Biomedical subjects

T L Talbot

Publications and source records attributed to T L Talbot.

23 records · Page 2Linked to original sources

PubMed1980

Simple and microbiologically safe portable transport unit for patients requiring protected isolation.

The removal of a patient from a laminar air flow room during protected isolation poses the risk of his microbial contamination and infection. Nonetheless, temporary removal from the laminar air flow room may be necessary for certain medical procedures or for psychological relief during prolonged periods of isolation or both. A means for protecting patients during temporary removal from the laminar air flow room is highly desirable. A previously described total body garment has been shown to be microbiologically safe and effective, but is expensive, cumbersome, and not very adaptable to patients of different ages and body sizes. We now present an alternative, microbiologically safe transportation system which delivers, high-efficiency particulate air-filtered air over the head and neck through a modified, lightweight, commercially available helmet and power supply and which can be comfortably and reliably used by isolated patients.

Air Microbiology↗

PubMed1980

Methods to quantify silver in autoradiographs.

The developed silver in specially prepared photographic films (PF) and autoradiographs (AR) of radiolabeled arterial tissue was quantified by direct grain counting (GC), microdensitometry (OD), and by electron probe X-ray microanalysis (EPA). The EPA data was proportional to the OD data with a very small variance. The GC data increased with the EPA data, but showed a large variance. The EPA signal was shown 1) to be reproducible even after multiple traverses across the specimen, 2) to be directly proportional to the electron beam current and emulsion silver concentration, and 3) to be insensitive to a) beam size, b) current density, c) energy above 17 keV, or d) nonuniformities in the thickness of the conductive coating on the specimen.

Autoradiography↗

PubMedDate not supplied

Application of piezo film technology for the quantitative assessment of pruritus.

A method to quantitate scratching has been developed for assessing the efficacies of interventions purported to ameliorate pruritus. The technique employs a piezo film sensor attached to the finger and the supporting electronics to amplify, transmit, and process the signals generated by the piezo film. The piezo film is essentially a contact microphone on the fingernail of the scratching subject. The method is currently incorporated into clinical trials, and preliminary results are promising.

Analog-Digital Conversion↗

PubMedDate not supplied

A computerized physiologic pulse duplicator for in-vitro hydrodynamic and ultrasonic studies of prosthetic heart valves.

A physiologic pulse duplicator for the simultaneous in-vitro hydrodynamic and ultrasonic evaluation of aortic prosthetic heart valves is described. The system is interfaced to a personal computer, which provides greater efficiency over manual techniques in system calibration, data acquisition, and analysis. The data analysis program aids selection of start and end systole and calculates pressure difference across the valve, the closing and regurgitant volumes, flow rates, and the Gabbay and Swanson performance indices. The pulse duplicator is designed to accommodate the ultrasonic measurement of fluid velocities, including pressure difference via the Bernoulli equation, and color-flow imaging. In tests of 19-mm, 23-mm, and 27-mm Bjork-Shiley spherical occluder valves, continuous-wave Doppler ultrasound was found to overestimate by about 50% the pressure difference measured directly by pressure transducers, a finding that is clinically important.

Aortic Valve↗

PubMedDate not supplied

Collaborative development of a patient simulator for educating nurses in hemofiltration therapies.

As the complexity and variety of the treatment modalities in critical care continue to expand, the clinician is faced with the task of providing a safe environment for the education of staff and the evaluation of these new modalities. The use of simulators, similar to the one described in this article, is one economical solution that can provide this education and evaluation. For instance, the major components of the hemofiltration simulator can be fabricated and purchased for under $1,000. This estimate excludes the medical cart, which retails for $437. The success of such a solution, however, necessitates that the simulator meet the defined clinical needs while meeting or exceeding the biomedical equipment standards set by AAMI or other regulatory agencies that might govern the use of such devices.

Biomedical Engineering↗