Video-assisted functional assessment of index pollicisation in congenital anomalies

Outcome After Pollicization for Congenital Thumb Deficiency: A Cohort Study of Cases in a Single Unit, 1987 to 2016

PURPOSE

To investigate the functional and aesthetic outcomes in a cohort with pollicizations performed due to congenital anomalies in our hospital.

METHODS

From 1987 to 2016, we performed pollicizations in 32 hands of children aged 1 to 8 years (median, 2 years). We followed-up on 31 of the hands from 1 to 31 years (median, 10 years) after the procedure. The participants and their caregivers self-assessed their function and appearance with visual analogue scales and patient-reported outcome measures (Patient-Reported Outcomes Measurement Information System Pediatric Upper Extremity; the short version of the Disability of Arm, Shoulder and Hand Outcome Measure; and EQ-5D-3L). We examined the hands with regard to motion, strength, sensitivity, and function.

RESULTS

There were 2 complications and 6 reoperations. Participants with mild anomalies (radial longitudinal deficiency Bayne type N/0 to 2) had better subjective and objective hand function than participants with severe anomalies (radial longitudinal deficiency Bayne type 3-4, ulnar dimelia, 5-finger hand). Hands with preoperatively near-normal index fingers had, in most cases, good thumb opposition and pinch, and hands in both groups benefited from the creation of a cylinder grip. Grip and pinch strength were lower than reported in cohort studies where an additional opponensplasty had been performed.

CONCLUSIONS

Hands with severe congenital anomalies also benefited from the procedure. We recommend a simplified follow-up program to identify cases where additional surgeries to enhance strength should be considered during growth of the child.

TYPE OF STUDY/LEVEL OF EVIDENCE

Therapeutic IV.

Pollicization in the treatment of congenital severe hypoplasia and aplasia of the thumb: a systematic review

Pollicization of the index is the treatment of choice for severe hypoplasia and aplasia of the thumb. After a historical overview, we present a systematic review of this procedure. The main steps of this procedure were reported by Dieter Buck-Gramcko in 1971 and are still relevant nowadays. Many refinements have been described over the last decades by different surgeons to address limitations related to bone stock, musculotendinous structures and skin incisions. However, considering the complexity of this procedure and the results in the literature, the functional and esthetic outcomes can still be improved thanks to basic research. Pollicization of the index is rarely done and is one of the most demanding surgical procedure in hand surgery.

Global assessment of pollicization outcomes: an analysis in 27 patients

Outcomes measurements after pollicization remains difficult due to the lack of a standardized assessment protocol. This study reports our experience of a global assessment of pollicized thumbs that includes a specific questionnaire for subjective evaluation, a detailed clinical assessment focused on functional outcomes incorporating function and usage of the pollicized thumb. Twenty-seven patients completed the questionnaire, and nine hands were clinically evaluated by a multidisciplinary team composed of hand surgeons and occupational therapists. Subjective evaluations revealed that 24 patients would recommend pollicization. Clinical evaluations revealed that only four out of nine patients properly integrated their pollicized thumb during bimanual activities; however, occupational therapy input allowed the children to compensate for the lack of strength and other difficulties. We propose the use of this global assessment package to analyse function and usage at various capacities, which can be useful for the surgeon, child and parents.Level of evidence: IV.

[Pollicization in the management of congenital hypoplasias and aplasias of the thumb, functional results, about 13 cases]

INTRODUCTION

Pollicization of the index finger as a treatment for aplasia and severe congenital thumb hypoplasia remains a demanding surgical procedure. In aplasias, it is generally well-accepted, less in hypoplasias. However, it is often the only solution to give back to the child the possibilities of a pollici-digital grip, guaranteeing an excellent function of the hand. We decided to evaluate the long-term results of this intervention.

MATERIAL AND METHODS

We reviewed all children operated of index pollicization for a congenital aplasia or hypoplasia of the thumb between 2006 and 2018. The evaluation was performed with a specialized reeducator. The analytical and functional characteristics of the neo-thumbs were evaluated, as well as the consequences on the daily life of the child.

RESULTS

Thirteen pollicisations were performed on 10 patients. The mean age at surgery was 21 months (10; 43). It was a Blauth stage IIIB in 1 case, IV in 5 cases, and V in 7 cases. Seven children, and eight hands, could be evaluated. The average postoperative follow-up was 6.5 years. The mean age at the examination was 7.7 years (3.3, 12.1). The mean Percival score was 18 out of 22. The adapted video-assisted scoring system had an average score of 11 out of 14. Children described a momentary psychosocial discomfort for 5 of them, and still present in 3 of them.

CONCLUSION

The pollicization of the index finger in congenital aplasia or severe hypoplasia (stage IIIB and IV) of the thumb remains for us the only way to create a sensitive thumb, mobile, with satisfactory strength and appearance, and to bring a normal function of the hand. The evaluation of our functional results are good to very good in the majority of patients, and show the benefits give by this intervention.