APLR, Cusmanich KG. Evaluation of the thoracoabdominal mobility of obese subjects in pre-bariatric surgery. Arq Bras Cir Dig. 2016;29(Sup. 1):39–42.PubMedCentralCrossRefGoogle Scholar
  57. 57.
    Thomas JA, McIntosh JM. Are incentive spirometry, intermittent positive pressure breathing, and deep breathing exercises effective in the prevention of postoperative pulmonary complications after upper abdominal surgery? A systematic overview and meta-analysis. Phys Ther. 1994;74(1):3.PubMedCrossRefPubMedCentralGoogle Scholar
  58. 58.
    Must A, Spadano J, Coakley EH, et al. The disease burden associated with overweight and obesity. JAMA. 1999;282(16):1523–9.PubMedCrossRefPubMedCentralGoogle Scholar
  59. 59.
    Klein S, Burke LE, Bray GA, et al. American Heart Association Council on Nutrition, Physical Activity, and Metabolism. Clinical implications of obesity with specific focus on cardiovascular disease: a statement for professionals from the American Heart Association Council on Nutrition, Physical Activity, and Metabolism: endorsed by the American College of Cardiology Foundation. Circulation. 2004;110(18):2952–67.PubMedCrossRefPubMedCentralGoogle Scholar
  60. 60.
    Omalu BI, Ives DG, Buhari AM, et al. Death rates and causes of death after bariatric surgery for Pennsylvania residents, 1995 to 2004. Arch Surg. 2007;142(10):923–8. disc 929PubMedCrossRefPubMedCentralGoogle Scholar
  61. 61.
    Mechanick JI, Youdim A, Jones DB, et al. American Association of Clinical Endocrinologists; Obesity Society; American Society for Metabolic & Bariatric Surgery (2013) Clinical practice guidelines for the perioperative nutritional, metabolic, and nonsurgical support of the bariatric surgery patient – 2013 update: cosponsored by American Association of Clinical Endocrinologists, The Obesity Society, and American Society for Metabolic & Bariatric Surgery. Obesity. 2013;21:S1–27.PubMedCrossRefPubMedCentralGoogle Scholar
  62. 62.
    Feely MA, Collins CS, Daniels PR, et al. Preoperative testing before noncardiac surgery: guidelines and recommendations. Am Fam Physician. 2013;87(6):414–8.PubMedPubMedCentralGoogle Scholar
  63. 63.
    Michalopoulou T, Aponte EM, Ruiz-Majoral A, et al. Role of echocardiography in bariatric surgery: preoperative assessment of non-cardiopathic morbidly obese patients. J Anaesth Clin Res. 2015;6:493.Google Scholar
  64. 64.
    Hall ME, do Carmo JM, da Silva AA, et al. Obesity, hypertension, and chronic kidney diseas. Int J Nephrol Renov Dis. 2014;7:75–88.CrossRefGoogle Scholar
  65. 65.
    Hall JE, Henegar JR, Dwyer TM, et al. Is obesity a major cause of chronic renal disease? Adv Ren Replace Ther. 2004;11(1):41–54.PubMedCrossRefPubMedCentralGoogle Scholar
  66. 66.
    Gomez P, Ruilope LM, Barrios V, et al. FATH Study Group Prevalence of renal insufficiency in individuals with hypertension and obesity/overweight: the FATH study. J Am Soc Nephrol. 2006;17(12 Suppl 3):S194–200.PubMedCrossRefPubMedCentralGoogle Scholar
  67. 67.
    Fenske WK, Dubb S, Bueter M, et al. Effect of bariatric surgery-induced weight loss on renal and systemic inflammation and blood pressure: a 12-month prospective study. Surg Obes Relat Dis. 2013;9(4):559–68.PubMedCrossRefPubMedCentralGoogle Scholar
  68. 68.
    Matlaga BR, Shore AD, Magnuson T, et al. Effect of gastric bypass surgery on kidney stone disease. J Urol. 2009;181(6):2573–7.PubMedCrossRefPubMedCentralGoogle Scholar
  69. 69.
    Sutherland V, Kuwada T, Gersin K, et al. Impact of bariatric surgery on hiatal hernia repair outcomes. Am Surg. 2016;82(8):743–7.PubMedPubMedCentralGoogle Scholar
  70. 70.
    Che F, Nguyen B, Cohen A, Nguyen NT. Prevalence of hiatal hernia in the morbidly obese. Surg Obes Relat Dis. 2013;9(6):920–4.PubMedCrossRefPubMedCentralGoogle Scholar
  71. 71.
    Erim T, Cruz-Correa MR, Szomstein S, et al. Prevalence of Helicobacter pylori seropositivity among patients undergoing bariatric surgery: a preliminary study. World J Surg. 2008;32:2021–5.PubMedCrossRefPubMedCentralGoogle Scholar
  72. 72.
