Gomco circumcision is one of the most widely used methods for newborn circumcision in the United States, relying on a bell-shaped metal clamp that crushes the foreskin to control bleeding before the tissue is excised. The device was invented more than 80 years ago in Buffalo, New York, by physician Hiram S. Yellen and engineer Aaron A. Goldstein, and it remains a fixture in hospital nurseries and outpatient offices today. Despite its long track record, the Gomco technique involves specific sizing decisions, pain-management choices, and age limits that parents and providers should understand before the procedure happens.
How the Gomco Clamp Works
The Gomco clamp is a reusable stainless-steel instrument made up of a few interlocking parts: a bell that fits over the head of the penis beneath the foreskin, a flat base plate with a hole through which the bell protrudes, and a screw-down arm that tightens the foreskin between the bell and the plate. Once the foreskin is pulled up and over the bell, the provider secures the plate and tightens the arm, compressing the tissue for several minutes. That compression crushes the blood vessels in the foreskin, creating hemostasis before the provider uses a scalpel to cut away the skin above the plate. The bell is then removed, and the remaining skin retracts to expose the glans. Because the crushing step seals off blood vessels before any cutting happens, the Gomco tends to produce a relatively controlled surgical field with limited active bleeding.
The clamp comes in multiple sizes, and selecting the right one matters. If the bell is too small it can injure the glans; if it is too large it may not compress the tissue tightly enough. Providers choose the appropriate size based on the diameter of the glans, which varies with the infant’s age and weight. A study from Iraq that used three different clamp sizes noted that choosing the suitable size, along with adequate training and good aftercare, minimized most complications.1Iraqi Journal of Medical Sciences. Gomco clamp circumcision in neonates and infants: a preliminary experience in Iraq
Pain Management During the Procedure
Circumcision without anesthesia causes measurable distress in newborns, and professional guidelines now strongly recommend pain control for the procedure. The two most effective local anesthetic techniques are dorsal penile nerve block (a small injection of lidocaine at the base of the penis) and ring block (an injection that encircles the shaft). A network meta-analysis covering multiple randomized trials found that both dorsal penile nerve block and ring block significantly reduced heart-rate spikes and crying during circumcision compared to no anesthesia or topical numbing cream alone.2Journal of Perinatology. Local anesthetic techniques for analgesia in neonatal circumcision: a network meta-analysis Topical lidocaine-prilocaine cream (commonly sold under the brand name EMLA) performed worse than either injection method for controlling pain during the procedure itself.
An earlier trial specifically measuring the dorsal penile nerve block found that infants who received the injection cried about half as much during circumcision compared to those who did not, and their heart-rate increase was at least half as large.3PubMed. Regional anesthesia during newborn circumcision. Effect on infant pain response The block was easy to administer and produced no significant complications. One tradeoff worth noting: the network meta-analysis found that dorsal penile nerve block carried a higher risk of small postoperative hematomas (bruising at the injection site) compared to topical cream.4Journal of Perinatology. Local anesthetic techniques for analgesia in neonatal circumcision: a network meta-analysis In practice, those hematomas are minor and self-resolving, so most providers consider the superior pain relief well worth it.
Pain management does not end with the local block. Many providers also recommend acetaminophen after the procedure and suggest a small amount of petroleum jelly on the wound with each diaper change to reduce friction and discomfort during healing.
Gomco Versus Plastibell
The Plastibell is the Gomco’s most common alternative in the neonatal period. It works differently: a plastic ring is tied onto the foreskin, cutting off blood supply, and the ring falls off on its own after several days. Each device has a distinct complication profile, and the research paints a surprisingly mixed picture depending on which complications you care about most.
A controlled trial in Saudi Arabia comparing over 400 Gomco and nearly 400 Plastibell cases found that Plastibell had less immediate bleeding, while Gomco had fewer of almost everything else. Penile swelling affected roughly one in ten Plastibell patients, and about one in twenty experienced the ring migrating upward on the shaft. Infection and leftover redundant skin were also more common with Plastibell.5PubMed Central. A controlled trial of Gomco versus Plastibell for neonatal circumcisions in Saudi Arabia The authors concluded that Gomco was associated with fewer overall complications despite a higher rate of post-procedure bleeding.
A large retrospective study looking at overall complication rates, emergency visits, and follow-up healthcare use found no significant difference between the two techniques for complications, interventions needed, or hospital visits. The one exception was that Plastibell patients were more likely to show up at an emergency department or urgent care, possibly because the dangling plastic ring alarms parents during the days before it drops off.6PubMed. Gomco vs. plastibell office circumcision: No difference in overall post-procedural complications and healthcare utilization
When it comes to wound healing, a trial comparing three techniques (Gomco, Plastibell, and conventional dissection) found that all Gomco patients achieved satisfactory healing, compared to about 94% of Plastibell patients, though the difference was not statistically significant. The Plastibell group, however, was more likely to report moderate pain even with analgesia.7PubMed Central. Wound Healing and Cosmetic Outcomes in Neonatal Circumcision Using Three Different Techniques
Gomco Versus Mogen
The Mogen clamp is a simpler-looking instrument, essentially a flat shield with a slit through which the foreskin is pulled and then excised. It has no bell and does not cover the glans during the cut, which makes the procedure faster but requires more confidence from the operator to avoid injury.
