Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1981-11-23
1984-01-03
Truluck, Dalton L.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604129, 604247, 137217, A61M 2700
Patent
active
044240589
ABSTRACT:
A drainage control valve apparatus utilizes a pressure relief valve for opening upon a predetermined fluid pressure being applied thereto and a liquid column is used for holding the pressure relief valve open by the weight of the liquid column escaping past the pressure relief valve to apply a negative pressure to the back of a pressure relief valve element. A small opening or a check valve releases the suction column when drainage is complete to allow the pressure relief valve to close. The pressure relief valve may be a spring biased valve and may be adjusted by varying the compression on the spring. The unit may be attached to a patient's leg with a strap. A method of draining a bladder is provided having the steps of opening a pressure relief valve under bladder pressure in a catheter, holding the pressure relief valve open with the suction of a column of liquid formed by the liquid passing the opened pressure relief valve and releasing the pressure relief valve when drainage is substantially complete.
REFERENCES:
patent: 1782367 (1930-11-01), Ridgway
patent: 2242401 (1941-05-01), Loughridge
patent: 3171423 (1965-03-01), Dillon
patent: 3730209 (1973-05-01), Binard et al.
patent: 3954223 (1976-05-01), Wichman et al.
patent: 4084593 (1978-04-01), Jarund
Hobby, III William M.
Holcomb Allen K.
Parsons Robert L.
Valdespino Joseph M.
Varraux Alan R.
Hobby Willaim M.
Truluck Dalton L.
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