Digital replantation in children

Principles and Practice in Pediatric Vascular Trauma: Part 2: Fundamental Vascular Principles, Pediatric Nuance, and Follow-up Strategies

As of 2020, penetrating injuries became the leading cause of death among children and adolescents ages 1-19 in the United States. For those patients who survive and receive advanced medical care, vascular injuries are a significant cause of morbidity and trigger notable trauma team angst. Moreover, penetrating injuries can lead to life-threatening hemorrhage and/or limb-threatening ischemia if not addressed promptly. Vascular injury management demands timely and unique expertise, particularly for pediatric patients. In part 1 of this review, we discussed the scope and extent of the epidemic of traumatic vascular injuries in pediatric patients, reviewed current evidence and outcomes, discussed various challenges and advantages of a myriad of existing team structures, and outlined potential outcome targets and solutions. However, in order to optimize care for pediatric vascular trauma, we must also understand the fundamental best practice principles, surgical options and approaches, medical management, and recommendations for ongoing, outpatient follow-up. In part 2, we will address the best evidence, combined with expert consensus, regarding strategies for diagnosing, managing, and ongoing follow-up of vascular trauma, with particular focus on the nuances that define the unique approaches to pediatric patients. LEVEL OF EVIDENCE: n/a.

Postoperative Interventions in Pediatric Digital Replantation: A Tertiary Referral Center Case Review

PURPOSE

Although a few case series have been published describing the excellent outcomes of replantation and revascularization operations in children, there has been limited study of the hospital course that these patients experience and the number of potentially harmful interventions and treatments that occur. The purpose of this study was to detail the results of various postoperative interventions, including anticoagulation, transfusion, leeching, sedation, and additional anesthetic exposures.

METHODS

Twenty-nine patients aged less than 18 years had 34 digital revascularizations or replantations performed between January 2000 and May 2020. The details of each patient's presentation, surgery, and postoperative care were analyzed.

RESULTS

Nine of 29 children underwent repeat anesthetics, including 6 revision amputations. No demographic, surgical, or postoperative variables consistently preceded revision amputation or additional anesthetic procedures. Only 5 patients had >1 hemoglobin (Hb) measurement. Two patients received blood transfusions; the average drop in Hb was 3.5 g/dL from before surgery to the lowest after surgery. Four patients underwent leech therapy. Only patients receiving leech therapy required postoperative transfusions. Anticoagulation regimens were prescribed on the basis of demographic and surgical factors, although no medication or regimen seemed to affect outcomes.

CONCLUSIONS

Although the experience of digital replantation is essentially the same in pediatric patients as adults, there may be different ramifications for children. Specifically, postoperative management of pediatric digital replantation or revascularization can involve multiple interventions that carry their risks. Parents should be counseled about the risks of anticoagulants, transfusions, and repeat anesthetics, and clinicians should monitor Hb closely when using leech therapy.

TYPE OF STUDY/LEVEL OF EVIDENCE

Therapeutic IV.

Pediatric Digit Replantation Following Traumatic Amputation: Nationwide Analysis of Patient Selection, Outcomes, and Cost

Background: Indications for replantation following traumatic digit amputations are more liberal in the pediatric population than in adults, but delineation of patient selection within pediatrics and their outcomes have yet to be elucidated. This study uses a national pediatric database to evaluate patient characteristics and injury patterns involved in replantation and their outcomes. Methods: The Healthcare Cost and Utilization Project Kid's Inpatient Database was queried for traumatic amputations of the thumb and finger from 2000 to 2012. Participants were separated into those who underwent replantation and those who underwent amputation. Patients undergoing replantation were further divided into those requiring revision amputation and/or microvascular revision. Patient age, sex, insurance, digit(s) affected, charges, length of stay, and complications were extracted for each patient. Results: Traumatic digit amputations occurred in 3090 patients, with 1950 (63.1%) undergoing revision amputation and 1140 (36.9%) undergoing replantation. Younger patients, those with thumb injuries, females, and those covered under private insurance were significantly more likely to undergo replantation. Cost, length of stay, and in-hospital complications were significantly greater in replantation patients than in those who had undergone amputation. Following replantation, 237 patients (20.8%) underwent revision amputation and 209 (18.3%) underwent vascular revision, after which 58 required revision amputation. Risk of revision following replantation involved older patients, males, and procedures done recently. Conclusions: Pediatric patients who underwent replantation were significantly younger, female, had thumb injuries, and were covered by private insurance. Our findings demonstrate that in addition to injury factors, demographics play a significant role in the decision for finger replantation and its outcomes.