    Kuper MA, Kratt T, Kramer KM, et al. Effort, safety, and finding of routine preoperative endoscopic evaluation of morbidly obese patients undergoing bariatric surgery. Surg Endosc. 2010;28(8):1996–2001.CrossRefGoogle Scholar
  73. 73.
    ASGE, SAGES, ASMBS Guideline. The role of endoscopy in the bariatric patient. GI Endo. 2015;81(5):1063–72.Google Scholar
  74. 74.
    Ng JY, Cheng AKS, Kim G, et al. Is elective gastroscopy prior to bariatric surgery in an Asian cohort worthwhile? Obes Surg. 2016;26(9):2156–60.PubMedCrossRefPubMedCentralGoogle Scholar
  75. 75.
    Wolter S, Duprée A, Miro J, et al. Upper gastrointestinal endoscopy prior to bariatric surgery-mandatory or expendable? An analysis of 801 cases. Obes Surg. 27:1938–43. Published online: 27 Feb 2017Google Scholar
  76. 76.
    Goitein D, Sakran N, Rayman S, et al. Barium swallow for hiatal hernia detection is unnecessary prior to primary sleeve gastrectomy. Surg Obes Relat Dis. 2017;13:138–43.PubMedCrossRefPubMedCentralGoogle Scholar
  77. 77.
    Schirmer B, Erenoglu C, Miller A. Flexible endoscopy in the management of patients undergoing Roux-en-Y gastric bypass. Obes Surg. 2002;12:634–8.PubMedCrossRefPubMedCentralGoogle Scholar
  78. 78.
    Madan AK, Speck KE, Hiler ML. Routine preoperative upper endoscopy for laparoscopic gastric bypass: is it necessary? Am Surg. 2004;70:684–6.PubMedPubMedCentralGoogle Scholar
  79. 79.
    Muñoz R, Ibáñez L, Salinas J, et al. Importance of routine preoperative upper GI endoscopy: why all patients should be evaluated? Obes Surg. 2009;19:427–31.PubMedCrossRefPubMedCentralGoogle Scholar
  80. 80.
    Goudra B, Nuzat A, Singh PM, et al. Association between type of sedation and the adverse events associated with gastrointestinal endoscopy: an analysis of 5 years’ data from a tertiary center in the USA. Clin Endosc. 2017;50(2):161–9.PubMedCrossRefPubMedCentralGoogle Scholar
  81. 81.
    Chalasani N, Younossi Z, Lavine JE, et al. The diagnosis and management of non-alcoholic fatty liver disease: practice guideline by the American Association for the Study of Liver Diseases, American College of Gastroenterology, and the American Gastroenterological Association. Hepatology. 2012;55(6):2005–23.PubMedCrossRefPubMedCentralGoogle Scholar
  82. 82.
    Bellentani S, Scaglioni F, Marino M, Bedogni G. Epidemiology of non-alcoholic fatty liver disease. Dig Dis. 2010;28(1):155–61.PubMedCrossRefPubMedCentralGoogle Scholar
  83. 83.
    Reha JL, Lee S, Hofmann LJ. Prevalence and predictors of nonalcoholic steatohepatitis in obese patients undergoing bariatric surgery: a Department of Defense experience. Am Surg. 2014;80(6):595–9.PubMedPubMedCentralGoogle Scholar
  84. 84.
    Fassio E, Alvarez E, Domı’nguez N, Landeira G, Longo C. Natural history of nonalcoholic steatohepatitis: a longitudinal study of repeat liver biopsies. Hepatology. 2004;40:820–6.PubMedPubMedCentralGoogle Scholar
  85. 85.
    Sorrentino P, Tarantino G, Conca P, et al. Silent non-alcoholic fatty liver disease-a clinical-histological study. J Hepatol. 2004;41:751–7.PubMedCrossRefPubMedCentralGoogle Scholar
  86. 86.
    Dixon JB, Bhathal PS, Hughes NR, O’Brien PE. Nonalcoholic fatty liver disease: improvement in liver histological analysis with weight loss. Hepatology. 2004;39(6):1647–54.PubMedCrossRefPubMedCentralGoogle Scholar
  87. 87.
    Alizai PH, Wendl J, Roeth AA, et al. Functional liver recovery after bariatric surgery – a prospective cohort study with the LiMAx test. Obes Surg. 2015;25(11):2047–53.PubMedCrossRefPubMedCentralGoogle Scholar
  88. 88.
    Silverman EM, Sapala JA, Appelman HD. Regression of hepatic steatosis in morbidly obese persons after gastric bypass. Am J Clin Pathol. 1995;104:23–31.PubMedCrossRefPubMedCentralGoogle Scholar
  89. 89.
    Chavez-Tapia NC, Tellez-Avila FI, Barrientos-Gutierrez T, et al. Bariatric surgery for non-alcoholic steatohepatitis in obese patients. Cochrane Database Syst Rev. 2010;1:CD007340.Google Scholar
  90. 90.
