The impacts of super obesity versus morbid obesity on respiratory mechanics and simple hemodynamic parameters during bariatric surgery

Tamer Salihoglu, Ziya Salihoglu, Abdullah Kagan Zengin, Mustafa Taskin, Nilgun Colakoglu, Rovnat Babazade

Research output: Contribution to journalArticle

19 Scopus citations


Background: This study was designed to determine the impact of the degree of obesity on respiratory mechanics and simple hemodynamic parameters at laparoscopic bariatric surgery. Methods: The patients were divided into two groups, each of which included 24 patients (a morbidly obese group and a super obese group) undergoing laparoscopic bariatric surgery. Dynamic respiratory compliance, respiratory resistance, and peak inspiratory pressures were measured at four time points: 10 min after anesthesia induction (T1: induction), 10 min after pneumoperitoneum (T2: pneumoperitoneum), 10 min after terminating pneumoperitoneum (T3: end-pneumoperitoneum), and before extubation (T4: extubation). The systolic, diastolic, and mean arterial pressures and the heart rate values were measured noninvasively in T0 (10 min before operation). Results: Obesity was found to cause a statistically significant increase in respiratory resistance and a peak inspiratory pressure and a decrease in dynamic respiratory compliance. In the morbidly obese group, the lowest dynamic respiratory compliance was 37 ± 12 mL/cm H2O, but it was 33 ± 13 mL/cm H2O in the super obese group. The systolic pressure, diastolic pressure, and mean arterial pressure were found to decrease significantly in both groups. Conclusions: Morbid obesity and super obesity have negative effects on hemodynamics and respiratory mechanics.

Original languageEnglish (US)
Pages (from-to)379-383
Number of pages5
JournalObesity Surgery
Issue number3
StatePublished - Mar 1 2013
Externally publishedYes



  • Anesthesia
  • Compliance
  • Hemodynamics
  • Obesity
  • Surgery

ASJC Scopus subject areas

  • Surgery
  • Endocrinology, Diabetes and Metabolism
  • Nutrition and Dietetics

Cite this