Survival Rate of Limb Replantation in Different Age Groups

Revascularization of damaged limbs/digits is technically feasible, but indications for surgical replantation remain controversial. The authors analyzed the survival rate of upper limb amputations and the associated factors in different age groups. They grouped 371 limb/digit amputees (average age, 44 years; range, 2-85 years) treated in their hospital during the past 10 years into three groups based on age (young, ≤ 15 years, n  = 12; adult, 16-64 years, n  = 302; elderly, ≥ 65 years, n  = 57) and analyzed their injury type (extent of injury and stump status), operation method, presence of medical complications (Charlson comorbidity index), and survival rate. There were 168 replantations, and the overall replantation survival rate was 93%. The Charlson comorbidity index of the replantation patients was 0 in 124 cases; 1 in 32; 2 in 9; and 3 in 3, but it did not show any significant difference in survival rate after replantation. Eight elderly patients (14%) did not opt for replantation. Younger patients tended to undergo replantation, but they had lower success rates due to their severe injury status. The results of this study show that the survival rate of replantation in elderly patients is equal to that in adults. Stump evaluation is important for survival, but the presence of medical complications is not associated with the overall survival rate.

Digit replantation in children: a nationwide analysis of outcomes and trends of 455 pediatric patients

BACKGROUND

The short-term outcomes of pediatric digit replantation have been derived primarily from single-center/surgeon experience. The purpose of this study was to conduct a nationwide analysis of outcomes and trends of pediatric digit replantation as compared to adult patients.

METHODS

Digit replantation patients were identified in the 1999-2011 Healthcare Cost and Utilization Project, Nationwide Inpatient Sample. Outcomes included in-hospital procedure-related and total complications, microvascular revision, amputation, and length of stay (LOS). Univariate and multivariate analyses were performed to compare pediatric and adult patients and to identify independent predictors of outcomes. The annual rate of replantation among pediatric digit amputation patients was evaluated over the study period.

RESULTS

A total of 3,010 patients who underwent digit replantation were identified, including 455 pediatric patients. For all replantations, age ≤18 years was associated with a lower likelihood of suffering a total complication (odds ratio (OR) 0.66, P = 0.006), requiring amputation (OR 0.62, P < 0.001), and experiencing LOS >5 days (OR 0.77, P = 0.019), after adjusting for comorbidity, amputation severity, digit type, number of replantations, and hospital characteristics. Similar associations were observed between patient age and replantation outcomes for single-finger replantations. The rate of pediatric replantation (range 16 to 27 %) remained consistent through the study period (incidence rate ratio 0.98, P = 0.06).

CONCLUSIONS

The rate of pediatric replantation has been relatively low, being 27 % at most in a given year. Importantly, short-term outcomes are better in children than for adults, supporting the indication to perform replantation in this age group when the surgeon feels that replantation is feasible and safe.

Replantation or revascularisation injuries in children: incidence, epidemiology, and outcome

We studied the epidemiology, incidence, and outcome among children and adolescents admitted for possible replantation or revascularisation of an injured upper extremity during the period 1998-2008. Twenty-nine patients with 38 finger injuries were admitted. Eight of the 29 had a severe amputation injury. The annual rate of all amputations in the referral area of 300,000 children was 0.42/100,000 children/year and total amputation injuries 0.18/100,000 children/year. Most injuries occurred in patients aged 12-15 years. The survival after total amputations was 6/14 and after subtotal amputations 13/15. Mean total active movement after replantation was 84° (n = 5) and after revascularisation 152° (n = 10). Four patients were re-examined in the outpatient department and nine answered a questionnaire. Cold intolerance was reported by most of the patients. Patients' satisfaction with outcome of treatment was good.

Patterns of surgical care and health disparities of treating pediatric finger amputation injuries in the United States

BACKGROUND

Digital amputation in children is a very strong indication for replantation, but little is known about the epidemiology and distribution of care for pediatric finger amputation injuries in the United States. The specific aims of this study were to examine trends in the surgical management of pediatric finger amputation injuries in the United States from 2000 to 2006, and to identify potential treatment disparities among various demographic groups.

STUDY DESIGN

Data from the 2000, 2003, and 2006 Healthcare Cost and Utilization Project Kids' Inpatient Database were used to identify discharge records containing at least one ICD-9-CM procedure code corresponding to digit amputation or replantation. National estimates were generated using weighted frequency calculations, and a weighted logistic regression model was used to examine the influence of various demographic factors on treatment.

