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Biomedical subjects

T B Dameron

Publications and source records attributed to T B Dameron.

At least 19 recordsLinked to original sources
PubMed1996

Deep vein thrombosis in lumbar spinal fusion: a prospective study of antiembolic and pneumatic compression stockings.

We prospectively studied the incidence of deep vein thrombosis (DVT) of the thigh in 117 patients having posterior lumbar spinal fusion with instrumentation and bone grafting for degenerative disk disease or spondylolisthesis. Patients with neoplasm, infection, trauma, or history of DVT were excluded. Patients were randomized into two groups. In the operating room, group 1 patients were placed in thigh-high antiembolic compression stockings (TED hose), and group 2 patients were placed in antiembolic stockings and pneumatic compression stockings. In both groups, the stockings were used until discharge. Postoperatively, patients in both groups received 600 mg buffered aspirin twice daily. Comparative analysis of the two groups showed no difference in operative time, blood loss, number of levels of lumbar vertebrae fused, time to mobilization, weight, age, or sex. All patients had duplex scanning of the thigh postoperatively. No patient in the series was observed to have acute DVT by clinical examination or by ultrasonography.

Adult↗
PubMed1992

Jones fracture.

Explore the source record for details and available documents.

Ankle Injuries↗
PubMed1992

Displaced supracondylar humeral fractures in children. A comparison of results and costs in patients treated by skeletal traction versus percutaneous pinning.

Clinical outcome and treatment cost were compared in 65 children treated by either percutaneous pinning or skeletal traction for displaced supracondylar humeral fractures. Clinical outcome was evaluated by loss of elbow motion and change in carrying angle. Results of treatment were basically equivalent in the two groups and were satisfactory in 90% or more. To determine treatment cost, the authors analyzed factors that vary according to the type of therapy. Cost of treatment was lowest in those who had percutaneous pinning and subsequent pin removal in the office. Compared to this group, the cost of treatment increased by 23% in those who had percutaneous pinning and removal of the pins as a surgical procedure, by 117% in those treated by traction with the olecranon pin inserted in the emergency room, and by 142% in those treated by traction with the olecranon pin inserted in the operating room.

Bone Nails↗
PubMed1987

Displaced olecranon fractures in adults. Biomechanical analysis of fixation methods.

Four commonly used methods of internal fixation for displaced olecranon fractures were analyzed in a biomechanical model to determine strength of fixation. A transverse osteotomy in fresh cadaver specimens was internally fixed and was tested to failure by rapid loading. Screw plus wire in combination provided the greatest strength of fixation. Energy to failure averaged 31.0 Nm for cancellous screw, 32.0 Nm for figure-of-eight wire, 35.3 Nm for Arbeitsgemeinschaft fur Osteosynthesefragen (AO) tension band, and 39.4 Nm for screw-plus-wire combination. Comparison of screw and wire in combination to screw alone or to figure-of-eight wire demonstrated a significant difference (p less than 0.05). The difference between screw plus wire and AO tension-band fixation did not achieve statistical significance (0.2 greater than p greater than 0.1).

Biomechanical Phenomena↗
PubMed1987

Displaced olecranon fractures in adults. Clinical evaluation.

Displaced fractures of the olecranon in adults were analyzed for pain, function, range of motion, and roentgenographic appearance. With one exception, the 38 transverse or oblique fractures were treated by reduction and internal fixation. Results were best in the group treated by screw plus wire in combination (average rating, 17.7 points). Other ratings averaged 17.2 for the intramedullary screw, 16.8 for figure-of-eight wire, and 16.7 for Arbeitsgemeinschaft fur osteosynthesefragen (AO) tension-band wire. Factors associated with poorer results included postoperative displacement or malreduction greater than or equal to 2 mm and articular involvement greater than or equal to 60%. Symptomatic metal prominence was particularly common after AO tension-band wiring, occurring in 80%. All seven comminuted fractures were treated by primary excision. The one comminuted fracture with greater than or equal to 60% articular involvement that was treated by excision had a poor result because of instability.

Adolescent↗
PubMed1983

Intramedullary migration of a bone plate and screws. A case report.

Intramedullary migration of an internal fixation device was noted in a 61-year-old woman, 56 years after treatment of a fractured femur. Gross, histologic, and metallurgic findings served to explain the disintegration of the metal plate and screws. The "migration" of the plate and screws is a manifestation of normal bone growth and demonstrates the remarkable potential for internal remodeling of bone.

Biodegradation, Environmental↗
PubMed1981

Humeral shaft fractures in adults.

After evaluating the results of treatment of 100 humeral shaft fractures in adults, we found the simplest, most comfortable, and most satisfactory treatment to be that of a sling and coaptive splinting. In all of the 15 patients who had radial nerve injury, the fracture occurred in the distal half of the humerus. Every patient recovered full radial nerve function. At follow-up, almost all patients who were treated nonoperatively were found to have between 3 degrees and 12 degrees of increased internal rotation of the arm, with a corresponding decrease in external rotation. None of the patients had recognized this change before being informed of it. Less than 25 degrees of angulation caused no functional impairment. The fractures were usually clinically united before eight weeks. All of the seven fractures that took longer than six months to heal occurred in the proximal half of the humerus. Three patients accepted nonunion rather than have surgical treatment. All three had oblique fractures in the proximal third of the humerus; two were helped by a brace. The preferred surgical treatment of delayed union or nonunion is secure internal fixation supplemented with autogenous bone grafting.

Adult↗
PubMed1980

Untreated ruptures of the anterior cruciate ligament. A follow-up study.

Fifty patients (fifty-three knees) with surgically verified ruptures of the anterior cruciate ligament were evaluated at an average of ten years after injury. There was a high incidence of anterior laxity, rotatory instability, and meniscal tears at follow-up. The roentgenographic incidence of osteoarthritis at follow-up was low. Patients who had regained normal thigh circumference had better results than those with thigh atrophy. Although few of the patients felt that the knee was completely normal, 72 per cent of the patients returned to strenuous sports and 47 per cent felt that they had no restrictions because of the knee. This study of untreated ruptures may provide a baseline for evaluation of procedures to repair or reconstruct the anterior cruciate ligament.

Adolescent↗
PubMed1979

Adamantinoma of the appendicular skeleton.

Adamantinoma is a slowly developing tumor originating in the bones of the extremities and containing cells that resemble amelioblasts but do not produce enamel. Anamantinoma's clinically and histologically benign appearance is deceptive, for the recurrence rate is high unless surgical extirpation is complete. Thus, aggressive surgical excision of the involved area of bone should be performed at the time of diagnosis. Allograft substitution may be an effective alternative to amputation.

Adolescent↗
PubMed1975

Surgical treatment for nonunion of the scaphoid.

Fracture of the scaphoid is the most common injury of the carpal bones. Most scaphoid fractures heal after immobilization. When the fracture does not unite, degenerative arthritic changes and disability may occur. Twenty-four symptomatic nonunions treated surgically were reviewed. Based on presence of union, percent of normal motion, and patients' symptoms, results were rated good in 19 cases and fair in five. Nine of ten patients treated with bone grafting and styloidectomy had union of fractures with good results. All five patients with bone grafting and internal fixation had union. Excision of proximal fragments of more than one third to one half of the scaphoid, and internal fixation alone, had unsatisfactory results. A styloidectomy should excise approximately one half of the radius articulating with the scaphoid. If not enough styloid is excised, osteophytic overgrowth will occur; if too much is excised, the carpus will sublux radially.

Adolescent↗