Biomedical subjects

Graham A Hamilton

Publications and source records attributed to Graham A Hamilton.

9 recordsLinked to original sources

PubMed2004

Naviculocuneiform arthrodesis.

NC arthrodesis is a useful procedure to alleviate pain secondary to arthritis or collapse of the medial longitudinal arch. Fusion of this joint provides stabilization of the medial column and is often used in conjunction with other flatfoot-correcting procedures to restore normal function to the foot. Because the NC joint is the center of the lever arm of the foot and is therefore subject to bending-moment stress, concomitant gastrocnemius recession or tendo-Achillis lengthening is recommended.

Achilles Tendon↗

PubMed2003

External fixation of the foot and ankle. Elective indications and techniques for external fixation in the midfoot.

Although external fixation is widely used for treatment of fractures, limb deformities, and bone lengthening; use of external devices is still evolving. Elective cases for treatment of the midfoot and published research on external fixation specifically for surgical treatment of midfoot pain and deformity are scarce. Indications for elective external fixation in the midfoot are limited because rigid internal fixation in this area is relatively easy and successful. This article discusses podiatric conditions that can be treated advantageously by external fixation when elective surgery is done. The article also describes methods of external fixation appropriate for podiatric surgical reconstruction in patients with these conditions.

Arthrodesis↗

PubMedDate not supplied

Modified lapidus arthrodesis: rate of nonunion in 227 cases.

Several studies of Lapidus arthrodesis have commented on the rate of nonunion (ranging from 3.3% to 12.0%), although these figures are based on relatively small patient populations. This study retrospectively reviewed the medical records and radiographs of 211 consecutive patients (32 men, 179 women; mean age, 46.9 years) who received modified Lapidus arthrodesis for forefoot pathology in 227 feet. In all cases, the procedure was performed using joint curettage with subchondral plate preservation and screw fixation. Patients remained nonweightbearing for 6 to 8 weeks and were monitored for a minimum of 6 months postoperatively. Nonunion was seen in 12 (5.3%) of the 227 feet that underwent modified Lapidus arthrodesis.

Adolescent↗

PubMedDate not supplied

Pseudoaneurysm after modified Lapidus arthrodesis: a case report.

Pseudoaneurysms are a pulsatile swelling secondary to an arterial-wall defect. Blood flows through the defect but is contained within the surrounding soft tissue. This article describes a rare form of an iatrogenic pseudoaneurysm of the perforating deep plantar artery 1 month after a modified Lapidus arthrodesis for hallux valgus. A presumptive diagnosis of pseudoaneurysm was confirmed by Doppler ultrasonography. The patient was treated with ligation of the artery and resection of the pseudoaneurysm and remained free of symptoms 1 year postoperatively.

Aneurysm, False↗

PubMedDate not supplied

Salvage of the neuropathic foot by using bone resection and tendon balancing: a retrospective review of 10 patients.

Medical records were retrospectively reviewed for 10 patients (mean age, 48.7 years) who had a chronic, recurrent neuropathic forefoot ulceration or osteomyelitis in the presence of an abnormal metatarsal parabola. Two patients had multiple lesser metatarsal osteomyelitis, 3 patients had chronic ulceration in the presence of an abnormal metatarsal parabola, and 5 patients had previous lesser ray resection or metatarsal head resection. None of the patients had signs of skin breakdown under the first metatarsal. All of the patients were treated with a combination gastrocnemius recession, peroneus longus to peroneus brevis tendon transfer, and resection of the second through fifth metatarsal heads to decrease plantar forefoot pressure and preserve the first ray without increasing the risk of ulceration under the first metatarsal head. All patients achieved a healed plantigrade foot without ulcer recurrence, transfer callus development, or contralateral foot breakdown at a mean follow-up of 14.2 months. Postsurgical complications consisted of dehiscence of various incision sites on 3 individual patients and one local reaction to antibiotic-impregnated beads. This preliminary study suggests that this combination of reconstructive procedures may provide an alternative method of foot salvage to panmetatarsal resection and transmetatarsal amputation.

Adult↗

PubMedDate not supplied

Mortality and morbidity after transmetatarsal amputation: retrospective review of 101 cases.

