JOCS
Journal of Comprehensive Surgery

The aim of the Comprehensive Surgery is to publish original research articles of the highest scientific and clinical value at the international level in all surgical fields.

eISSN: 2980-0862
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Original Article
The effect of the prone position on intra-abdominal pressure and renal function
Abstract
Aims: Various surgical procedures are performed on patients in the prone position. Intra-abdominal pressure (IAP) refers to the pressure within the abdominal cavity between the internal organs and the abdominal wall. This study investigated the effect of the prone position-via increased IAP-on renal function.
Methods: This prospective observational study included patients aged 18-75 years with an American Society of Anesthesiologists (ASA) classification of I-III. 38 patients undergoing spinal surgery in the prone position and 37 patients undergoing colorectal surgery in the supine position were evaluated. Demographic characteristics, IAP, perioperative renal parameters, intraoperative blood loss, and postoperative course were assessed. IAP was measured by intravesical pressure monitoring.
Results: In patients undergoing lumbar surgery, IAP was significantly higher in the prone position (14 mmHg) compared with the supine position (11 mmHg; p<0.05). The incidence of class I intra-abdominal hypertension (IAH) was significantly higher in the prone position than in the supine position (p<0.001). A positive and significant correlation was found between body mass index (BMI) and IAP in both patients undergoing lumbar and colorectal surgery (p<0.001). Postoperative urea levels at 1, 24, and 48 hours were significantly higher in patients who underwent lumbar surgery (p<0.05). Among those undergoing colorectal surgery, patients with class I IAH had significantly higher intraoperative blood loss than those with normal IAP (p<0.05).
Conclusion: To prevent renal complications during surgery, patient positioning and fluid management should be monitored carefully. In addition, it should be noted that increased IAP can lead to greater intraoperative blood loss.

Keywords : Prone position, intra-abdominal hypertension, kidney function test

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Article available in :
Volume 4, Issue 2, 2026
Page : 30-35
https://doi.org/10.51271/JOCS-0073
Article Information
Received : 08 Şub 2026
Accepted : 24 Mar 2026
Published : 23 May 2026
Corresponding Author :

Esra Temizer: Department of Anesthesiology and Reanimation, Ankara Bilkent City Hospital, Ankara, Turkiye

[email protected]
Citation : Temizer E, Aksoy ŞM, Erdem G. The effect of the prone position on intra-abdominal pressure and renal function. J Compr Surg. 2026;4(2):30-35.

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