A femoral cutdown is a surgical procedure in which a doctor makes an incision in the upper thigh to directly expose the femoral artery or vein, allowing instruments, catheters, or cannulas to be placed into the blood vessel under direct vision. It stands in contrast to the more common percutaneous approach, where a needle punctures the skin and vessel without a surgical incision. The cutdown has been a workhorse technique in vascular surgery, trauma care, and cardiac procedures for decades, and although percutaneous methods have taken over much of its territory, the cutdown remains the fallback when needles alone won’t do.
Why the Femoral Vessels Matter
The femoral artery and vein sit in the groin crease, running from the pelvis into the leg. They are among the largest and most accessible blood vessels in the body, which makes them a preferred entry point whenever a clinician needs to thread large devices into the circulatory system. Procedures like aortic aneurysm repair, heart valve replacement through a catheter, and mechanical circulatory support all depend on getting sizable hardware through a femoral vessel and up into the chest or abdomen. The femoral site is also valuable in emergencies because the vessels are relatively close to the skin surface and have predictable anatomical landmarks.
Most of the time, clinicians access these vessels percutaneously: they use ultrasound guidance, slide a needle through the skin, confirm they are in the vessel, and thread a wire and sheath into place. That works well when vessels are healthy, the patient is stable, and the devices being used are not too large. A cutdown becomes necessary when those conditions are not met.
Situations That Call for a Cutdown
The most common reason to perform a femoral cutdown today is the need for large-bore access. Procedures like endovascular aneurysm repair, transcatheter aortic valve implantation, and mechanical circulatory support systems require sheaths that can be substantially wider than those used in routine catheterizations. These large-bore technologies have become preferred strategies for a growing number of conditions, and their adoption continues to expand, but the bigger the device, the harder it is to insert and remove safely through a simple needle puncture.
Scarred or heavily calcified femoral vessels are another trigger. Patients who have had prior groin surgery, radiation, or severe peripheral artery disease may have vessels that are stiff, narrowed, or surrounded by scar tissue. A percutaneous needle may not pass cleanly, or the vessel wall may be too diseased to accept a closure device afterward. In those cases, a cutdown gives the surgeon a clear view of exactly what they are working with.
Trauma and emergency resuscitation represent a third major indication. Endovascular resuscitation is an emerging field for managing severe traumatic hemorrhage and non-traumatic cardiac arrest, and gaining vascular access is the critical first step. When a patient is in hemorrhagic shock and the groin anatomy is distorted by injury, swelling, or low blood pressure that makes vessels hard to find with ultrasound, a cutdown provides a reliable path to the femoral vessels.
How the Procedure Is Performed
The technique follows a predictable sequence. After the groin is prepped and draped, the surgeon makes a longitudinal incision that begins roughly midway between the bony point at the front of the hip and the pubic bone, extending along the inner border of the sartorius muscle toward the knee. The length of the incision varies depending on the clinical scenario and the patient’s body habitus, but it is typically several centimeters long. The surgeon then cuts through the subcutaneous fat and the fascia lata, the tough sheet of connective tissue overlying the thigh muscles, and opens the femoral sheath to expose the vessels directly.
Once the artery or vein is visible, the surgeon can choose exactly where to make the arteriotomy or venotomy, the small opening through which the catheter or cannula enters the blood vessel. A common refinement involves placing a purse-string suture, a circular stitch around the intended entry point, before inserting the sheath. This suture is left loose during the procedure and cinched tight at the end, providing an immediate, watertight seal that avoids the need for blind manual compression afterward.
After the main procedure is finished and the sheath is removed, the surgeon closes the vessel, often by tightening that purse-string suture or by directly suturing the arteriotomy. The wound is then closed in layers: fascia, subcutaneous tissue, and skin. The whole process adds time compared with a needle stick, but it trades that time for control.
How Cutdown Compares With Percutaneous Access
The shift toward percutaneous techniques over the past two decades has been driven by real advantages. In a large comparative study of patients undergoing endovascular aortic aneurysm repair, those who had percutaneous access had shorter operative times (about 135 minutes versus 152 minutes on average), shorter hospital stays (a median of one day versus two), and fewer wound complications. For elective cases in patients with healthy vessels, percutaneous access is now the default at most centers.
