Abstract
Obesity affects respiratory and hemodynamic function in anesthetized patients. The aim of this study was to evaluate the influence of the body mass index (BMI) on pulmonary changes in a permanent 45° steep Trendelenburg position (STP) during robotic-assisted laparoscopic prostatectomy (RALP). 51 patients undergoing RALP under standardized anesthesia were included. Perioperative pulmonary function and oxygenation were measured in awake patients (T0), 20 min after the induction of anesthesia (T1), after insufflation of the abdomen in supine position (T2), after 30 min in STP (T3), when controlling Santorini’s plexus in STP (T4), before awakening while supine (T5), and after 45 min in the recovery room (T6). Patient-specific and time-dependent factor on ventilation and predicted peak inspiratory pressure (PIP), driving pressure (Pdriv) and lung compliance (LC) in a linear regression model were calculated. PIP and Pdriv increased significantly after induction of capnoperitoneum (T2–4) (p < 0.0001). In univariate mixed effects models, BMI was found to be a significant predictor for PIP and Pdriv increase and LC decrease. Obese patients a BMI > 31 kg/m2 reached critical PIP values ≥ 35 cmH2O. Postoperative oxygenation represented by the PaO2/FiO2 ratio was significantly decreased compared to T0 (p < 0.0001). Obesity in combination with STP and capnoperitoneum during RALP has a profound effect on pulmonary function. Increased PIP and Pdriv and decreased LC are directly correlated with a high BMI. Changes in PIP, Pdriv and LC during RALP may be predicted in relation to patient’s BMI for consideration in the preoperative setting. Trial registration number Z-2014-0387-6. Registered on 8 July 2014.
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Abbreviations
- ASA:
-
American Society of Anesthesia
- BE:
-
Base excess
- BMI:
-
Body mass index
- etCO2 :
-
End tidal CO2
- FiO2 :
-
Inspiratory fraction of oxygen
- LC:
-
Lung compliance
- MAP:
-
Mean arterial blood pressure
- MV:
-
Minute ventilation
- PaCO2 :
-
Partial arterial carbon dioxide fraction
- PaO2 :
-
Partial arterial oxygen fraction
- Pdriv :
-
Driving pressure
- PEEP:
-
Positive end-expiratory pressure
- PIP:
-
Peak inspiratory pressure
- RALP:
-
Robotic-assisted laparoscopic prostatectomy
- STP:
-
Steep Trendelenburg position
- TIVA:
-
Total intravenous anesthesia
- TOF:
-
Train-of-four
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All data generated or analyzed during this study are included in this published article and are available from the corresponding author on reasonable request.
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SB: Ethics approval, study design, data collection and analysis, drafted the manuscript and reviewed it for important intellectual content; MH: Idea for study, study design, patient recruitment, data collection and finally reviewed the manuscript for important intellectual content; FZ: Data analysis and interpretation, finally reviewed the manuscript for important intellectual content; TS: Made acquisitions, interpret data and finally reviewed the manuscript for important intellectual content; ML: Made acquisitions, interpret data and finally reviewed the manuscript for important intellectual content; MB: Made acquisitions, interpret data and finally reviewed the manuscript for important intellectual content; SD: Made acquisitions and interpret of data and finally reviewed the manuscript for important intellectual content; MP: Idea for study, study design, data collection and interpretation, patient recruitment and finally reviewed the manuscript for important intellectual content.
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The authors declares that they have no competing interest in relation to this paper.
Ethics approval
This study was approved by the local institutional review board of the University of Regensburg (Protocol No. 14-101-0107) and registered at the local Center for Clinical Studies (Z-2014-0387-6. Registered on 8 July 2014).
Informed consent
After detailed explanation, written informed consent was obtained from 51 patients scheduled for elective prostatectomy at the Department of Urology in Regensburg.
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Blecha, S., Harth, M., Zeman, F. et al. The impact of obesity on pulmonary deterioration in patients undergoing robotic-assisted laparoscopic prostatectomy. J Clin Monit Comput 33, 133–143 (2019). https://doi.org/10.1007/s10877-018-0142-3
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DOI: https://doi.org/10.1007/s10877-018-0142-3