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Common peroneal nerve injuries: results with one-stage nerve repair and tendon transfer.

The authors report their experience in the treatment of common peroneal nerve (CPN) injuries using a one-stage procedure of nerve repair and tibialis posterior tendon transfer. A series of 45 patients with traumatic injury and graft repair of the CPN is presented. From 1988 to 1991, the six patients elected for surgery had only nerve repair: five ultimately did not recover, while muscle contraction in the remaining patient was graded M1-2. Since 1991, nerve surgery in our clinic was associated with tendon transfer procedures (39 cases) which were followed by a satisfactory reinnervation rate. Nerve transection and iatrogenic injuries, torsion/dislocation of the knee, complex biosseous fractures of the leg, and gunshot wounds showed excellent to fair results in decreasing order: in nerve sections, muscle recovery scored M3 or M4+ in all the patients, and in nerve ruptures due to severe dislocation of the knee, it was M3 or M4+ in 85% of cases. The association of microsurgical nerve repair and tendon transfer has changed the course of CPN injuries.

Adult↗

The use of the pathokinesiology laboratory to select muscles for tendon transfers in the cerebral palsy hand.

One hundred nine cerebral palsy hands referred for consideration for tendon transfers were examined clinically and by dynamic electromyography. Wire electromyography as used in gait analysis at the author's institution was employed in each of these cases. Most patients required transfers for release (opening) of the hand. The flexor carpi ulnaris and brachioradialis were the most common muscles active in release, yet even in those muscles, less than half were suitable for transfer. This suggests that the wire electromyogram is helpful in selecting the proper muscle for tendon transfer in the cerebral palsy hand.

Arm↗

The modified Robert Jones tendon transfer in cases of pes cavus and clawed hallux.

This is a retrospective study of the modified Robert Jones tendon transfer in 24 patients and 28 feet. The main indication for the procedure was to correct symptoms related to clawing of the hallux in seven patients, relieve pressure under the head of the first metatarsal in 13 patients, and treat for both symptoms in three patients. One patient had diffuse ache in the arch. Fifteen patients had idiopathic cavus feet, of whom five had associated spina bifida occulta. The remainder had a variety of different etiologies including cerebral palsy, head injury, brain abscess, and spinal cord tethering. Postoperative follow-up ranged from 7 months to 33 years with an average of 5 years and 6 months. The modified Robert Jones tendon transfer was shown to be effective in relieving symptoms related to clawing of the hallux in 90% of patients but was not reliable in curing pain under the first metatarsal head, with success in only 43% of patients. In three patients, pain under the metatarsal head was relieved initially but recurred by 18 months. Complications were frequent. Six patients developed pain under the tip of the hallux postoperatively.

Adolescent↗

Tibialis anterior tendon transfer for residual dynamic supination deformity in treated club feet.

Twenty-seven previously treated club feet in 25 patients were evaluated retrospectively following tibialis anterior tendon transfer to the dorsum of the foot to correct residual dynamic supination deformity. In 11 feet, the transfer was combined with additional soft tissue and or bony procedures to treat other accompanying deformities. Electrophysiologically demonstrated peroneal weakness causing muscle imbalance contributed to the etiology of this dynamic deformity. At follow-up, none of the patients had dynamic supination deformity during ambulation. All showed active contraction of the transferred tibialis anterior tendon. There was no case of overcorrection. Functional and cosmetic results were assessed by parents and surgeons as being excellent. Tibialis anterior tendon transfer is recommended to correct residual dynamic supination deformity and to restore muscle balance after satisfactory correction of idiopathic club foot contractures.

Child↗

Tendon transfers for radial and median nerve palsies.

Paralysis or irreparable injury to the radial or median nerve results in considerable impairment of hand function that directly affects activities of daily living. Radial nerve loss prevents wrist and digit extension, which hinders object acquisition and release. Median nerve loss deprives the hand of thumb function, especially opposition, which impedes prehension. Tendon transfers to restore function are indicated when nerve recovery is no longer expected. Tendon transfer can re-establish active movement and enhance function. The maximum benefit after tendon transfer, however, requires a close working relationship among patient, therapist, and physician. This article will highlight the surgical principles and rehabilitative process to achieve this goal.

Humans↗

Tendon transfers for the treatment of irreparable rotator cuff defects.