Yet the cutdown has its own strengths, particularly in reliability. A single-center study comparing the two approaches for aortic repair found that the cutdown achieved a technical success rate of 100 percent across 84 groin incisions, while the percutaneous closure approach succeeded about 98 percent of the time. A separate prospective study reported similar findings: cutdown achieved 99 percent technical success, while percutaneous closure devices had a higher rate of intraoperative failures requiring conversion to open repair. When a closure device fails, the fallback is usually an emergency cutdown anyway, so some surgeons prefer to start with the approach that carries the lowest risk of needing a rescue.
The tradeoff, then, is speed and recovery versus reliability and control. For straightforward anatomy and smaller devices, percutaneous wins. For hostile groins, very large sheaths, or situations where failure is not an option, the cutdown earns its place.
Risks and Complications
Any surgical incision carries risk, and a femoral cutdown is no exception. The most studied complication is wound trouble. In a large cohort of nearly 15,000 patients who had open femoral artery exposure for elective aortic aneurysm repair, about 2.6 percent developed wound complications, and the vast majority of those (94 percent) were superficial or deep surgical site infections. These numbers reflect the baseline risk of cutting through skin and tissue in the warm, moist groin crease, a location that is inherently prone to infection.
Lymphatic injury is another concern specific to groin incisions. The femoral vessels are surrounded by lymph nodes and lymphatic channels, and disrupting them during dissection can lead to lymph fistula, a persistent leak of clear lymphatic fluid from the wound. In one study comparing cutdown to percutaneous closure devices in minimally invasive cardiac surgery, lymph fistula occurred in about 11 percent of cutdown patients compared with less than 1 percent in the percutaneous group, and wound healing problems requiring vacuum-assisted closure therapy occurred only in the cutdown group.
Nerve injury is possible but uncommon. Most arteries used for vascular access lie close to a nerve, and the femoral nerve runs alongside the femoral artery. Damage can occur from direct surgical dissection, needle puncture, or compression from a hematoma forming after the procedure. Published rates for femoral access nerve injury are quite low, reported as low as 0.04 percent in a large retrospective study, though injury rates climb for access through the arm.
Bleeding and pseudoaneurysm formation, where blood pools in a contained pocket next to the vessel wall, are risks shared with percutaneous approaches as well. One study found pseudoaneurysms in about 3 percent of groins after cutdown, but none of them required surgical intervention. The purse-string suture technique described earlier is specifically designed to minimize these vascular complications by allowing a controlled, visible closure of the arteriotomy.
The Cutdown in ECMO
Extracorporeal membrane oxygenation, or ECMO, is one of the most important modern applications of femoral cutdown. ECMO involves draining a patient’s blood, oxygenating it through an external machine, and returning it to the body. When this is done through the femoral vessels, large cannulas are inserted into both the artery and the vein. The femoral route is favored because it is less invasive than opening the chest and allows cardiac support to be started rapidly in critically ill patients.
A specific problem with femoral arterial ECMO cannulation is limb ischemia. The large arterial cannula can partially or fully block blood flow to the leg downstream of the insertion site. To prevent this, surgeons place a distal perfusion cannula, a smaller tube that diverts oxygenated blood back into the leg’s arteries below the main ECMO cannula. When percutaneous placement of the distal perfusion cannula fails, a cutdown to the superficial femoral artery provides a reliable rescue. One series found that when initial percutaneous placement was unsuccessful, a surgeon could dissect down to the artery and complete the distal perfusion cannula placement in under five minutes, restoring limb blood flow immediately without any procedural complications such as bleeding, hematoma, or infection. The delay to ECMO initiation was about 30 minutes in those cases.
The cutdown also plays a role at the other end of ECMO treatment: decannulation, or removing the cannulas once the patient has recovered enough to come off the machine. Because the cannulas are so large, simply pulling them out and holding pressure is not always safe. Some centers have shifted toward percutaneous closure devices for decannulation, with data suggesting shorter procedure times, less blood loss, and shorter ICU stays compared with surgical repair. One center reported that it replaced surgical cutdown with percutaneous closure for all ECMO decannulations starting in 2014, reflecting the broader trend toward less invasive approaches whenever feasible.
The Cutdown in Minimally Invasive Cardiac Surgery
Femoral cannulation is also central to minimally invasive cardiac surgery, where the heart is accessed through small incisions rather than a full sternotomy. The heart-lung bypass machine is connected through the femoral vessels instead of directly through the chest. Historically this was done via cutdown, but percutaneous closure devices have made inroads here as well.