A randomized trial (the “GoMo study”) directly compared newborn pain responses between the two devices. Mogen circumcisions were about twice as fast, averaging under four minutes versus about seven minutes for Gomco. Infants in the Gomco group had higher postoperative heart rates and blood pressure, and their cortisol levels spiked more, all consistent with a more stressful experience during the procedure. There were no differences in bleeding complications. Maternal satisfaction was virtually identical for both methods, landing above 98%.8PubMed. The GoMo study: a randomized clinical trial assessing neonatal pain with Gomco vs Mogen clamp circumcision
Despite those advantages, the Mogen clamp has largely fallen out of favor in many U.S. hospitals. Several high-profile cases of glans injuries led to product-liability litigation, and the original manufacturer stopped producing the device. Some providers still use Mogen clamps sourced from other manufacturers, but many institutions have shifted toward the Gomco or Plastibell as a precaution. The Gomco’s bell physically shields the glans throughout the procedure, which provides an inherent safety margin that the Mogen design lacks.
Age and Weight Limits
The Gomco clamp was designed for newborns, and most guidelines recommend performing the procedure in the first few weeks of life. Traditional cutoffs have been approximately three months of age or about 5.5 kilograms (roughly 12 pounds) of body weight, beyond which many providers transition to surgical circumcision under general anesthesia. An older study concluded that use of the Gomco clamp beyond early infancy carried substantial morbidity and recommended alternative methods for older patients.9PubMed. Gomco circumcision: When is it safe?
More recent data, however, has pushed back on that threshold. A 2023 study found that Gomco circumcision in the office setting was safe in patients older than three months and heavier than 5.5 kilograms, with less than a 1% higher risk of bleeding compared to the standard newborn window. No patient in that study required general anesthesia or a blood transfusion to manage the extra bleeding, though unexpected follow-up visits were more frequent in the older and heavier group.10PubMed. Gomco circumcision in the office in patients heavier than 5.5 Kg and/or older than 3 months The researchers argued that broadening the age and weight criteria could reduce costs for families who would otherwise need to pay for an operating room and anesthesia team. This is an evolving area, and some institutions still enforce the traditional cutoffs while others have relaxed them based on this newer evidence.
For older children and adults, the Gomco clamp is not considered appropriate. The tissue is thicker and more vascular, the anatomy is larger, and the clamp was not engineered for that scale. Older patients typically undergo formal surgical circumcision with sutures under anesthesia.
Complications Worth Knowing About
No surgical procedure is complication-free, and circumcision is no exception. Complications fall into two broad categories: things that happen right away and things that show up weeks, months, or even years later.
Immediate complications are uncommon and usually minor. Bleeding is the most frequent early problem, reported in a small percentage of cases. An Iraqi case series recorded a total complication rate of about 9% across neonates and older infants, with bleeding being the single most common issue (accounting for roughly a third of all complications), followed by excess residual skin and infection. The complication rate was lowest in neonates and climbed in older infants.11Iraqi Journal of Medical Sciences. GOMCO CLAMP CIRCUMCISION IN NEONATES AND INFANTS: A PRELIMINARY EXPERIENCE IN IRAQ Proper technique reduces most of these problems: ensuring the clamp is left in place long enough to achieve hemostasis (usually around five minutes), selecting the correct bell size, and maintaining a sterile field.
Late complications can surface well after the wound has healed. A large series examining children operated on for problems resulting from previous neonatal circumcision found that about 5% of the initial cohort eventually needed a secondary procedure. The most frequent late issues included penile adhesions (where healing skin sticks to the glans), skin bridges, meatal stenosis (narrowing of the urethral opening), redundant or uneven residual foreskin, and buried penis.12PubMed. Late complications of newborn circumcision: a common and avoidable problem A separate review from a pediatric dermatology practice catalogued skin bridges, adhesions, concealed penis, and epidermal inclusion cysts as the most characteristic late skin-related complications.13PubMed. Dermatological complications of circumcision: lesson learned from cases in a pediatric dermatology practice
Many late complications are related to how much foreskin was removed or how aftercare was handled rather than the clamp itself. Gentle retraction of any remaining inner foreskin during diaper changes, keeping the area clean, and attending follow-up appointments can catch adhesions early before they become firm skin bridges requiring surgical correction. A thorough preoperative evaluation, including screening for bleeding disorders and anatomic anomalies like hypospadias, is critical for prevention.14PubMed Central. Complications of circumcision The Gomco clamp should not be used on an infant with any penile anomaly that might require the foreskin tissue for a future reconstructive procedure.