    Brolin RE, Bradley LJ, Taliwal RV. Unsuspected cirrhosis discovered during elective obesity operations. Arch Surg. 1998;113:84–8.CrossRefGoogle Scholar
  91. 91.
    Jan A, Narwaria M, Mahawar K. A systematic review of bariatric surgery in patients with liver cirrhosis. Obes Surg. 2015;25(8):1518–26.PubMedCrossRefPubMedCentralGoogle Scholar
  92. 92.
    D’Albuquerque LAC, Gonzalez AD, Wahle RC, et al. Liver transplantation for subacute hepatocellular failure due to massive steatohepatitis after bariatric surgery. Liver Transpl. 2008;14:881–5.PubMedCrossRefPubMedCentralGoogle Scholar
  93. 93.
    Dawes AJ, Maggard-Gibbons M, Maher AR, et al. Mental health conditions among patients seeking and undergoing bariatric surgery: a meta-analysis. JAMA. 2016;315(2):150–63.PubMedCrossRefPubMedCentralGoogle Scholar
  94. 94.
    Kessler RC, Chiu WT, Demler O, et al. Prevalence, severity, and comorbidity of 12-month DSM-IV disorders in the National Comorbidity Survey Replication. Arch Gen Psychiatry. 2005;62(6):617–27.Google Scholar
  95. 95.
    Lemont D, Moorehead MK, Parish MS, et al. Suggestions for the pre-surgical psychological assessment of bariatric surgery candidates: American Society for Bariatric Surgery. 2004. https://asmbs.org/wp/uploads/2014/05/psychpresurgicalassessment.pdf.
  96. 96.
    Beauchowitz A, Gonder-Frederick LA, Olbrisch ME, et al. Psychosocial evaluation of bariatric surgery candidates; a survey of present practices. Psychosom Med. 2005;65(5):825–32.CrossRefGoogle Scholar
  97. 97.
    Santry HP, Chin MH, Cagney KA, et al. The use of multidisciplinary teams to evaluate bariatric surgery patients: results from a national survey in the U.S.A. Obes Surg. 2006;16(1):59–66.PubMedCrossRefPubMedCentralGoogle Scholar
  98. 98.
    Batayyah E, Sharma G, Aminian A, et al. The role of the multidisciplinary conference in the evaluation of bariatric surgery candidates with a high-risk psychiatric profile. Bariatric Surg Pract Patient Care. 2015;10(4):156–9.CrossRefGoogle Scholar
  99. 99.
    Livhits M, Mercado C, Yermilov I, et al. Preoperative predictors of weight loss following bariatric surgery: systematic review. Obes Surg. 2012;22(1):70–89.PubMedCrossRefPubMedCentralGoogle Scholar
  100. 100.
    Buchwald H, Estok R, Fahrbach K, et al. Weight and type 2 diabetes after bariatric surgery: systematic review and meta-analysis. Am J Med. 2009;122(3):248–56.PubMedCrossRefPubMedCentralGoogle Scholar
  101. 101.
    Christou NV, Lieverman M, Sampalis F, Sampalis JS. Bariatric surgery reduces cancer risk in morbidly obese patients. Surg Obes Relat Dis. 2008;4(6):691–5.PubMedCrossRefPubMedCentralGoogle Scholar
  102. 102.
    Kokkinos A, Alexiadou K, Liasko C, et al. Improvement in cardiovascular indices after Roux-en-Y gastric bypass or sleeve gastrectomy for morbid obesity. Obes Surg. 2013;23(1):31–8.PubMedCrossRefPubMedCentralGoogle Scholar
  103. 103.
    Maggard-Gibbons M, Maglione M, Livhits M, et al. Bariatric surgery for weight loss and glycemic control in nonmorbidly obese adults with diabetes: a systematic review. JAMA. 2013;309(21):2250–61.PubMedCrossRefPubMedCentralGoogle Scholar
  104. 104.
    Wali A, Ashrafian H, Schofield KL, et al. Is social deprivation associated with weight loss outcomes following bariatric surgery? A 10-year single institutional experience. Obes Surg. 2014;24(12):2126–32.CrossRefGoogle Scholar
  105. 105.
    Fysekidis M, Catheline JM, Kouacou N, et al. Socioeconomic deprivation remains a significant barrier in the choice of bariatric surgery even when full medical expense coverage is present. Surg Obes Relat Dis. 2016;12:1403–9.PubMedCrossRefPubMedCentralGoogle Scholar
  106. 106.
    Diamant A, Cleghorn MC, Milner J, et al. Patient operational factors affecting wait times in a bariatric surgery program in Toronto: a retrospective cohort study. CMAJ Open. 2015;3(3):E331–7.PubMedPubMedCentralCrossRefGoogle Scholar
  107. 107.
