What is the Pfannenstiel incision and how is it performed?

The Pfannenstiel Incision: Technique and Clinical Application

The Pfannenstiel incision is a transverse suprapubic approach that involves a transverse skin cut, transverse opening of the anterior rectus sheath, blunt lateral separation of the rectus muscles (not at the midline), and transverse peritoneal entry—this true technique provides significantly lower hernia rates and better wound outcomes compared to any approach that opens the fascia at the midline. 1

Anatomical Definition and Surgical Technique

The true Pfannenstiel incision must maintain transverse orientation through all tissue layers to preserve its structural advantages. 1 The procedure consists of:

• Transverse suprapubic skin incision, typically 10-12 cm in length, placed approximately 2 fingerbreadths above the pubic symphysis 2
• Transverse opening of the anterior rectus sheath from lateral to medial 1
• Blunt lateral separation of the rectus muscles away from the midline—this is critical, as opening at the linea alba negates the benefits of the transverse approach 1
• Transverse peritoneal entry to access the lower abdomen 3

Clinical Indications and Applications

The Pfannenstiel approach provides optimal access to pelvic organs and lower abdominal structures. 4 It is commonly used for:

• Gynecological procedures 4
• Lower abdominal and pelvic surgeries 3
• Colorectal surgery of the left colon and rectum 5
• Urological procedures including radical prostatectomy and nephrectomy 2, 6
• Extraction site for laparoscopic procedures (strongly preferred over midline) 3

Evidence-Based Advantages

Transverse incisions demonstrate significantly superior outcomes compared to midline approaches across multiple critical endpoints. 3

Hernia Prevention

• Incisional hernia rates are significantly lower after transverse incisions compared to midline approaches, with the Pfannenstiel technique showing hernia rates of only 0-2% 4
• The 2023 World Society of Emergency Surgery guidelines provide strong recommendation against midline incision as extraction sites when non-midline alternatives are feasible (Strong recommendation, High-certainty evidence) 3

Wound Complications and Recovery

• Reduced wound dehiscence and burst abdomen rates compared to midline laparotomy 3
• Less impairment of pulmonary function postoperatively 3
• Decreased postoperative pain—studies show pain is mild on day 1, low on day 2, and absent by day 5, with 65% of patients requiring no analgesics 5
• Excellent cosmetic results with the scar hidden below the bikini line 4, 2

Critical Technical Pitfall: The "False Pfannenstiel"

The most important caveat is that a transverse skin incision alone does NOT provide the benefits of a true Pfannenstiel if the fascia is opened vertically at the midline. 1

• Opening the fascia at the linea alba (midline) increases hernia risk regardless of skin incision orientation 1
• Midline fascial separation nullifies the mechanical advantages of the transverse, muscle-sparing technique 1
• Misalignment between transverse skin and midline fascial cuts can increase wound-related complications 1

Optimal Closure Technique

Proper closure of the true Pfannenstiel incision is essential to maintain its structural integrity. 1

• Close the transverse fascia with continuous suture to maintain tensile strength 1
• Re-approximate subcutaneous tissue ≥2 cm thick to reduce dead space and seroma formation 1
• Use subcuticular suturing of skin (preferred over staples) for superior wound outcomes 1
• Do NOT suture the rectus muscles at the midline—this is unnecessary in a true Pfannenstiel and may cause tissue damage 1
• Close in multiple layers with attention to hemostasis 2

Contraindications and Limitations

Avoid the Pfannenstiel approach in specific high-risk populations:

• Heavy or moderate smokers 7
• Diabetic patients 7
• Patients with significant obesity 7
• Avoid extending the incision too far laterally to prevent nerve damage complications 4

Emergency Surgery Considerations

In hemodynamically unstable patients requiring urgent exploration, midline laparotomy remains the incision of choice because it is faster and allows best access to all peritoneal organs. 3 However, when preoperative imaging clearly identifies the pathology site and clinical circumstances allow, a transverse incision should be used to reduce hernia rates and improve recovery 3