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Biomedical subjects

T A el-Gammal

Publications and source records attributed to T A el-Gammal.

8 recordsLinked to original sources

Metacarpal hand: classification and guidelines for microsurgical reconstruction with toe transfers.

Metacarpal hand refers to the hand that has lost its prehensile ability through amputation of all fingers with or without amputation of the thumb. Functional restoration can be achieved by a wide variety of microvascular toe transfer techniques. When deciding which procedure should be used, careful consideration must be given to the level of amputation of the fingers as well as the functional status of the remaining thumb. In this article we propose a classification for the various patterns of the metacarpal hand along with guidelines for selection of the proper toe transfer procedure.

Adult↗

The lateral arm fascial free flap for resurfacing of the hand and fingers.

The lateral arm free flap can be harvested as a fascial flap or fasciocutaneous flap. In this report we describe the use of the lateral arm fascial flap for degloving injuries of the fingers and for skin loss on the dorsum of the hand with exposure of tendons and bones. Concomitant reconstruction of a missing phalanx with a portion of the distal humerus is also described. The use of the fascial flap allows a large area of tissue to be harvested, and still, the donor site can be closed primarily. The fascia is thin and pliable and so conforms well to the contour of the fingers. Its bulk does not interfere with finger motion, and its undersurface creates a gliding surface for tendons. Complications in the reported cases were negligible.

Adolescent↗

Toe-to-hand transfer for traumatic digital amputations in children and adolescents.

In the period from July of 1990 to August of 1994, 45 toe or toe tissue transfers were performed in 28 children and adolescents with traumatic amputation of digits. The average age at the time of transfer was 12 years (range, 3 to 16 years), and the median age was 10 years. The methods of reconstruction included transfer of 6 trimmed great toes, 2 great toe pulps, 24 second toes, 1 vascularized metatarsophalangeal joint from the second toe, 2 third toes, 4 combined second and third toes. and 1 combined third and fourth toes. All of the transferred toes, except one second toe, ultimately survived. Exploration and reanastomosis were required in three cases owing to arterial insufficiency. Partial pulp loss occurred in two digits. Follow-up ranged from 1 to 5 years (average, 3 years). Bony union occurred uneventfully in all patients. Two-point discrimination averaged 5 mm (static) and 6 mm (moving). Active range of the motion averaged 69, 38, and 13 degrees at the metaphalangeal proximal interphalangeal and distal interphalangeal joints of the reconstructed fingers, respectively, and 15 degrees at the interphalangeal joint of the reconstructed thumbs. None of the children required subsequent tenolysis. Pulp plasty was performed in nine digits in seven patients. Radiologically, the transferred phalanges showed the some growth as the non-transferred ones. Trimming the great toe before transfer did not result in premature physeal closure or growth retardation. The donor foot maintained a satisfactory appearance. None of the patients complained of difficulty in running or jumping. Toe-to-hand transfer in children, performed meticulously, can provide a valuable option for reconstruction of traumatic digit loss.

Adolescent↗

Toe-to-hand transfer. Current concepts, techniques, and research.

The current status of toe-to-hand transfer at the Chang Gung Memorial Hospital is presented. Various combinations of toe-to-hand transfers have been used routinely for reconstruction of lost digits as well as parts of the digits distal to the sublimis insertion. Early, one-stage reconstruction is recommended in patients with clean wounds when replantation is not feasible. The decision of which technique to be used in certain patients is highly individualized. Technical refinements have been introduced aimed at simplifying the technique of toe harvesting and improving the function and appearance of the reconstructed digits as well as donor sites. Aggressive motor rehabilitation and sensory re-education are essential for optimal functional recovery. Current research projects involve evaluation of patients using the computerized work simulator, gait analysis, and somatosensory evoked potentials. Morphometric studies of the digital nerves in the fingers and toes have been performed to determine the effect of neurotization upon the degree of sensory recovery.

Amputation, Traumatic↗

Motion after metacarpophalangeal joint reconstruction in rheumatoid disease.

The outcome of reconstruction of the rheumatoid metacarpophalangeal joint may deteriorate with time, especially with respect to active motion. This study assesses active finger motion after crossed intrinsic transfer and Swanson implant arthroplasty at increasing durations of follow-up to determine the effect of time. In a total of 58 patients, 21 hands had the crossed intrinsic transfer operation and 49 had the arthroplasty. Follow-up time averaged 6 years for the crossed intrinsic transfers and 21 months for the arthroplasties. Measurement of metacarpophalangeal, proximal interphalangeal, and distal interphalangeal joint active motion at each follow-up interval were analyzed by the univariate repeated measures analysis of variance method. After crossed intrinsic transfer the overall average active range of motion decreased significantly (18 degrees) at the metacarpophalangeal joint. Proximal interphalangeal and distal interphalangeal average range of motion significantly increased during the first 5 years as a result of increases in flexion. After implant arthroplasty, the overall average metacarpophalangeal range of motion analysis at the different follow-up intervals showed that the metacarpophalangeal average range of motion significantly increased during the first 2 years and then gradually declined through the duration of follow-up. Active proximal interphalangeal flexion was also significantly increased during the first 2 postoperative years. The effects of metacarpophalangeal joint reconstruction on active finger joint motion are related to the duration of postoperative follow-up; this concept should be considered when one is planning metacarpophalangeal joint reconstruction in rheumatoid patients.

Arthritis, Rheumatoid↗

Anatomy of the oblique retinacular ligament of the index finger.

The available literature includes conflicting descriptions of the anatomy and function of the oblique retinacular ligament. We have studied this ligament in the index finger to better define its presence, configuration, points of attachment, length, and relationship to the proximal interphalangeal joint axis. Twenty fresh frozen index fingers were dissected. Five additional specimens were decalcified, mounted, sectioned transversely at 1 mm intervals and studied under the microscope. An oblique retinacular ligament was identified on the radial side of the index finger in 95% and on the ulnar side in 90% of the specimens. The radial oblique retinacular ligament was usually longer and more developed than the ulnar oblique retinacular ligament. Proximally, the ligament arose from the middle third of the proximal phalanx and the A-2 pulley whereas, distally, it inserted into the lateral extensor band with a fan-shaped expansion centered 4 to 6 mm distal to the proximal interphalangeal joint line. In 70% of the specimens, the oblique retinacular ligament was supplemented by a contribution from the proximal cruciform pulley (C-1). Histologic cross sections also confirmed the presence of the oblique retinacular ligament but not the supplemental contribution arising from the C-1 pulley. The relationship of the oblique retinacular ligament to the proximal interphalangeal joint axis is dependent on the proximal interphalangeal joint position; the ligament lies palmar to the proximal interphalangeal joint axis only when the proximal interphalangeal joint is flexed.

Cadaver↗

Digital periarterial sympathectomy for ischaemic digital pain and ulcers.

Digital periarterial sympathectomy was performed on 11 digits in three patients with chronic digital ischaemia which was a manifestation of either Raynaud's disease, C.R.E.S.T. syndrome or traumatic ulnar artery thrombosis. Before operation, all patients had pain in the affected fingers and five digits had ulcers, two of which were infected. Using the operating microscope, the adventitia was stripped circumferentially over the distal 2 cm. of the common digital arteries, the bifurcation and the proximal 1 cm. of the proper digital arteries distal to the bifurcation. The same procedure was repeated, at the wrist level, for the ulnar artery and/or the radial artery and its dorsal branch. Follow-up ranged from three to 16 months. After two weeks, all patients reported relief of pain and the ulcers were progressively healing. By three months, all ulcers had healed.

Adolescent↗