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Biomedical subjects

R Hathaway

Publications and source records attributed to R Hathaway.

7 recordsLinked to original sources
PubMed1996

3D computer data capture and imaging applied to the face and jaws.

There have been few attempts in the past at 3D computer modelling of facial deformity because of the difficulties with generating accurate three-dimensional data and subsequent image regeneration and manipulation. We report the application of computer aided engineering techniques to the study of jaw deformity. The construction of a 3D image of the mandible using a Ferranti co-ordinate measuring machine for data capture and the 'DUCT5' surface modelling programme for image regeneration is described. The potential application of this work will be discussed.

Analog-Digital Conversion↗
PubMed1994

Torsional strength of pin configurations used to fix supracondylar fractures of the humerus in children.

Supracondylar fractures of the humerus in children are commonly treated with closed reduction and percutaneous pin fixation. Using an adult human cadaver model, we measured the resistance to internal rotation of the distal fragment of simulated supracondylar fractures, fixed with four different configurations of pins. The maximum stability was provided by two crossed pins placed from the medial and lateral condyles. In comparison, the torque required to produce 10 degrees of rotation averaged 37 per cent less with use of two lateral parallel pins and 80 per cent less with use of two lateral crossed pins (p < 0.05 for both). The average torque required to produce 10 degrees of rotation with use of three lateral pins was 25 per cent less than with use of two medial and lateral crossed pins, although the difference was not significant.

Adult↗
PubMed1994

Mandibular vascular malformations: treatment and long-term results.

Two cases of intraosseous vascular anomalies of the mandible--including surgical treatment and 10-year follow-up--are reported. Early aggressive resection not only resulted in resolution of symptoms and restoration of facial symmetry but also exhibited significant osseous regeneration without grafting.

Arteries↗
PubMed1978

The Swan-Ganz catheter: a review.

Right heart catheterization, first reported in 1905, is now used for bedside assessment and management of the critically ill patient. A Swan-Ganz catheter and pulmonary artery pressure monitoring are the tools employed. In spite of the complications cited, the occurrence of hazard to the patient is infrequent. The catheter is particularly valuable in the hemodynamic evaluation of cardiac function. Right and left heart pump performance can be assessed by pressure measurements. The ability of the left heart to provide an adequate cardiac output can be numerically calculated, and its adequacy at a cellular level can be evaluated by determining arterial-venous oxygen saturation difference. One of the more important and newest uses of the Swan-Ganz catheter is the preventive function it plays in anesthesia administration. Implications of the Swan-Ganz catheter for nursing practice are: (1) explanation and support to patient and family; (2) technical understanding and knowledge of set-up; (3) care and maintenance of the catheter after insertion; (4) the understanding of physiologic principles underlying the use of the catheter; and, most important, (5) ability to correlate clinical observations and physiologic changes occurring in the patient with pressure measurements.

Cardiac Catheterization↗