Serum Bicarbonate Changes During Laparoscopic Bariatric Surgery

Condition(s) studied

Investigational drug(s) / intervention(s)

Laparoscopic Bariatric Surgery: Standard-of-care laparoscopic bariatric surgery (laparoscopic sleeve gastrectomy or Roux-en-Y gastric bypass) performed according to institutional protocols. No experimental intervention is introduced. The study prospectively observes perioperative serum bicarbonate changes and their association with pneumoperitoneum duration and early discharge readiness.

Study summary

Pneumoperitoneum during laparoscopic bariatric surgery induces carbon dioxide absorption and may lead to perioperative alterations in acid-base balance. Serum bicarbonate (HCO₃-) plays a central role in metabolic compensation; however, the clinical relevance of perioperative bicarbonate changes remains insufficiently defined.

This prospective observational study aims to evaluate the association between pneumoperitoneum duration and perioperative serum bicarbonate change (ΔHCO₃-), and to investigate whether ΔHCO₃- is associated with early discharge readiness at 48 hours (DR-48) following laparoscopic bariatric surgery. Patients undergoing laparoscopic sleeve gastrectomy or Roux-en-Y gastric bypass will be enrolled consecutively. No alteration of routine clinical care will occur.

Eligibility

Primary outcome measure(s)

• Perioperative Serum Bicarbonate Change (ΔHCO₃-) — From baseline (after induction, before pneumoperitoneum) to 24 hours postoperatively
  Change in serum bicarbonate (HCO₃-) between the preoperative value (after induction, before pneumoperitoneum) and the postoperative 24-hour value, calculated as: ΔHCO₃- = HCO₃-(24 h postoperative) - HCO₃-(preoperative). The association between pneumoperitoneum duration (minutes) and ΔHCO₃- will be evaluated.

Trial sites (1)

More Istinye University trials in Turkey