    Furlong C. Smoking cessation and its effects on outcomes of surgical interventions. London Health Observatory and Barnet PCT. 2005. www.LHO.org.uk.
  108. 108.
    Krueger JK, Rohrich RJ. Clearing the smoke: the scientific rationale for tobacco abstention with plastic surgery. Plast Reconstr Surg. 2001;108(4):1063–73.PubMedCrossRefPubMedCentralGoogle Scholar
  109. 109.
    Rejali M, Rejali AR, Zhang L, et al. Effects of nicotine on the cardiovascular system. Vasc Dis Prev. 2005;2:135–44.CrossRefGoogle Scholar
  110. 110.
    Ngaage DL, Martins E, Orkell E, et al. The impact of the duration of mechanical ventilation on the respiratory outcome in smokers undergoing cardiac surgery. Cardiovasc Surg. 2002;10(4):345–50.PubMedCrossRefPubMedCentralGoogle Scholar
  111. 111.
    Warner DO. Preoperative smoking cessation: the role of the primary care provider. Mayo Clin Proc. 2005;80:252–8.PubMedCrossRefPubMedCentralGoogle Scholar
  112. 112.
    Cole CW, Hill GB, Farzad E, et al. Cigarette smoking and peripheral arterial occlusive disease. Surgery. 1993;114(4):753–7.PubMedPubMedCentralGoogle Scholar
  113. 113.
    Zhang W, Mason EE, Renquist KE, et al. Factors influencing survival following surgical treatment of obesity. Obes Surg. 2005;15(1):43–50.PubMedCrossRefPubMedCentralGoogle Scholar
  114. 114.
    Gonzalez R, Haines K, Nelson L, et al. Predictive factors of thromboembolic events in patients undergoing Roux-en-Y gastric bypass. Surg Obes Relat Dis. 2006;2(1):30–5. disc 35–6PubMedCrossRefPubMedCentralGoogle Scholar
  115. 115.
    Steele K, Schweitzer M, Prokopowicz G, et al. The long-term risk of venous thromboembolism following bariatric surgery. Obes Surg. 2011;21(9):1371–6.PubMedCrossRefPubMedCentralGoogle Scholar
  116. 116.
    Blackburn GL, Hutter MM, Harvey AM, et al. Expert panel on weight loss surgery: executive report update. Obesity. 2009;17(5):842–62.PubMedCrossRefPubMedCentralGoogle Scholar
  117. 117.
    Leggett T. United Nations Office on Drugs and Crime A review of the world cannabis situation. Bull Narc. 2006;58(1–2):1–155.PubMedPubMedCentralGoogle Scholar
  118. 118.
    Sarafian TA, Habib N, Oldham M, et al. Inhaled marijuana smoke disrupts mitochondrial energetics in pulmonary epithelial cells in vivo. Am J Physiol Lung Cell Mol Physiol. 2006;290(6):L1202–9.PubMedCrossRefPubMedCentralGoogle Scholar
  119. 119.
    Ware MA, Wang T, Shapiro S, et al. Smoked cannabis for chronic neuropathic pain: a randomized controlled trial. CMAJ. 2010;182(14):E694–701.PubMedPubMedCentralCrossRefGoogle Scholar
  120. 120.
    Mittleman MA, Lewis RA, Maclure M, et al. Triggering myocardial infarction by marijuana. Circulation. 2001;103(23):2805–9.PubMedCrossRefPubMedCentralGoogle Scholar
  121. 121.
    Wang X, Derakhshandeh R, Liu J, et al. One minute of marijuana secondhand smoke exposure substantially impairs vascular endothelial function. JAHA. 2016;5:1–10.Google Scholar
  122. 122.
    Grant I, Atkinson JH, Gouaux B, Wilsey B. Medical marijuana: clearing away the smoke. Neurol J. 2012;6:18–25.Google Scholar
  123. 123.
    Pertwee RG. Cannabinoids and multiple sclerosis. Mol Neurobiol. 2007;36(1):45–59.PubMedCrossRefPubMedCentralGoogle Scholar
  124. 124.
    Suzuki J, Haimovici F, Chang G. Alcohol use disorders after bariatric surgery. Obes Surg. 2012;22(2):201–7.PubMedCrossRefPubMedCentralGoogle Scholar
  125. 125.
    Spadola CE, Wagner EF, Dillon FR, et al. Alcohol and drug use among postoperative bariatric patients: a systematic review of the emerging research and its implications. Alcohol Clin Exp Res. 2015;39(9):1582–601.PubMedPubMedCentralCrossRefGoogle Scholar
  126. 126.
    Clark MM, Balsiger BM, Sletten CD, et al. Psychosocial factors and 2-year outcome following bariatric surgery for weight loss. Obes Surg. 2003;13(5):739–45.PubMedCrossRefPubMedCentralGoogle Scholar
  127. 127.