RESULTS

There were 1,321 weighted discharge records that satisfied our inclusion criteria. From 2000 to 2006, the rate of attempted digit replantation for pediatric finger amputation injuries has remained stable at approximately 40%. The majority of injuries were treated at nonchildren's (86%) and teaching (76%) hospitals; 52% of digit replantations were performed at hospitals with a volume of 1 to 2 digit replantations per year. We found that blacks (odds ratio [OR] 0.47), Hispanics (OR 0.37), and children without insurance (OR 0.38) were less likely to receive attempted replantation (all p < 0.05), even after controlling for potential confounding factors.

CONCLUSIONS

The proportion of pediatric digit amputation injuries managed by replantation remained stable between 2000 and 2006. Whites and children with private health insurance were more likely to receive replantation than blacks, Hispanics, and children without health insurance, even after controlling for confounding factors.

Revascularization of complete and incomplete distal finger amputations in children below 2 years of age: a report of three cases

Three cases of fingertip amputation at the level between the distal phalanx and the nail base in children below 2 years of age were treated by replantation or revascularization. The injury was complete in two, and incomplete in one. All three fingerstips survived with artery anastomosis without the need for a blood transfusion. In two venous anastomosis failed and venous drainage was achieved by 3-hourly pinprick. Survival of an amputated finger can be expected in cases where venous reconstruction is not possible, provided that there is adequate venous drainage.

A single-institution experience of hand surgery litigation in a major replantation center

BACKGROUND

Bellevue Hospital Medical Center is a level 1 trauma center in New York and a major referral center for complex hand injuries and amputations. These injuries typically occur at the workplace and are thought to be highly litiginous in nature. This study was conducted to analyze the cases involving hand surgery litigation related to trauma over the last 8 years at this institution.

METHODS

The authors performed a retrospective chart review of all claims filed against Bellevue Hospital Medical Center after treatment for a hand injury during 2001 to 2009. Twenty-three patients in total were identified and reviewed for age, mechanism/type of injury, complications, decision to replant, average time after injury to post claim, and whether settlement was obtained.

RESULTS

One of 23 patients who filed suit against Bellevue Hospital Medical Center received a successful settlement involving an incident surrounding the loss of a nonreplantable part. Of 168 patients in whom 219 replantations/revascularizations were performed, five patients filed claims, all surrounding a failed attempt. In total, there were seven complications: five failed replants, one failed thenar flap, and one patient who needed a revision completion amputation.

CONCLUSIONS

The majority of the patients who filed claims did so because of the decision not to replant. Only 2.98 percent (five of 168) of all attempted revascularization/replantation patients filed claims against the authors' institution; all claims were notably dropped. The legal system appears to support physicians and institutions that treat these complex injuries. Better patient understanding of the decision-making process and complications involving treatment of traumatic hand injuries may decrease the number of future lawsuits.

Fingertip replantation at or beyond the nail base in children

Although success of digital replantations in children has been reported by many authors, the very distal fingertip replantation remains technically demanding. The aim of this article is to review our experience with fingertip replantations at or distal to the nail base in pediatric patients and evaluate the clinical outcomes. From October 2000 to May 2007, 12 pediatric fingertips amputated at or distal to the nail base were replanted. Only one artery was anastomosed for revascularization with or without nerve repair; vein drainage was provided by the controlled bleeding technique. Eleven of the 12 replants (91%) survived; one replant of crushed digit failed. An average of 26 month (range, 6 to 36 months) follow-up revealed excellent restoration of finger motion and appearance. The regained static 2-point discrimination (S2PD) sensation was from 3.2 to 5.0 mm (mean, 4.2 mm). Both the parents and the children were satisfied with the final results. In conclusion, fingertip replantation in children allows good functional and esthetical recovery and should be attempted if technically feasible.

Foster replantation of fingertip using neighbouring digital artery in a young child

Reconstruction of an amputated fingertip in a young child demands special techniques for success. We report a 2.5-year-old female patient with an amputated left index fingertip with the vascular defect being too severe to perform the usual replantation. Comparing several methods, we used the neighbouring digital artery as the feeding artery to perform foster replantation. Finally, the patient was satisfied with the appearance and function of her fingers. The clinical case, techniques, results are described and discussed. We consider it a useful technique, especially for those with a rather severe vascular defect.