Certain defects of the rotator cuff musculotendinous units cannot be repaired. If restoration of strength is an important treatment goal, then tendon transfers must be considered for palliation. In this article, the anatomical and physiological bases for tendon transfers are discussed, and currently known results with this form of treatment are reviewed.

Humans↗

Split posterior tibial tendon transfer for varus deformity of hindfoot.

Sixteen patients (23 feet) who underwent split posterior tibial tendon transfers were evaluated. The patients were seen on a followup basis for a minimum of 1 year postoperatively. The causes were spastic cerebral palsy in 13 feet, spastic-athetoid cerebral palsy in 3 feet, hydrocephalus in 3 feet, and other diseases in 4 feet. The indication for surgery was varus deformity during the stance phase of gait and increased varus deformity during the swing phase of gait because of spasticity of the posterior tibial muscle. Heel cord lengthening was done on 17 feet. Preoperative and postoperative gaits were evaluated while the patients were walking. Axial radiographs of the calcaneus and the tibia were taken of all patients while they were weightbearing. There were 15 excellent, 6 good, and 2 poor results. The poor ratings were assigned to patients who had recurrence of varus deformity; there were no cases of overcorrection. Split posterior tibial tendon transfer was effective for treating spastic varus deformity of the hind part of the foot. This treatment also could be considered for a patient with spastic-athetoid cerebral palsy, if the deformity was determined to be caused by overactivity of the tibialis posterior muscle.

Adolescent↗

Split posterior tibial tendon transfer for spastic equinovarus foot deformity.

This paper describes a simplified technique for split posterior tibial tendon transfer in the treatment of spastic equinovarus deformity of the foot. Thirteen children with spastic equinovarus foot deformities were treated at Children's Rehabilitative Services in Phoenix, Arizona, from 1983 to 1986. The technique was modified in 10 of the 13 patients by attaching the split posterior tibial tendon more proximally to the peroneus brevis, compared to a more distal attachment as described by other authors. The mean length of followup was 21 months. Eleven patients obtained a good or excellent result. Two patients were considered to have a fair result. No poor results or complications were noted in any of the patients. It was felt that the split posterior tibial tendon transfer was an effective procedure for correction of spastic equinovarus as reported by other authors. Modification of the technique significantly simplifies the operation by requiring less dissection while still producing favorable results.

Adolescent↗

The long-term results of the surgical management of paralytic pes cavus by soft tissue release and tendon transfer.

Twenty-six patients with paralytic pes cavus were managed by early soft tissue correction and tendon transfer. Eighteen had spina bifida, 6 had peroneal muscular atrophy and two had cerebral palsy. The most frequent operations were flexor hallucis longus tenodesis, Girdlestone's flexor to extensor tendon transfer and plantar release. The indications for these procedures are discussed and the results presented, with particular reference to static and dynamic foot pressure studies performed at review. Follow-up averaged 5.2 years. Toe correction was found to be successful in most cases but plantar release failed in 55% of feet, with many progressing to fusion. Many failed feet had presented at an earlier age and it was felt that the initial procedures had delayed the need for bony correction thus minimising growth disturbance.

Adolescent↗

Extensor digiti minimi tendon transfer to correct abducted small finger in ulnar dysfunction.

A tendon transfer to correct the abducted posture of the small finger in patients with ulnar nerve dysfunction is described. The extensor digiti minimi is transferred deep to the extensor digitorum communis tendon or junctura tendinae to the small finger and inserted into the radial portion of the extensor hood, correcting the muscle imbalance. Successful results in 10 patients are reported.

Female↗

Fiber length variability within the flexor carpi ulnaris and flexor carpi radialis muscles: implications for surgical tendon transfer.

