PubMed Health⌕ Search

Biomedical subjects

T E Whitesides

Publications and source records attributed to T E Whitesides.

12 recordsLinked to original sources
PubMed1992

The force exerted by the halo pin. A study comparing different halo systems.

Seven different halo systems were evaluated biomechanically to compare the force exerted by the halo pin in each system. In three different experiments torque values of 2, 4, 6, 7, and 8 in lb were applied to the halo pin, and the force at the skull end of the halo pin was measured using a load cell. In the first experiment, the threads on the halo pin were dry, in the second experiment saline was applied to the threads on the pin, and in the third experiment cadaveric bone from the skull was interposed between the pin and the load cell. The results showed that for a given value of applied torque to the pin, the force exerted by the pin end varied widely according to the halo system and whether or not the pin was "lubricated."

Adult↗
PubMed1985

Surgical reconstruction of late post-traumatic thoracolumbar kyphosis.

Thirty-four patients underwent surgery for late post-traumatic thoracolumbar kyphosis. Indications for surgery included increasing kyphotic deformity, pain, or increasing neurologic deficit. Procedures included anterior spinal fusion only, posterior spinal fusion only, anterior and posterior fusions as staged procedures, and anterior and posterior fusions under the same anesthetic. Eighteen of the patients with anterior fusions also underwent decompression of the spinal cord by resection of the vertebral body. Stable fusion with halt in progression of deformity was obtained in 33 of the 34 patients by following basic biomechanical principles.

Adolescent↗
PubMed1985

The Mauch hydraulic knee unit for above knee amputation.

Hydraulic knee units provide a mechanical means of simulating normal gait in the above knee amputee. Sixty-one above the knee amputees were fitted with 70 Mauch SNS hydraulic knee units. Four of 60 patients rejected or were unable to use the hydraulic knee. Only one patient rejected the hydraulic knee unit for another design. Therefore, the rate of acceptance of the prosthesis was 93%. If inappropriate prescriptions for two triple amputees are omitted, the acceptance rate rises to 97%. A significant majority of patients stated that the hydraulic knee unit gave them a smoother gait, ability to change cadence, increased activity level, increased stability in stance phase, fewer falls, and less fatigue.

Adult↗
PubMed1985

Mauch S.N.S. hydraulic knee units in above-knee amputees. A long-term follow-up study.

From 1963 to 1980, 70 Mauch S.N.S. hydraulic knees were prescribed for 60 service-connected, above-knee amputees. The average length of the follow-up period was 7.5 years and the average age of the patient at the time of follow-up evaluation was 47 years. Four of the 60 patients who were given the Mauch S.N.S. units rejected them, for a success rate of 93%. Three of the four patients who opted for devices other than this unit had been given inappropriate prescriptions. Thus, the overall success rate for appropriately prescribed hydraulic knee units was 98.2%. Chart records were available on all patients in the series and 47 patients were available for direct survey, most of whom had used other prosthetic devices prior to receiving the Mauch unit. Survey results and clinical evidence have shown that the hydraulic knee unit is superior to the single-axis hinged device when appropriately prescribed. The hydraulic knee units are recommended for use in the active above-knee amputee who has a strong, relatively long stump and desires a variable cadence gait and more stability in stance, along with the consequent ability to increase activity level. These units are not recommended for use in the weakened, debilitated patient or in patients not willing to care for and maintain the devices.

Adult↗
PubMed1977

Traumatic kyphosis of the thoracolumbar spine.

The rationale of acute and chronic orthopedic management of traumatic throacolumbar kyphosis is determined by the type and location of the injury. The performance of laminectomy is condemned due to its historical failure in both the acute and chronic phase and its violation of simple mechanical principles.

Adult↗
PubMed1976

Acute hematogenous osteomyelitis complicating closed fractures.

Five cases of acute hematogenous osteomyelitis occurring at the site of closed fractures are reported. This is a serious and potentially lethal complication resulting in directly in the death of 3 of the 5 patients. This is an unusual occurrence seen infrequently, and subsequent delay in diagnosis is frequent. An awareness of this complication (which usually occurs in the face of decreased resistance to infection) coupled with careful inspection of the fracture site, evaluation of the patient as a whole, and a high index of suspicion will allow earlier diagnosis and possibly more successful early treatment. Because of the pathophysiology of this lesion and the usual delay in diagnosis, initial treatment should include wide surgical drainage of the abscess with proper debridement and bony resection. This may involve procedures which at first glance may appear to be mutilating. In these patients with decreased resistance to infection, the initial appropriate choice of antibiotics is essential.

Aged↗
PubMedDate not supplied

Tissue pressure measurements as a determinant for the need of fasciotomy.

An experimental and clinical tehcnique of measuring tissue pressures within closed compartments demonstrates a normal tissue pressure is approximately zero mmHg, and increased markedly in compartmental syndromes. There is inadequate perfusion and relative ischemia when the tissue pressure within a closed compartment rises to within 10-30 mm Hg of the patient's diastolic blood pressure. Fasciotomy is usually indicated, therefore, when the tissue pressure rises to 40-45 mm Hg in a patient with a diastolic blood pressure of 70 mm Hg and any of the signs or symptoms of a compartmental syndrome. There is no effective tissue perfusion within a closed compartment when the tissue pressure equals or exceeds the patient's diastolic blood pressure. A fasciotomy is definitely indicated in this circumstance, although distal pulses may be present. The measurement of tissue pressure aids in the early diagnosis and appropriate treatment of compartmental syndromes.

Aged↗