About this article
Medically reviewed- Written by
- Dr Paul Watson
- Medically reviewed by
- Dr Han Simpson
- Published
- May 26, 2026
- Medical review date
- September 8, 2026
- Evidence searched through
- September 8, 2026
- Next review due
- September 8, 2027
- Intended audience
- General Readers & Patients
- Geographic scope
- Worldwide
- Conflicts of interest
- None declared.
- Funding
- Website Owner
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- Report an error or editorial concern
- Medical disclaimer
- Read the medical disclaimer
The jackknife prone position for surgery is a specialized surgical positioning technique commonly used for procedures involving the rectum, anus, lower spine, and posterior pelvic region.
In this position, the patient lies face down while the operating table is flexed at the hips, creating an inverted “V” or “jackknife” shape. This positioning allows surgeons improved access to specific anatomical areas while helping optimize visibility and surgical precision.
This doctor-written guide explains:
- What the jackknife prone position is
- Why surgeons use it
- Common surgeries performed in this position
- Risks and complications
- Safety precautions
- Recovery considerations
What Is the Jackknife Prone Position for Surgery?
The jackknife prone position for surgery is a variation of the prone surgical position.
In the standard prone position, the patient lies flat on their abdomen.
In the jackknife position:
- The patient remains face down
- The hips are elevated
- The operating table bends sharply at the waist
- The head and legs angle downward
This creates improved exposure of the:
- Perianal area
- Rectum
- Sacral region
- Coccyx
- Lower spine
The position resembles a folding pocketknife, which is where the name “jackknife” originates.
Why Is the Jackknife Position Used?
The jackknife prone position provides surgeons with better access and visibility during delicate lower-body procedures.
Benefits include:
- Improved surgical exposure
- Better access to the anal and rectal area
- Reduced tissue obstruction
- Easier instrument positioning
- Enhanced precision during colorectal procedures
The position is especially useful when operating on structures located deep within the pelvis or posterior body.
Common Surgeries Performed in the Jackknife Prone Position
Many procedures use the jackknife prone position for surgery because it offers ideal access to the lower posterior anatomy.
Hemorrhoid Surgery
Hemorrhoidectomy procedures frequently use this position to improve access to swollen hemorrhoidal tissue.
Pilonidal Cyst Surgery
Pilonidal cyst removal often requires excellent visibility near the tailbone and upper buttock crease.
Rectal Surgery
Procedures involving:
- Rectal tumors
- Rectal prolapse
- Fistulas
- Abscess drainage
may utilize the jackknife position.
Spine and Sacral Procedures
Some lower spinal surgeries use modified prone or jackknife positioning.
Anal Fissure Surgery
Sphincterotomy procedures may also use this setup for optimal visualization.
How Patients Are Positioned
During setup for the jackknife prone position for surgery, the medical team carefully protects pressure points and airways.
Positioning Steps
Typical positioning includes:
- Patient placed under anesthesia
- Patient carefully turned face down
- Chest and hips supported with padding
- Table flexed at the waist
- Arms positioned safely
- Head secured in neutral alignment
Padding helps reduce:
- Nerve compression
- Pressure injuries
- Circulation problems
Risks of the Jackknife Prone Position for Surgery
Although commonly used safely, surgical positioning carries certain risks.
Potential complications include:
Nerve Injuries
Pressure on nerves may rarely cause:
- Temporary numbness
- Weakness
- Tingling
- Peripheral nerve injury
Pressure Sores
Long procedures may increase pressure injury risk.
Areas commonly affected include:
- Knees
- Hips
- Face
- Chest
- Shoulders
Eye Complications
Rarely, prolonged prone surgery may affect eye pressure or vision.
Breathing Challenges
Because the chest faces downward, anesthesia teams carefully monitor breathing and oxygenation.
Blood Pressure Changes
Table positioning may affect circulation and blood pressure during surgery.
How Surgeons Reduce Positioning Risks
Modern surgical teams use multiple safety precautions during prone positioning.
These may include:
- Specialized surgical padding
- Frequent pressure checks
- Careful airway monitoring
- Arm positioning protocols
- Eye protection
- Blood pressure monitoring
Positioning injuries are uncommon when proper precautions are followed.
Who May Not Be Ideal Candidates?
Certain patients may require modified positioning or additional precautions.
Higher-risk patients may include those with:
- Severe obesity (source)
- Advanced arthritis
- Spine instability
- Breathing disorders
- Cardiovascular disease
- Limited neck mobility
The anesthesia and surgical teams assess these factors before surgery.
What Patients May Feel After Surgery
Some patients notice mild soreness after surgery related partly to positioning.
Temporary symptoms may include:
- Neck stiffness
- Shoulder soreness
- Mild chest discomfort
- Hip tightness
- Facial swelling
These symptoms are usually temporary and improve within days.
Recovery After Jackknife Position Surgery
Recovery depends more on the procedure itself than the position alone.
However, patients are typically monitored for:
- Circulation problems
- Nerve symptoms
- Pressure-related skin changes
- Breathing issues
- Pain control
Most patients recover without positioning complications.
Advantages of the Jackknife Prone Position for Surgery
The jackknife prone position for surgery offers several important benefits.
Excellent Surgical Access
The elevated hips provide better exposure of deep pelvic structures.
Improved Precision
Surgeons may operate more accurately with improved visualization.
Reduced Tissue Interference
Gravity helps separate tissue naturally during surgery.
Widely Used and Familiar
The position is well-established in colorectal and anorectal surgery.
Potential Disadvantages
Despite its benefits, the position is not perfect.
Possible drawbacks include:
- More complex anesthesia management
- Increased pressure-point monitoring
- Longer setup time
- Rare nerve injury risk
- Limited suitability for some patients
Frequently Asked Questions
What is the jackknife prone position used for?
It is commonly used for colorectal, anorectal, sacral, and pilonidal surgeries.
Is the jackknife position safe?
Yes. When proper precautions are followed, it is generally considered very safe.
Are patients awake in the jackknife position?
Most surgeries using this position are performed under general anesthesia.
Can the position cause nerve damage?
Rarely, prolonged pressure may cause temporary or permanent nerve injury.
Why are hips elevated during surgery?
Elevating the hips improves surgical access and visibility for the operating surgeon.
Final Thoughts on the Jackknife Prone Position for Surgery
The jackknife prone position for surgery is a highly effective surgical positioning technique widely used in colorectal, anorectal, and sacral procedures.
By elevating the hips while the patient lies face down, surgeons gain improved visibility and access to difficult anatomical areas.
Although all surgical positions carry some risk, modern operating room protocols make serious complications uncommon.
Patients scheduled for surgery in the jackknife position should discuss:
- Positioning risks
- Recovery expectations
- Procedure-specific concerns
- Existing medical conditions
with their surgical and anesthesia teams before the operation.