    Handelsman Y, Mechanick JI, Blonde L, et al. American Association of Clinical Endocrinologists Medical Guidelines for Clinical Practice for developing a diabetes mellitus comprehensive care plan. Endocr Pract. 2011;17(Suppl 2):1–52.PubMedCrossRefPubMedCentralGoogle Scholar
  128. 128.
    Hall TC, Pellen MGC, Sedman PC, et al. Preoperative factors predicting remission of type 2 diabetes mellitus after Roux-en-Y gastric bypass surgery for obesity. Obes Surg. 2010;20:1245–50.PubMedCrossRefPubMedCentralGoogle Scholar
  129. 129.
    Perna M, Romagnuolo J, Morgan K, et al. Preoperative hemoglobin A1c and postoperative glucose control in outcomes after gastric bypass for obesity. Surg Obes Relat Dis. 2012;6:686–90.Google Scholar
  130. 130.
    Lee W-J, Chong K, Ser K-H, et al. C-peptide predicts the remission of type 2 diabetes after bariatric surgery. Obes Surg. 2012;2:293–8.CrossRefGoogle Scholar
  131. 131.
    Moulin de Moraes CM, Mancini MC, Edna de Melo M, et al. Prevalence of subclinical hypothyroidism in a morbidly obese population and improvement after weight loss induced by Roux- en-Y gastric bypass. Obes Surg. 2005;15:1287–91.PubMedCrossRefPubMedCentralGoogle Scholar
  132. 132.
    Raftopoulos Y, Gagne DJ, Papasavas P, et al. Improvement of hypothyroidism after laparoscopic Roux-en-Y gastric bypass for morbid obesity. Obes Surg. 2004;14:509–13.PubMedCrossRefPubMedCentralGoogle Scholar
  133. 133.
    Chikunguwo S, Brethauer S, Nirujogi V, et al. Influence of obesity and surgical weight loss on thyroid hormone levels. Surg Obes Relat Dis. 2007;3:631–6.PubMedCrossRefPubMedCentralGoogle Scholar
  134. 134.
    Fierabracci P, Pinchera A, Marinelli S, et al. Prevalence of endocrine diseases in morbidly obese patients scheduled for bariatric surgery: beyond diabetes. Obes Surg. 2011;21:54–60.PubMedCrossRefPubMedCentralGoogle Scholar
  135. 135.
    Jankovic D, Wolf P, Anderwald C-H, et al. Prevalence of endocrine disorders in morbidly obese patients and the effects of bariatric surgery on endocrine and metabolic parameters. Obes Surg. 2012;22:62–9.PubMedCrossRefPubMedCentralGoogle Scholar
  136. 136.
    Garber J, Cobin RH, Gharib H, et al. Clinical practice guidelines for hypothyroidism in adults: cosponsored by American Association of Clinical Endocrinologists and the American Thyroid Association. Endocr Pract. 2012;11:1–207.Google Scholar
  137. 137.
    Perna M, Baker M, Byrne TK, et al. Statins and the bariatric patient: characterization and perioperative effects of statin therapy in the gastric bypass patient. Am Surg. 2011;77:44–7.PubMedPubMedCentralGoogle Scholar
  138. 138.
    American College of Obstetricians and Gynecologists. ACOG practice bulletin no.105: bariatric surgery and pregnancy. Obstet Gynecol. 2009;113:1405–13.CrossRefGoogle Scholar
  139. 139.
    Kominiarek MA. Pregnancy after bariatric surgery. Obstet Gynecol Clin N Am. 2010;37:305–20.CrossRefGoogle Scholar
  140. 140.
    Magdaleno R, Pereira BG, Chaim EA, et al. Pregnancy after bariatric surgery: a current view of maternal, obstetrical and perinatal challenges. Arch Gynecol Obstet. 2012;285:559–66.PubMedCrossRefPubMedCentralGoogle Scholar
  141. 141.
    Ponsky TA, Brody F, Pucci E. Alterations in gastrointestinal physiology after Roux-en-Y gastric bypass. J Am Coll Surg. 2005;201:125–31.PubMedCrossRefPubMedCentralGoogle Scholar
  142. 142.
    Bauman WA, Shaw S, Jayatilleke K, et al. Increased intake of calcium reverses: the B-12 malabsorption induced by metformin. Diabetes Care. 2000;23:1227–31.PubMedCrossRefPubMedCentralGoogle Scholar
  143. 143.
    Smith CD, Herkes SB, Behrns KE, et al. Gastric acid secretion and vitamin B-12 absorption after vertical Roux-en-Y gastric bypass for morbid obesity. Ann Surg. 1993;218:91–6.PubMedPubMedCentralCrossRefGoogle Scholar
  144. 144.
    Brolin RE, Gorman JH, Gorman RC, et al. Are vitamin B-12 and folate deficiency clinically important after Roux-en-Y gastric bypass? J Gastrointest Surg. 1998;2:436–42.PubMedCrossRefPubMedCentralGoogle Scholar
  145. 145.
