Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1991-10-17
1994-06-07
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604121, 604151, 604248, 604135, A61M 100, A61M 520
Patent
active
053185390
ABSTRACT:
A method of manufacturing flexible thick-wall capillary tubing, comprising the steps of extruding a plastics sheath around a filament of uniform diameter, and withdrawing the filament from the sheath to form a length of tubing having a capillary bore which has been defined by the filament. The method enables the manufacture of fine-bore capillary tubing having a tightly controlled bore diameter.
The invention also provides a method of low flow rate metering of a liquid by utilising a length of such tubing as a flow restriction, and apparatus for carrying out the method. This method and apparatus are particularly suited to controlling very low rates of flow of drugs or other injectable liquids to a patient over a prolonged period, in an arrangement which can readily be carried on the patient's arm to alow the patient mobility while being injected.
The invention further provides a syringe driver for use with the drug-feeding method and apparatus, the syringe driver including a spring selected according to a novel formula to deliver a syringe-driving force that varies by less than a predetermined limit.
REFERENCES:
patent: 1633293 (1927-06-01), Smiley
patent: 3451393 (1969-06-01), Sarnoff
patent: 3877428 (1975-04-01), Seagle et al.
patent: 3888239 (1975-06-01), Rubinstein
patent: 4034754 (1977-07-01), Virag
patent: 4381006 (1983-04-01), Genese
patent: 4597754 (1986-07-01), Thill et al.
patent: 4626243 (1986-12-01), Singh et al.
patent: 4743235 (1988-05-01), Waldbillig et al.
patent: 4909783 (1990-03-01), Morrison
Mahood et al., Use of Capillary Tubing for Flow Measurement, Instruments & Automation, vol. 27, pp. 460-461, Mar. 1954.
Cermak Adam J.
O'Neil Alexander G. B.
O'Neil Christine
Yasko John D.
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