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At least 55 records · Page 3Linked to original sources

Thumb's rule tested: visual angle of thumb's width is about 2 deg.

Measures of the size of various hand parts and their viewing distance when held at arm's length were made on one hundred and eighteen undergraduate students. A simple rule of thumb can be confirmed: Visual angle of the width of the thumb held at arm's length is about 2 deg. The thumbnail subtends about 1.5 deg and the index fingernail about 1 deg in width, when both are held at arm's length. These figures are good approximations for males and females, although a significant, direct, linear relationship exists between hand-part size and the visual angle of the part at arm's length.

Adult↗

Rodeo thumb: an unusual etiology of avulsion amputation of the thumb.

Though avulsion amputation of the thumb is a devastating hand injury, microsurgical techniques allow for immediate reconstruction and early restoration of function. The majority of these injuries occur in the workplace. An uncommon cause of thumb avulsion amputation is team roping. Recently, several individuals with such injuries presented and underwent successful replantation. Early perioperative venous thrombosis in one case led to secondary reconstruction with a delayed skin flap. Nonetheless, all patients have returned to full activity including team roping.

Adult↗

Arthrography as a method of diagnosing tear of the ulnar collateral ligament of the metacarpophalangeal joint of the thumb ("gamekeeper's thumb").

Arthrography of the metacarpo-phalangeal (MP) joint of the thumb was performed on 47 thumbs. The normal arthrographic appearance shows a closed joint space, whereas leakage of contrast material indicates tear of the joint capsule with or without an associated tear of a stabilizing ligament. Arthrographic demonstration of the heads of the adductor pollicis muscle was found to be specific for tear of the ulnar collateral ligament (UCL) of the MP joint, a tear which is commonly responsible for its instability. Arthrography is suggested as a safe and accurate diagnostic examination for the early detection of tears of the UCL of the MP joint.

Adolescent↗

Skier's thumb. Surgical treatment of recent injuries to the ulnar collateral ligament of the thumb's metacarpophalangeal joint.

Acute rupture of the ulnar collateral ligament of the metacarpophalangeal (MCP) joint of the thumb is often sustained in downhill skiing accidents an is hence called "skier's thumb." All complete ruptures seen at our hospital between 1975 and 1979 were operated using the "fishhook" pullout wire technique. Follow-up results 29 months after early operation are presented for 47 cases. The overall results are excellent in 29, good in 14, and fair in 3 patients. Our result had to be considered a failure. No patient had serious functional impairment or major constant pain. No patient took any pain medication. No reintervention was necessary. The distal bony avulsions showed the most favorable prognosis, and the ligamentous midsubstance tears, the least favorable. The fishhook pullout wire technique can be used in both ligamentous and bony avulsions of the ulnar collateral ligament and provides good or excellent results in 90% of the cases.

Athletic Injuries↗

Microsurgical toe to thumb transplantation for traumatic thumb loss.

Toe-to-thumb transfer was performed on 13 patients with traumatic thumb loss, using microvascular technique. Of those, 9 patients had industrial injury, 3 patients had a sharp cut injury and the remaining one had animal bite injury. The toes used for the transfer were the great toe(5), and the second toe(8). There were twelve successes, and one partial success. Ten patients have been followed-up for more than 12 months, and they are reviewed in detail. Total active motion after great toe and second toe transfer was 45 degrees and 68 degrees respectively. Static two-point discrimination was 10-15 mm in 10 patients. The donor foot did not suffer functionally. All of the patients returned to gainful employment postoperatively.

Adolescent↗

Clinical quiz. Rubinstein-Taybi syndrome (synonyms: broad thumbs and great toes, characteristic facies, and mental retardation -- broad thumb-hallux syndrome).

A 28-year-old mentally retarded, institutionalised woman was referred to us for evaluation of multiple plantar warts and ingrown nails of both great toes. The patient was born to unrelated parents of North African origin and had one brother and three half-brothers, all of whom were healthy. Physical examination revealed short stature, slight obesity, facial abnormalities (Fig. 1), short and broad thumbs and big toes (Figs. 2 and 3). A keloid was found on the right forearm, that had developed after surgical correction of a fracture (Fig. 4). Ill-defined hyperpigmented macules were observed on the trunk. The patient also presented pruritic eczematous lesions of the limbs and the back that had been present for some years and were recurrent despite treatment with emollients and local steroids. Androgenetic-type alopecia of moderate severity was seen on the vertex of the scalp. Past medical history included polydactylism of the feet and clinodactyly of the thumbs (both corrected surgically), respiratory tract infections, Wolf-Parkinson-White syndrome and refractive errors necessitating glasses.