Parental Satisfaction and Cosmetic Outcomes
Because circumcision is elective, parental satisfaction is one of the most practical outcomes to measure. A prospective study of 710 newborns (about three-quarters Gomco, one-quarter Plastibell) found that overall satisfaction was high for both methods, with parents rating the outcome as excellent or good in about 96 to 97% of cases regardless of technique. Parents perceived fewer complications with Gomco than with Plastibell, and they reported less postoperative pain with Gomco. On the other hand, Gomco accounted for a larger share of the cases that parents rated as cosmetically unsatisfactory.15PubMed. Newborn circumcision outcomes: are parents satisfied with the results?
A more recent randomized trial of 190 infants reinforced the satisfaction gap. Only about 8% of parents were dissatisfied after Gomco circumcision, compared to 28% after Plastibell. Bleeding was more common after Plastibell in that study, while excess residual skin was more common after Gomco.16PubMed. A prospective randomized controlled trial measuring satisfaction and parents stress after Gomco and Plastibell infant circumcision The cosmetic complaint most often raised about Gomco results is uneven or slightly excess inner mucosal skin, which can give the circumcision a less “clean” look during the first weeks of healing. In many cases this resolves on its own as the swelling subsides, but in some it requires a minor revision.
Reusability and Cost in Different Settings
Unlike the Plastibell, which is a single-use disposable plastic ring, the Gomco clamp is a durable metal instrument that can be sterilized and reused many times. This makes a meaningful cost difference in settings where budgets are tight. One review from a Nigerian institution noted this reusability as a key advantage for resource-limited environments.17Sub-Saharan African Journal of Medicine. Experience with Gomco Clamp circumcision in male neonates: technique and review of the literature A Zambian study evaluating all three major devices found that the Gomco produced the highest rate of surgically acceptable outcomes at about 94%, and framed neonatal circumcision broadly as a cheaper and more cost-effective approach than waiting and performing the procedure later in childhood or adulthood.18University of Zambia. A study of the outcome of neonatal male circumcision using Gomco, Mogen and Plastibell neonatal devices among trained providers in Zambia
Proper sterilization is, of course, essential with any reusable surgical instrument. The clamp must be fully disassembled, cleaned, and autoclaved between patients. Inspecting the bell and plate for pitting, corrosion, or warping is important because a damaged clamp can compress tissue unevenly. Many hospitals retire Gomco clamps after a set number of uses or at the first sign of surface degradation.
Training and Simulation
A Gomco circumcision looks straightforward on paper, but the procedure has more steps and more potential for user error than it appears. Correctly sizing the bell, adequately separating the inner foreskin from the glans before inserting the bell, and applying even pressure with the screw arm are all learned skills. Errors at any step can lead to incomplete foreskin removal, uneven cuts, or injury to the glans.
Structured training programs have demonstrated clear improvements. A pediatric residency curriculum showed significant increases in both knowledge test scores and comfort levels after a formal circumcision training module, and trainees also shifted their attitudes toward consistently using anesthesia during the procedure.19PubMed. Neonatal circumcisions performed by pediatric residents: implementation of a training program More recently, simulation-based training using anatomical models has become a standard part of residency education. One pilot program found that all participants, whether trained in person or virtually, were able to perform more than three-quarters of their simulation and clinical circumcisions independently after completing the course. Every participant in that study chose to use the Gomco clamp after finishing their training.20PubMed Central. CIRCumcision learning experience using simulation: A pilot learning platform for safe neonatal circumcision training offered either virtually or in person
Another simulation study with 53 interns found that participants unanimously reported the session improved their confidence and helped them identify areas for targeted improvement before performing the procedure on an actual newborn.21PubMed Central. Neonatal Circumcision Simulation: A Resource for Beginners For parents wondering about their provider’s experience, asking how many circumcisions they have performed and whether they trained on a simulation model before working with patients is a reasonable question.
Where Policy Stands
The American Academy of Pediatrics issued its most recent policy statement on circumcision in 2012, concluding that the preventive health benefits of newborn circumcision outweigh the risks of the procedure. Specific benefits cited included reduced risk of urinary tract infections, HIV acquisition, certain sexually transmitted infections, and penile cancer. The statement stopped short of recommending routine circumcision for all newborns, instead emphasizing that families should receive unbiased information and make the decision based on their own values and preferences.22PubMed. Male circumcision The American College of Obstetricians and Gynecologists and the American Urological Association endorsed the same position.23PubMed Central. Neonatal circumcision: new recommendations & implications for practice
The policy does not specify which device to use. From a clinical standpoint, device choice is left to the provider’s training and institutional protocol. Some hospitals stock only one type of clamp; others allow the practitioner to choose. If you have a strong preference for one technique over another based on what you have read, it is worth discussing with your provider before delivery, since not every practitioner is trained on every device and switching on the day of the procedure may not be practical.