PATIENT

A 2.5-year-old girl suffered a crush amputation of the left index fingertip. Only the flexor tendon of the amputated fingertip was connected to the proximal finger tissue and the blood supply was completely lost (Figure 1).

METHODS

The distal amputated fingertip was fixed using Kirschner wire under general anaesthesia. Then, microsurgery operation was carried out immediately to replant this amputated fingertip. Both ulnar and radial digital arteries were avulsed, while the dorsal vein was intact and the digital nerve was also surviving. The integrity of blood vessels was too traumatised to connect to the proximal part. In the case of the distal part of the ulnar artery of the injured index finger, the blood supply was established by anastomosing the distal end of the amputated tip and the radial artery of the middle finger, which was the feeding artery (Figure 2). A 11/0 nylon suture was used. The dorsal vein and digital nerve were repaired by means of microsurgical anastomosis. The wound was covered with the dorsal skin of the middle finger and the palmar skin of the index finger to form a skin pedicle, and then, immobility of the two fingers was maintained to prevent avulsion.

RESULT

The index tip obtained good blood supply and survived completely (Figure 3). Detachment of the index and middle finger was performed after 3 weeks, and both of the fingers showed good blood supply (Figure 4). The appearance and function of the index and middle fingers were satisfactory 3 months postoperatively.

Replantation in the pediatric hand

Replantation in the pediatric hand is not an uncommon procedure, and it is 1 of the most common microsurgical operations in children. Microsurgeons should be aware of the indications and technical issues involving pediatric patients because there are differences compared to adult patients. In general, pediatric patients can be approached in a liberal and aggressive manner, but they tend to be more technically challenging. This review attempts to describe the various considerations in dealing with these patients to provide a framework for surgical management. Based on a survey of the literature, replantation has been a successful procedure in the pediatric population and has become a mainstay of treatment because it provides a better functional and aesthetic outcome.

Reconstruction of circulation in the fingertip without vein repair in zone I replantation

PURPOSE

In fingertip replantation, adequate venous drainage is important for success. As the level of amputation becomes more distal, anastomosis of veins becomes more technically difficult. External bleeding is a common solution to venous congestion, but the process is burdensome because of duration of bleeding for 3 or more days after surgery. We present a new technique for reconstructing circulation without vein anastomosis in zone I replantation and analyze the outcomes of this technique in terms of eliminating external bleeding and of a high survival rate of the replanted digits.

METHODS

Between 1997 and 2007, we performed 120 replantations in 112 patients (83 male and 29 female; mean age, 33 years; range, 3-54 years). All were zone I amputations, based on the Tamai classification. We surgically repaired both proper digital arteries, excluded the vein, and then ligated 1 of the arteries. Using this technique, circulation was restored. Included in the outcome evaluation were 91 digits in the 87 patients (mean age, 35 years; range, 14-54) who returned for outcome assessments 12 months after surgery.

RESULTS

Of 120 digits replanted, 115 digits survived, corresponding to an overall success rate of 96%. No patients received alternative means to alleviate venous congestion, such as leeches or other means of external bleeding. Nearly all of the 87 patients (91 digits) were satisfied with the results of the replantations.

CONCLUSIONS

Our technique reconstructs circulation without vein anastomosis in zone I replantation. This alternative to venous congestion involves a simple surgical procedure and straightforward postoperative care. Follow-up assessments of a series of 120 replantations show that the majority of zone I replantations led to satisfactory function. We therefore propose this technique as an effective method for zone I replantation.

TYPE OF STUDY/LEVEL OF EVIDENCE

Therapeutic IV.

Fingertip injuries

Fingertip injuries are a potential cause of significant morbidity within the workplace and the community. Although they account for a low proportion of ED presentations, importantly they can frequently be managed entirely by emergency staff. A literature review was undertaken to identify the epidemiology, the assessment process and the management options for fingertip injuries as relevant to emergency medicine.

Pediatric upper extremity replantation

The evolution of microsurgical technique has led to increasing success with pediatric replantation. The broader inclusion criteria for pediatric replantation, together with the greater technical demands of repair and the less favorable mechanism of pediatric amputations (crush-avulsion), yield a slightly lower overall survival rate than in adults. The superior nerve and soft tissue regenerative capacity of children appears to produce better functional outcomes. Nonetheless, the issue of cosmesis and developing self-image in a child may have ramifications beyond a simple calculus of range of motion and strength variables--hence the imperative that microsurgical salvage be attempted in pediatric upper-extremity amputations.