    Rhode BM, Tamim H, Gilfix MB. Treatment of vitamin B-12 deficiency after gastric bypass surgery for severe obesity. Obes Surg. 1995;5:154–8.PubMedCrossRefPubMedCentralGoogle Scholar
  146. 146.
    Boylan LM, Sugerman HJ, Driskell JA. Vitamin E, vitamin B-6, vitamin B-12, and folate status of gastric bypass surgery patients. J Am Diet Assoc. 1988;88:579–85.PubMedPubMedCentralGoogle Scholar
  147. 147.
    Brolin RE, Gorman RC, Milgrim LM, Kenler HA. Multivitamin prophylaxis in prevention of post-gastric bypass vitamin and mineral deficiencies. Int J Obes. 1991;15:661–7.PubMedPubMedCentralGoogle Scholar
  148. 148.
    Flancbaum L, Belsley S, Drake V, et al. Preoperative nutritional status of patients undergoing Roux-en-Y gastric bypass for morbid obesity. J Gastrointest Surg. 2006;10:1033–7.PubMedCrossRefPubMedCentralGoogle Scholar
  149. 149.
    Wood RJ, Ronnenberg AG. Iron. In: Shils ME, Shike M, Ross AC, Caballero B, Cousins RJ, editors. Modern nutrition in health and disease. 10th ed. Philadelphia: Lippincott Williams & Wilkins; 2006.Google Scholar
  150. 150.
    Aills L, Blankenship J, Buffington C, et al. ASMBS allied health nutritional guidelines for the surgical weight loss patient. Surg Obes Relat Dis. 2008;4:S73–S108.PubMedCrossRefPubMedCentralGoogle Scholar
  151. 151.
    Buffington CK, Walker B, Cowan GS, et al. Vitamin D deficiency in the morbidly obese. Obes Surg. 1993;3:421–4.PubMedCrossRefPubMedCentralGoogle Scholar
  152. 152.
    Ybarra J, Sanchez-Hernandez J, Vich I, et al. Unchanged hypovitaminosis D and secondary hyperparathyroidism in morbid obesity alter bariatric surgery. Obes Surg. 2005;15:330–5.PubMedCrossRefPubMedCentralGoogle Scholar
  153. 153.
    Carlin AM, Rao DS, Meslemani AM, et al. Prevalence of vitaminosis D depletion among morbidly obese patients seeking bypass surgery. Surg Obes Relat Dis. 2006;2:98–103.PubMedCrossRefGoogle Scholar
  154. 154.
    El-Kadre LJ, Roca PR, de Almeida Tinoco AC, et al. Calcium metabolism in pre and postmenopausal morbidly obese women at baseline and after laparoscopic Roux-en-Y gastric bypass. Obes Surg. 2004;14:1062–6.PubMedCrossRefGoogle Scholar
  155. 155.
    Schrager S. Dietary calcium intake and obesity. J Am Board Fam Pract. 2005;18:205–10.PubMedCrossRefGoogle Scholar
  156. 156.
    Zemel MB, Richards J, Mathis S, et al. Dairy augmentation of total and central fat loss in obese subjects. Int J Obes. 2005;29:391–7.CrossRefGoogle Scholar
  157. 157.
    Peterlik M, Cross HS. Vitamin D and calcium deficits predispose for multiple chronic diseases. Eur J Clin Investig. 2005;35:290–304.CrossRefGoogle Scholar
  158. 158.
    Holik MF. The vitamin D epidemic and its health consequences. J Nutr. 2005;135:2739S–48S.CrossRefGoogle Scholar
  159. 159.
    Goode LR, Brolin RE, Chowdry HA, Shapes SA. Bone and gastric bypass surgery: effects of dietary calcium and vitamin D. Obes Res. 2004;12:40–7.PubMedCrossRefGoogle Scholar
  160. 160.
    Coates PS, Fernstrom JD, Fernstrom MH, Schauer PR, Greenspan SL. Gastric bypass surgery for morbid obesity leads to an increase in bone turnover and a decrease in bone mass. J Clin Endocrinol Metab. 2004;89:1061–5.PubMedCrossRefGoogle Scholar
  161. 161.
    Golder WS, O’Dorsio TM, Dillon JS, Mason EE. Severe metabolic bone disease as a long-term complication of obesity surgery. Obes Surg. 2002;12:685–92.CrossRefGoogle Scholar
  162. 162.
    Madan AK, Orth WS, Tichansky DS, Ternovits CA. Vitamin and trace mineral levels after laparoscopic gastric bypass. Obes Surg. 2006;16:603–6.PubMedCrossRefGoogle Scholar
  163. 163.
    Scopinaro N, Adami GF, Marinari GM, et al. Biliopancreatic diversion. World J Surg. 1998;22:936–46.PubMedCrossRefGoogle Scholar
  164. 164.
