US Patent No: 4,455,141

Number of patents in Portfolio can not be more than 2000

Drainage apparatus with vacuum control

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Importance

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Abstract

A drainage apparatus has a collection chamber connected to the pleural cavity of a patient with a vacuum pump connected through a water seal chamber to the collection chamber. A pressure regulating chamber maintains the negative pressure created by the vacuum pump in the water seal chamber at a desired negative pressure. When there is an increase in negative pressure within the pleural cavity of the patient, atmospheric pressure is transmitted through a liquid at a selected level in an excess negativity chamber to the collection chamber to reduce the negative pressure in the collection chamber and the pleural cavity of the patient connected thereto to a selected maximum above the negative pressure maintained in the collection chamber by the vacuum pump and regulated by the pressure regulating chamber.

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First Claim

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Patent Owner(s)

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International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Todd, Edward P Lexington, KY 2 27

Cited Art

Patent Info (Count) # Cites Year
 
KURTZ, ROBERT J. (2)
4,261,362 Underwater drainage apparatus with reduced dead air space 15 1979
4,324,244 Two-chamber underwater drainage apparatus with oneway outflow valve and dual hangar retainers 8 1980
 
C.R. BARD, INC. (1)
4,289,158 Suction control apparatus 29 1979

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
C.R. BARD, INC. (3)
8,337,475 Corporeal drainage system 0 2005
8,177,772 Catheter connection systems 1 2006
8,235,971 Catheter connection systems 0 2010
 
SHERWOOD SERVICES AG (3)
4,963,135 Floatation chamber for use in a chest drainage device 2 1989
4,994,050 Float chamber and sleeve for use in a chest drainage device 3 1989
5,931,821 Chest drainage unit with controlled automatic excess negativity relief feature 40 1997
 
TECHNOLOGY HOLDING COMPANY II (3)
4,715,856 Air leak detection system for chest fluid collection bottles and blow-out prevention baffle therefor 9 1985
5,026,358 Drainage device 23 1990
5,300,050 Drainage device 38 1993
 
BOEHRINGER LABORATORIES, INC. (2)
4,767,417 Drainage device for collecting liquids from a body cavity 25 1986
5,372,593 Process and apparatus for collecting blood of a patient for autotransfusion 25 1993
 
DEKNATEL TECHNOLOGY CORPORATION (2)
4,519,796 Thoracic drainage device 24 1983
5,507,734 Drainage device 39 1994
 
BIORESEARCH, INC. (1)
4,648,874 Air leak detection chamber for drainage device 4 1985
 
BOEHRINGER LABORATORIES, A CORP. OF PA (1)
4,781,707 Process and apparatus for collecting blood from a body cavity for autotransfusion 53 1986
 
SNYDER LABORATORIES, INC. (1)
4,534,765 Modular drainage apparatus having excess negativity control 9 1982
 
VANDERBILT UNIVERSITY (1)
4,772,277 Chest cavity evacuation apparatus with resettable air volume meter 2 1987
 
ZIMMER ORTHOPAEDIC SURGICAL PRODUCTS, INC. (1)
4,601,715 Chest drainage device with sound muffling tube 7 1984