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US006427687B1
(12) United States Patent ao) Patent No.: us 6,427,687 Bi
Kirk (45) Date of Patent: *Aug. 6,2002
(54) RESUSCITATOR REGULATOR WITH CARBON DIOXIDE DETECTOR
(75) Inventor: Gilbert M. Kirk, Carrollton, TX (US)
(73) Assignee: Mallinckrodt, Inc., Hazelwood, DE (US)
( * ) Notice: Subject to any disclaimer, the term ol this
patent is extended or adjusted under 35
U.S.C. 154(b) by 0 days.
This patent is subject to a terminal dis-
claimer.
(21) Appl. No.: 09/542,686
(22) Filed: Apr. 4, 2000
Related U.S. Application Data
(62) Division of application No. 08/725,153, filed on Oct. 3, 1996, now Pat. No. 6,123,075, which is a continuation-inpart of application No. 08/514,112, filed on Aug. 11, 1995, now Pat. No. 5,679,884, which is a division of application No. 08/177,438, filed on Jan. 5, 1994, now Pat. No. 5,456, 249, which is a division of application No. 07/776,615, filed on Oct. 15, 1991, now Pat. No. 5,279,289.
(51) Int. CI.7 A61M 16/00
(52) U.S. CI 128/203.11; 128/205.13;
128/205.23
(58) Field of Search 128/202.28, 203.11,
128/205.13, 205.17, 205.23
(56) References Cited
U.S. PATENT DOCUMENTS
3.363,833 A * 1/1968 Laerdal 128/205.13
3,556,122 A 1/1971 Laerdal 137/102
3,612,048 A 10/1971 Takaoka et al 128/188
3,615,233 A 10/1971 Doering et al 23/252
3,659,586 A * 5/1972 Johns et al 128/2 E
4.077,404 A 3/1978 Elam 128/205.13
4.106,502 A * 8/1978 Wilson 128/145.8
4,346,584 A * 8/1982 Boehringer 73/23
4,366,821 A * 1/1983 Wittmaier et al 128/719
Primary Examiner—Aaron J. Lewis
(74) Attorney, Agent, or Firm—Baker Botts L.L.P.
A resuscitator is provided with an integral carbon dioxide detector for indicating the presence ol carbon dioxide in a patient. The carbon dioxide detector is a conventional pH sensitive chromogenic compound that is positioned in the breathing circuit to permit a rapid indication.
13 Claims, 6 Drawing Sheets