    Stein PD, Matta F. Pulmonary embolism and deep venous thrombosis following bariatric surgery. Obes Surg. 2013;23(5):663–8.PubMedCrossRefPubMedCentralGoogle Scholar
  165. 165.
    Froehling DA, Daniels PR, Mauck KF, et al. Incidence of venous thromboembolism after bariatric surgery: a population-based cohort study. Obes Surg. 2013;23(11):1874–9.PubMedPubMedCentralCrossRefGoogle Scholar
  166. 166.
    Winegar DA, Sherif B, Pate V, Demaria EJ. Venous thromboembolism after bariatric surgery performed by Bariatric Surgery Center of Excellence Participants: analysis of the Bariatric Outcomes Longitudinal Database. Surg Obes Relat Dis. 2011;7(2):181–8.PubMedCrossRefPubMedCentralGoogle Scholar
  167. 167.
    Jamal MH, Corcelles R, Shimizu H, et al. Thromboembolic events in bariatric surgery: a large multi-institutional referral center experience. Surg Endosc. 2015;29(2):376–80.PubMedCrossRefPubMedCentralGoogle Scholar
  168. 168.
    Finks JF, English WJ, Carlin AM, et al. Predicting risk for venous thromboembolism with bariatric surgery: results from the Michigan bariatric surgery collaborative. Ann Surg. 2012;255(6):1100–4.PubMedCrossRefPubMedCentralGoogle Scholar
  169. 169.
    Smith MD, Patterson E, Wahed AS, et al. 30-day mortality after bariatric surgery: independently adjudicated causes of death in the Longitudinal Assessment of Bariatric Surgery. Obes Surg. 2011;21(11):1687–92.PubMedPubMedCentralCrossRefGoogle Scholar
  170. 170.
    Masoomi H, Buchberg B, Reavis KM, et al. Factors predictive of venous thromboembolism in bariatric surgery. Am Surg. 2011;77(10):1403–6.PubMedPubMedCentralGoogle Scholar
  171. 171.
    Chan MM, Hamza N, Ammori BJ. Duration of surgery independently influences risk of venous thromboembolism after laparoscopic bariatric surgery. Surg Obes Relat Dis. 2013;9(1):88–93.PubMedCrossRefPubMedCentralGoogle Scholar
  172. 172.
    Sachdeva A, Dalton M, Amaragiri SV, Lees T. Elastic compression stockings for prevention of deep vein thrombosis. Cochrane Database Syst Rev. 2010;7:CD001484.Google Scholar
  173. 173.
    Urbankova J, Quiroz R, Kucher N, Goldhaber SZ. Intermittent pneumatic compression and deep vein thrombosis prevention. A meta-analysis in postoperative patients. Thromb Haemost. 2005;94(6):1181–5.PubMedGoogle Scholar
  174. 174.
    Gould MK, Garcia DA, Wren SM, et al. Prevention of VTE in non-orthopedic surgical patients. Antithrombotic therapy and prevention of thrombosis, 9th ed: American College of chest physicians evidence-based clinical practice guidelines. Chest. 2012;141(2 Suppl):e227S–77S.PubMedPubMedCentralCrossRefGoogle Scholar
  175. 175.
    Mismetti P, Laporte S, Darmon JY, et al. Meta-analysis of low molecular weight heparin in the prevention of venous thromboembolism in general surgery. Br J Surg. 2001;88(7):913–30.PubMedCrossRefPubMedCentralGoogle Scholar
  176. 176.
    Imberti D, Baldini E, Pierfranceschi MG, et al. Prophylaxis of venous thromboembolism with low molecular weight heparin in bariatric surgery: a prospective, randomised pilot study evaluating two doses of parnaparin (BAFLUX study). Obes Surg. 2014;24(2):284–91.PubMedCrossRefPubMedCentralGoogle Scholar
  177. 177.
    Chlysta WJ, Iffland PH, Haller NA. Review of BMI-based pharmacologic protocols for the prevention of venous thromboembolism in bariatric surgery patients. Bariatric Surg Pract Patient Care. 2014;9(3):91–6.CrossRefGoogle Scholar
  178. 178.
    Borkgren-Okonek MJ, Hart RW, Pantano JE, et al. Enoxaparin thromboprophylaxis in gastric bypass patients: extended duration, dose stratification, and antifactor Xa activity. Surg Obes Relat Dis. 2008;4(5):625–31.PubMedCrossRefPubMedCentralGoogle Scholar
  179. 179.
    Singh K, Podolsky ER, Um S, et al. Evaluating the safety and efficacy of BMI-based preoperative administration of low-molecular-weight heparin in morbidly obese patients undergoing Roux-en-Y gastric bypass surgery. Obes Surg. 2012;22(1):47–51.PubMedCrossRefPubMedCentralGoogle Scholar
  180. 180.
