Meditsinskaia tekhnika
-
The infusion-transfusion calculator is currently used in intensive care units to compute hemodynamic parameters and volumes of infusion-transfusion media. The system is based on the microcalculator (Formula: see text) and the programmed read-only memory incorporating the programs to compute parameters of interest.
-
Meditsinskaia tekhnika · Nov 1983
[Intermittent positive pressure ventilation of the lungs with the PO-6 respirator].
A modified Soviet ventilator PO-6 is presented suitable for performing intermittent mandatory ventilation (IMV) in combination with continuous positive airway pressure ventilation (CPAP). Some requirements for hardware necessary to realize IMV and CPAP modes are specified, and a critical evaluation of capabilities and disadvantages of the modified design is given in a view of these requirements.
-
Meditsinskaia tekhnika · Sep 1983
[Upgrading the corrosion resistance of medical instruments made of chromium steel of the martensite class with electrochemical polishing].
An electrolyte with surfactant admixtures has been specially designed for finish electrochemical polishing of medical instruments. It enables reducing in requirements for surface roughness and the size of labor-consuming operations when grinding and polishing.
-
Both in the USSR and abroad similar types of martensitic and austenitic stainless steel are used for the manufacture of medical instruments. Martensitic steel, the cheapest and most economically alloyed, has the best combination of properties necessary for medical instruments. The analysis of the Soviet and foreign experience in using different grades of steel for the production of medical instruments demonstrates the expediency and possibility of improving the quality of martensitic steel and rolled stock, as well as that of medical instruments manufactured from these materials, by improving, the operations of the metallurgical and technological processes and by specifying more precisely the requirements for medical instruments. The possibility and expediency of using, in some technically justified cases, lower grades of alloyed steel instead of grade 12X18H9T for clamps and other instruments made of stainless steel, as well as highly corrosive grades of steel for microinstruments, have been established.