A recent comparison of single-device percutaneous closure versus open cutdown in minimally invasive cardiac surgery found that cutdown patients had a significantly higher rate of access-site complications: about 14 percent versus less than 1 percent for the percutaneous group. The difference was driven mainly by lymph fistula and wound healing problems. On the other hand, intraoperative bleeding that required emergency open femoral revision was more common in the percutaneous group, occurring in about 5 percent of those cases. This pattern illustrates the general trade-off: percutaneous techniques cause fewer wound-related problems after surgery but carry a slightly higher risk of acute vascular complications during the procedure, which then require a cutdown to fix.
When the Femoral Route Is Not an Option
Sometimes the femoral vessels themselves are too diseased, too small, or otherwise unsuitable for access. Patients with severe peripheral arterial disease, prior femoral bypass grafts, or extensive aortoiliac occlusions may not be candidates for any femoral-based approach, whether cutdown or percutaneous. In those situations, surgeons turn to alternative access sites.
The axillary artery, located in the armpit, is the most common alternative for large-bore procedures. Percutaneous axillary access has gained traction particularly for patients who need prolonged mechanical circulatory support, because the arm location allows the patient to sit up, walk, and participate in physical therapy while the device is in place, something that is impossible with femoral access. Complication rates at the axillary site vary: one study found an overall complication rate of about 11 percent for surgical cutdown via the axillary artery, compared with roughly 25 to 29 percent for access through the smaller brachial artery in the upper arm.
The brachial artery is sometimes used for smaller-bore procedures, but its smaller diameter means it tolerates large sheaths poorly, and complication rates are higher. Nerve injury is a particular concern with upper-arm access, with reported rates as high as 9 percent for brachial and axillary access. For most large-bore applications, the femoral vessels remain the first choice, with the axillary artery as the primary backup and the brachial artery reserved for situations where no better option exists.
Training for the Procedure
One challenge with femoral cutdown is that trainees get fewer opportunities to practice it as percutaneous techniques dominate routine cases. When an emergency cutdown is needed, it is often in a high-stakes, time-pressured scenario, exactly the wrong moment to be performing a procedure for the first time. Simulation-based training has emerged as a way to bridge this gap.
A vascular access simulation curriculum evaluated surgical and medical trainees before and after a structured training program. Before training, over half the participants (54 percent) could not independently complete the procedure. After the curriculum, only 8 percent were unable to finish independently, and the average time to complete the procedure dropped from about seven minutes to under four minutes. Scores on a global rating scale for the ability to obtain femoral arterial access improved substantially. These results suggest that simulation can meaningfully prepare trainees for a procedure they may rarely encounter in elective settings but need to perform confidently when the moment arrives.
The tension here is real for surgical training programs. As percutaneous approaches replace cutdowns in elective cases, the opportunities for supervised, low-pressure learning shrink. But the cutdown remains the safety net for failed percutaneous access, which means every vascular surgeon, trauma surgeon, and interventional cardiologist still needs to know how to do one. Simulation addresses part of this problem, but hands-on experience with real tissue, gained in elective cases where time pressure is low, remains valuable. Some programs deliberately maintain cutdown as an option in a portion of their elective cases partly for this reason.
Percutaneous Closure Devices and Their Limits
Much of the modern story of femoral cutdown is really the story of the devices designed to replace it. Percutaneous closure devices work by deploying sutures, plugs, or clips inside or around the arteriotomy from the skin surface, sealing the vessel without an incision. When they work, recovery is faster and wound complications are fewer. The growing adoption of these devices across endovascular repair, heart valve procedures, and ECMO decannulation has been one of the most significant shifts in vascular access management.
But closure devices have failure modes that the cutdown does not. The device may not deploy correctly, the suture may not hold in a calcified or diseased vessel wall, or the artery may thrombose after deployment. In the aortic repair study that reported 98 percent percutaneous success, the failures included one femoral artery occlusion requiring conversion to surgical repair and one pseudoaneurysm that developed a week later. The prospective study comparing techniques found that cutdown performed significantly better than percutaneous fascial closure in overall technical success. When a closure device fails during a procedure, the patient ends up getting a cutdown anyway, but now under less controlled circumstances, sometimes with active bleeding.
Meticulous access site management matters regardless of approach. For percutaneous cases, this means careful ultrasound-guided puncture, appropriate device selection, and a low threshold for converting to open repair if something goes wrong. For cutdowns, it means precise surgical technique, gentle handling of lymphatic structures, and proper layered wound closure. Neither approach is universally superior. The right choice depends on the patient’s anatomy, the size of the device being used, the clinical urgency, and the team’s experience with both techniques.