    Ojo P, Asiyanbola B, Valin E, Reinhold R. Post discharge prophylactic anticoagulation in gastric bypass patient – how safe? Obes Surg. 2008;18(7):791–6.PubMedCrossRefPubMedCentralGoogle Scholar
  181. 181.
    Birkmeyer NJ, Share D, Baser O, et al. Preoperative placement of inferior vena cava filters and outcomes after gastric bypass surgery. Ann Surg. 2010;252(2):313–8.PubMedCrossRefPubMedCentralGoogle Scholar
  182. 182.
    Nguyen NT, Goldman C, Rosenquist CJ, et al. Laparoscopic versus open gastric bypass: a randomized study of outcomes, quality of life, and costs. Ann Surg. 2001;234(3):279–89.PubMedPubMedCentralCrossRefGoogle Scholar
  183. 183.
    Schauer PR, Ikramuddin S, Gourash W, et al. Outcomes after laparoscopic Roux-en-Y gastric bypass for morbid obesity. Ann Surg. 2000;232(4):515–29.PubMedPubMedCentralCrossRefGoogle Scholar
  184. 184.
    Higa KD, Boone KB, Ho T. Complications of the laparoscopic Roux-en-Y gastric bypass: 1,040 patients – what have we learned? Obes Surg. 2000;10(6):509–13.PubMedCrossRefPubMedCentralGoogle Scholar
  185. 185.
    Christou NV, Jarand J, Sylvestre JL, McLean AP. Analysis of the incidence and risk factors for wound infections in open bariatric surgery. Obes Surg. 2004;14(1):16–22.PubMedCrossRefPubMedCentralGoogle Scholar
  186. 186.
    Chopra TCK, Dhar S, Deborah T, et al. Epidemiology and outcomes associated with surgical site infection (SSI) following bariatric surgery. Expert Rev Pharmacoecon Outcomes Res. 2010;10(3):317–28.PubMedPubMedCentralCrossRefGoogle Scholar
  187. 187.
    Bratzler DW, Dellinger EP, Olsen KM, et al. Clinical practice guidelines for antimicrobial prophylaxis in surgery. Am J Health-Syst Pharm. 2013;70(3):195–283.PubMedCrossRefPubMedCentralGoogle Scholar
  188. 188.
    Wexler HM. Bacteroides: the good, the bad, and the nitty-gritty. Clin Microbiol Rev. 2007;20(4):593–621.PubMedPubMedCentralCrossRefGoogle Scholar
  189. 189.
    Jones JW, McCullough LB, Richman BW. Informed consent: it’s not just signing a form. Thorac Surg Clin. 2005;15(4):451–60.PubMedCrossRefPubMedCentralGoogle Scholar
  190. 190.
    Greenfield S, Kaplan S, Ware JE Jr. Expanding patient involvement in care. Effects on patient outcomes. Ann Intern Med. 1985;102(4):520–8.PubMedCrossRefPubMedCentralGoogle Scholar
  191. 191.
    Stewart MA. Effective physician-patient communication and health outcomes: a review. CMAJ. 1995;152(9):1423–33.PubMedPubMedCentralGoogle Scholar
  192. 192.
    Chen JY, Tao ML, Tisnado D, et al. Impact of physician-patient discussions on patient satisfaction. Med Care. 2008;46(11):1157–62.PubMedPubMedCentralCrossRefGoogle Scholar
  193. 193.
    Iversen MD, Daltroy LH, Fossel AH, et al. The prognostic importance of patient pre-operative expectations of surgery for lumbar spinal stenosis. Patient Educ Couns. 1998;34(2):169–78.PubMedCrossRefPubMedCentralGoogle Scholar
  194. 194.
    Levinson W, Roter DL, Mullooly JP, et al. Physician-patient communication. The relationship with malpractice claims among primary care physicians and surgeons. JAMA. 1997;277(7):553–9.PubMedCrossRefPubMedCentralGoogle Scholar
  195. 195.
    Brethauer SA, Kothari S, Sudan R, et al. Review article systematic review on reoperative bariatric surgery American Society for Metabolic and Bariatric Surgery Revision Task Force. Surg Obes Relat Dis. 2014;10:952–72.PubMedCrossRefPubMedCentralGoogle Scholar
  196. 196.
    Jafari MD, Jafari F, Young MT, et al. Surg Endosc. 2013 Dec;27(12):4539–46.PubMedCrossRefPubMedCentralGoogle Scholar
  197. 197.
    Standards Manual. Resources for optimal care of the metabolic and bariatric surgery patient. 2016. https://www.facs.org/quality-programs/mbsaqip/standards. Accessed: 5/5/17.

Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of SurgeryGrand Health Partners, Mercy Health Saint Mary’sGrand RapidsUSA
  2. 2.Department of SurgeryGrand Health Partners, North Ottawa Community Health SystemGrand RapidsUSA

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