PURPOSE: The purpose of this study was to understand the detailed architectural properties of the human flexor carpi radialis (FCR) and flexor carpi ulnaris (FCU) muscles and their implications for tendon transfer surgery. METHODS: Muscle fiber length was measured in 6 separate regions of the FCU and FCR from 10 cadaveric specimens. Sarcomere length was measured by laser diffraction for normalization. Moment arms were estimated by measuring tendon excursion with respect to joint angle. The position of entry of the motor nerve branches into each muscle also was measured to establish limits for the safe length of muscle mobilization. RESULTS: Muscle fiber length varied significantly along both the FCU and FCR. Fiber length variability in the FCU was twice that of the FCR. Although the average fiber length for both muscles across all regions was similar (62.6 +/- 2.1 mm for the FCR and 63.1 +/- 4.0 mm for the FCU), the proximal fibers of the FCU were longer compared with the proximal fibers of the FCR and the distal fibers of the FCU were shorter compared with the distal fibers of the FCR. The 99% confidence interval for the second nerve branch entry into the muscles was located approximately 69 mm distal to the medial epicondyle for the FCU and approximately 73 mm distal for the FCR. CONCLUSIONS: These data show different designs of both the FCU and the FCR. The functional significance of fiber length variability is not clear but imply that, when used in tendon transfer, the properly mobilized FCU has a much greater excursion.

Cadaver↗

Ulnar nerve compression following flexor digitorum superficialis tendon transfers around the ulnar border of the forearm to restore digital extension: case report.

This case report describes a complication that occurred following long and ring finger flexor digitorum superficialis tendon transfers routed around the ulnar border of the forearm to restore digital extension. An ulnar mononeuropathy developed in the early postoperative period that was characterized by decreased ring and small finger sensation and interosseous muscle weakness. Operative exploration demonstrated extrinsic compression of the ulnar nerve by the long and ring finger flexor digitorum superficialis tendons. When superficialis tendon transfers are chosen to restore digital extension, passage around the radial side of the forearm or through the interosseous space are recommended to avoid this potential complication.

Adult↗

Tendon transfers for restoring hand intrinsic muscle function: a biomechanical study.

Four fresh-frozen arms were biomechanically tested to determine the effect of the route of tendon transfer (dorsal vs volar) and the site of digital tendon insertion (A1 pulley, A2 pulley, proximal phalanx, or lateral band/extensor mechanism) on restoring metacarpophalangeal joint flexion and interphalangeal joint extension. A volar carpal canal route of tendon transfer appears to be more mechanically efficient than a dorsal intermetacarpal route. A lateral band insertion provides a small but significant increase in proximal interphalangeal and distal interphalangeal joint extension.

Biomechanical Phenomena↗

[Traumatic partial paralysis caused by injury of the R. profundus nervi radialis. Nerve reconstruction and tendon transfer surgery].

Traumatic lesion of the deep branch of the radial nerve (posterior interosseous nerve) causes paralysis of the finger and thumb extension while wrist extension is maintained. There is no sensory disturbance. The lesion can be caused by knife injury, by Monteggia lesions and iatrogenically by procedures at the proximal radius. Traumatic disconnection of the posterior interosseous nerve is a good indication for early surgical exploration of the nerve; microsurgical reconstruction should then be carried out. When nerve repair has not been done or has been unsuccessful, finger and thumb extension can be achieved by various methods of tendon transfer. No transfer is necessary for the wrist. In two cases with fresh discission of the deep branch of the radial nerve (one after knife injury and one due to plate osteosynthesis of the radius) a microsurgical reconstruction was done. In two other cases with an old lesion after procedures on the proximal radius and unsuccessful nerve reconstruction a tendon transfer was done. In the two cases of acute microsurgical intervention the recovery was complete. In the two cases of tendon transfer good restoration of the finger and thumb extension was achieved.

Adolescent↗

Dynamic peroneus tendon transfer for repair of the unstable ankle.

The author considers the anatomic basis and indications for a dynamic peroneus brevis tendon transfer to treat ankle instability and pain caused by rupture of the lateral fibular ligaments. He describes the surgical technique. The peroneus brevis tendon is passed through a tunnel in the distal fibula and cuboid bone, proximally and deep to the belly of the short toe extensor muscle and is looped back and sutured to itself. Thirty-two patients with ankle instability and pain of 10 years' duration or acute ligamentous rupture underwent dynamic peroneus brevis tendon transfer in a prospective study between Nov. 1, 1976 and Oct. 31, 1981. Twenty-five of the 32 patients were available for follow-up, which ranged from 15 to 57 months. The operation resulted in improved activity in 80% and relief of pain in 76%. There were three complications: causalgia, infection and numbness in one patient each. The author believes this procedure is worthwhile in active individuals who have long-standing ankle pain and weakness due to rupture of the lateral ankle ligaments.

Adolescent↗