Split flexor pollicis longus tendon transfer to A1 pulley for correction of paralytic Z deformity of the thumb.

PURPOSE: To test the hypothesis that split flexor pollicis longus (FPL) transfer to the A1 pulley will correct a thumb paralytic Z deformity and that the transfer can be subjected to early postoperative active mobilization protocol. METHODS: In a prospective trial, 19 consecutive thumbs with ulnar or combined ulnar and median nerve paralysis received split FPL transfer to the thumb A1 pulley and active mobilization of transfer after 48 hours. Outcomes were assessed by correction of Z deformity during pinch, tendon transfer insertion pullout during early active mobilization, range of motion at the thumb metacarpophalangeal and interphalangeal joints, and postoperative treatment time. Data from historical records of 20 thumbs with split FPL to extensor pollicis longus (EPL) and 3 weeks' immobilization, treated before the prospective trial in the same institution, were used for comparison. RESULTS: All 19 thumbs with split FPL to A1 pulley achieved Z deformity correction at discharge from rehabilitation. There was no incidence of transfer insertion pullout during active mobilization, and patients were discharged 22 days earlier than the controls who received transfer of FPL to EPL insertion. Seventeen thumbs were available for follow-up more than 1 year after the index procedure. Fifteen thumbs retained deformity correction, and 2 had recurrence of Z deformity. The interphalangeal joint had considerably greater active motion following split FPL to A1 pulley compared with transfer of split FPL to EPL insertion. CONCLUSIONS: This study supports the hypothesis. Split FPL tendon transfer to thumb A1 pulley can correct paralytic thumb Z deformities and be mobilized early for transfer re-education. Improved interphalangeal joint active motion and reduced treatment time are added advantages over FPL transfer to the EPL insertion. TYPE OF STUDY/LEVEL OF EVIDENCE: Therapeutic III.

Correction of the claw hand.

Intrinsic paralysis can be the manifestation of a variety of pathologic entities (stroke, cerebral palsy, Charcot-Marie-Tooth, muscular dystrophy, leprosy, trauma, cervical disease, and compressive and metabolic neuropathies). Patients present with a spectrum of clinical findings dependent on the cause and severity of the disease. The 3 main problems caused by intrinsic weakness of the fingers are clawing with loss of synchronistic finger flexion, inability to abduct/adduct the digits, and weakness of grip. Clawing is defined as hyperextension of the metacarpophalangeal joints and flexion of the interphalangeal joints. This article describes the clinical evaluation and surgical treatment options for claw hand.

Claw-finger correction in leprosy using half of the flexor digitorum superficialis.

The commonest paralytic deformity in leprosy is the claw deformity of the fingers. Many surgical procedures have been described and are practiced to correct this deformity, but none is free from complications. A modification of the Zancolli lasso operation in which only half of the flexor digitorum superficialis tendon of the middle finger was used as the motor is described and a comparative study of this and the conventional procedure was carried out in 70 hands in 70 patients. The results suggest that the modification is technically simpler, with comparable results to those of the conventional procedure and fewer complications.

Assessment of results of opponensplasty.

One hundred and fifty-six opponensplasties carried out on 115 patients at Anandaban Hospital between 1987 and 1997 were reviewed. In most cases a flexor digitalis superficialis opponensplasty was performed. The outcome was assessed by measuring the finger to which the thumb could obtain a pinch grip, the gap between the thumb and little metacarpophalangeal joints, and the satisfaction of the patient. The objective assessments demonstrated excellent or good results in 89%. Good or fair patient satisfaction was obtained in 93%. Early complications were seen in seven cases (4%). Objective measurements of outcome and patient satisfaction were not always in agreement, indicating that objective measures do not adequately assess the success of surgery from the patient's perspective. We thus conclude that subjective measurements of results are an important measure of success and should be included in the evaluation of surgical results.

Comparative evaluation of effectiveness of different motor muscles in modified lasso procedure for correction of finger clawing.

A retrospective study was carried out to compare the effectiveness of different muscles as motors in modified lasso procedures for correction of finger clawing in leprosy. It was observed that palmaris longus and extensor carpi radialis longus were more suitable than the flexor digitorum superficialis. In some patients, removal of superficialis is associated with complications which could not be predicted before surgery. Extensor carpi radialis longus has advantages over palmaris longus in selected cases.

The metacarpophalangeal stabilization test: its surgical interest.

If the fingers of the claw hand are stabilized in order to prevent over-extension of the metacarpophalangeal joints, the long extensors will fully extend both interphalangeal joints. Based on the proximal interphalangeal stiffness assessed by this test, a simple therapeutic plan is proposed for the choice of the appropriate techniques for palliative claw hand surgery.

A modification of the surgical correction of the thumb--a long term follow up.

A modification of the commonest surgical procedure to restore Abduction-Rotation using the flexor superficialis transfer with Y-insertion is described. The modification consists of doing a triple insertion at the thumb instead of Y-insertion. After introducing the triple insertion the procedure shows 80-90% or more good results, whereas 50% or more failures are reported in the existing literature, when a Y-insertion only is used which cannot safely prevent 'Z' deformity. 60 cases were followed up.

Correction of ulnar claw hand by a loop of flexor digitorum superficialis motor for lumbrical replacement.

The current dynamic procedures for correction of ulnar claw hand are extensor carpi radialis longus many tail graft, palmaris longus four finger many tail graft and extensor by pass operation. Each of these procedures takes a minimum of one and a half hours and needs extensive post operative re-education and training. These procedures employ a graft of plantaris tendon, fascia lata or extensor tendon, with the disadvantages of operating at another site and adhesion of grafts. The procedure described in this article obviates these disadvantages. The operation is simple to perform and has given good results even when performed at leprosy camps where no extensive re-education physiotherapy was available. This operation also tends to correct the reversal of transverse arch. The technique and observations are discussed in detail.