Kocher Maneuver
The maneuver used to expose the posterior wall of the stomach during open laparotomy is the Kocher maneuver, which involves mobilizing the duodenum by incising the lateral peritoneal reflection and reflecting the duodenum and pancreatic head medially to access the posterior gastric wall and retroperitoneum.
Technique and Application
The Kocher maneuver is a fundamental surgical technique that provides access to structures posterior to the stomach and duodenum. The procedure involves:
- Incising the lateral peritoneal attachments of the duodenum along the white line of Toldt
- Blunt dissection to mobilize the duodenum and pancreatic head medially
- Reflection of the second and third portions of the duodenum toward the midline
- This exposes the posterior wall of the stomach, pancreas, inferior vena cava, and aorta
Clinical Context in Gastric Surgery
During gastric operations, examining the posterior gastric wall is essential for:
- Assessing tumor invasion in gastric cancer cases 1
- Evaluating the bursa omentalis (lesser sac) for disease involvement
- Determining the need for bursectomy when the posterior gastric wall serosa is infiltrated by tumor 1, 2
The Italian guidelines for gastric cancer specifically note that when the posterior gastric wall serosa is infiltrated, removal of the inner peritoneal surface of the bursa omentalis may be performed 1. However, bursectomy should be avoided in T1/T2 tumors to prevent injury to the pancreas and adjacent vessels 2.
Alternative Access Methods
While the Kocher maneuver is the standard approach for posterior gastric wall examination, other techniques may be employed depending on the surgical context:
- Division of the gastrocolic ligament provides access to the lesser sac from an anterior approach
- Hanging maneuver of the stomach (primarily used in laparoscopic procedures) involves encircling the stomach with tape and retracting it to expose posterior structures 3
Important Surgical Considerations
When performing the Kocher maneuver:
- Avoid excessive traction that could injure the superior mesenteric vessels
- Identify the inferior vena cava to prevent inadvertent injury
- Assess for anatomic variations in vascular anatomy before proceeding
- The maneuver is reversible and the duodenum returns to its normal position after the procedure
This technique remains a cornerstone of upper abdominal surgery and is essential knowledge for any surgeon performing gastric or pancreatic operations.