Adult↗

[Thumb replacement operation using metacarpal distraction osteotomy as a secondary intervention after thumb amputation].

After thumb amputation distal to the MCP-1 joint, good results can be achieved with lengthening of the first metacarpal bone by an external fixateur if a correct technique is applied. In all our patients the lengthened thumb was mechanically stable and sensitive, thus improving the patient's ability to use the hand to grasp. Another advantage of this procedure is the relative simplicity of the method. Furthermore, the original nerve and vascular supply can be preserved.

Amputation, Traumatic↗

Primary toe-to-thumb transfer in the acutely avulsed thumb.

The case is presented of a primary toe-to-thumb transfer by microvascular anastomosis for reconstruction of an acute degloving amputation of the thumb. This approach is not recommended as the standard practice for this type injury, however, there were certain advantages in this patient: (1) one stage procedure, (2) restoration of length, sensibility, and cover, (3) cosmetic improvement, and (4) minimal length of hospitalization.

Adult↗

[Forum: reconstruction of the traumatic thumb. Toe as a donor site for reconstruction of the thumb].

One method of reconstruction of the thumb consists of microsurgical transfer of a toe. After a brief anatomical and technical review, the authors describe the various possibilities of thumb reconstruction using toe transfer: transfer of the 2nd toe, transfer of the great toe, partial toe transfers. Traumatic amputations must be distinguished from congenital amputations in terms of the indications for toe transfers. The indication for toe transfer in a case of traumatic amputation may be based on the level of amputation.

Amputation, Traumatic↗

[Forum: reconstruction of the traumatic thumb. Reconstruction of the thumb in a child by double transfer. Apropos of a clinical case].

The authors present a case of atypical thumb reconstruction in children, using a combined vascularized joint transfer and a free partial big toe transfer. They describe a burned hand with first metacarpal amputation and transproximal phalanx amputation of the index. According to the "bank finger" principle the metacarpophalangeal joint was transferred on the top of the first metacarpal, vascularized by the two collateral pedicles. The second metacarpal shaft was removed to create the first web and kept for bone grafting. A "wrap-around" flap (Morrison) with an intercalated bone graft completed this reconstruction. A first web orthesis was used to prevent retraction. Result at six months was functionally and cosmetically good, but the normal growth of the reconstructed thumb must be demonstrated by the future. Finally, the other procedures are considered.

Amputation, Traumatic↗

[Verification of thumb-specific muscles in a triphalangeal thumb with magnetic resonance imaging].

The presence of three phalanges in the first digit is considered to be a relatively rare congenital hand malformation. Six groups of this deformity can be distinguished: some digits are opposable, others resemble a non-opposable five-fingered hand. In cases of a hypoplastic thenar region with a restrained opposition, a clear verification of thumb-specific musculature has been hardly possible. We report of the possibility of a non-invasive identification of thumb-specific muscles by means of magnetic resonance imaging.

Adult↗

[Intersesamoid resection-suture of the metacarpophalangeal joint of the thumb. Sesamoidorrhaphy of the metacarpophalangeal joint of the thumb].

In some cases, congenital or acquired posterior instabilities of the MP joint of the thumb may cause pain or create functional disorders. It is possible to stabilize the metacarpophalangeal joint by partial resection of the ligament joining the two sesamoids which makes it possible to move and suture them toward each other. An enlargement plasty of the pulley then is required. This technique prevents hyperextension but without restricting flexion or opposition. The digital nerves must be carefully identified and protected.

Adolescent↗

[Forum: reconstruction of the traumatised thumb. Reconstruction of the amputated thumb by progressive lengthening of the 1st metacarpal using mini-fixator. Apropos of 2 clinical cases].

The authors report two cases of reconstruction of a mutilated thumb by progressive elongation of the first metacarpal without the need for bone grafts, using a minifixation elongation device, which is very easy to use. It allows distraction which can be performed by the patient himself and adjustment to the desired length, up to 40 mm.

Adult↗