Catheter for measuring intrauterine pressure

Details Catheter for measuring intrauterine pressure Catheter for measuring intrauterine pressure

1976-02-17

1979-01-30

Howell, Kyle L.

Surgery

Truss

Perineal

128 205D, 128349R, A61B 500

Patent

active

041366816

ABSTRACT:
A catheter is disclosed for measuring the intrauterine pressure of a woman in labor. It comprises an elongated flexible tube which is inserted into the uterus through a curved guide tube adapted to be inserted through the vagina and cervix of a woman in labor. The catheter tube contains a sterile liquid and is closed at both ends by a seal which is capable of transmitting pressure from the liquid within the catheter to an external liquid. In a preferred embodiment, a limp membrane is used to couple the catheter tube to a strain gauge or the like for measuring pressure. The catheter end within the uterus includes a number of pinholes and a capillary material within the tube to prevent loss of the catheter liquid. Alternatively, and particularly where it is desired not to rupture the amniotic membrane, a second limp membrane may be used as the means for coupling between the catheter liquid and the uterus.
Where the uterine end of the catheter includes a series of pinholes, the guide tube is sealed and the catheter tube is packaged with its uterine end in a sterile liquid inside the guide tube.

REFERENCES:
patent: 3095871 (1963-07-01), Mann et al.
patent: 3559643 (1971-02-01), Pannier et al.
patent: 3570485 (1971-03-01), Reilly
patent: 3720201 (1973-03-01), Ramsey
patent: 3752150 (1973-08-01), Harris
patent: 3835854 (1974-09-01), Jewett
patent: 3958562 (1976-05-01), Hakim et al.
Junge, H. D., German Med. Journ.:, "Obstetrics and Gynecology," 29, 2, (Feb. 1969), pp. 129-133.

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