Medical records were reviewed for 90 patients (101 amputations) (mean age 64.3 years, range 39 to 86 years) who underwent transmetatarsal amputation (TMA). The mean follow-up period, excluding those patients who either died or went on to a more proximal amputation less than 6 months after TMA, was 2.1 years. Patients were examined for any postoperative complications associated with TMA. Complications were defined as hospital mortality occurring less than 30 days postoperatively; stump infarction with or without more proximal amputation; postoperative infection; chronic stump ulceration; stump deformity in any of 3 cardinal planes; wound dehiscence; equinus and calcaneus gait. An uncomplicated outcome was defined as the absence of all these complications and an ability to walk on the residuum with a diabetic shoe and filler after a minimum follow-up of 6 months. The chi(2) tests of association were used to determine whether diabetes, a palpable pedal pulse, coronary artery disease, end-stage renal disease, cerebral vascular accident, or hypertension were predictive of or associated with healing. A documented palpable pedal pulse was a predictor of healing (P = .0567) and of not requiring more proximal amputation (P = .03). End-stage renal disease predicted nonhealing (P = .04). A healed stump was achieved in 58 cases (57.4%). Postsurgical complications developed in 88 cases (87.1%). Two patients died within 30 days postoperatively. These data suggest that TMA is associated with high complication rates in a diabetic and vasculopathic population.

Adult↗

PubMedDate not supplied

Morbidity associated with high gastrocnemius recession: retrospective review of 126 cases.

To evaluate morbidity associated with surgical lengthening of the gastrocnemius, medical records were reviewed retrospectively for 126 patients (mean age, 49.7 years; range, 8-78 years) who had undergone open gastrocnemius recession. Ten patients had isolated recession; 116 had gastrocnemius recession with an additional foot or ankle procedure on the ipsilateral limb. During a mean follow-up period of 19 months (range, 6-50 months), all patients were examined for any postoperative complications associated with the recession. Complications were defined as the presence of postoperative infection, wound dehiscence, nerve problems, decreased muscle strength, scar problems, or calcaneus gait (overlengthening). Uncomplicated outcome was defined as absence of all these complications and return to regular activity, both occurring during a follow-up of at least 6 months. Postsurgical complications developed in 9 (6%) of the 126 patients: 6 (4%) had scar problems, 2 (1.33%) had wound dehiscence, 2 (1.33%) had infection, 3 (2%) had nerve problems, and 1 (0.67%) developed complex regional pain syndrome. No patient complained of either a limp or gait disturbance. Neither persistent decrease in muscle strength nor calcaneus gait was seen. These data suggest that the open gastrocnemius recession procedure has low associated morbidity.

Adolescent↗

PubMedDate not supplied

Fracture dislocations of the tarsometatarsal joints: Analysis of interrater reliability in using the modified Hardcastle classification system.

Fracture dislocations/subluxations of the tarsometatarsal joint are complex injuries that are often misdiagnosed. Prompt recognition and treatment of Lisfranc injuries decrease the likelihood of long-term sequelae. The original (1909) classification system was modified in 1982 and again in 1986. The 1986 classification system, developed by Hardcastle et al, is used most widely in clinical practice and is cited most often in the biomedical literature. For this-or any-classification system to be beneficial, however, multiple observers must be able to use it in a consistent manner, and a high level of interrater agreement should exist. This study examined interrater reliability among clinicians using the modified Hardcastle classification system for Lisfranc fracture dislocations. Thirteen Lisfranc injury radiographs were evaluated by 21 independent observers consisting of surgeons and residents (podiatric and orthopedic) as well as musculoskeletal radiologists, who classified radiographs according to the modified Hardcastle classification system. We used kappa statistics to evaluate the degree of interrater reliability for the entire group. A mean weighted kappa value of 0.54 was found for the group. Moderate interrater agreement was observed among clinicians interpreting the modified Hardcastle classification system for Lisfranc fracture dislocations.

Fractures, Bone↗

PubMedDate not supplied

Longitudinal tear of the tibialis anterior tendon.

Diagnosis and treatment of longitudinal tears of the tibialis anterior tendon are not well documented in the surgical literature. Described here is successful primary surgical repair of a longitudinally torn tibialis anterior tendon in a 60-year-old woman.

Female↗