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 Title: |
US5074297:
Self-sealing mask for delivering intermittent positive pressure ventilation
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Venegas, Jose G.; Nahant, MA
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| Assignee: |
The General Hospital Corporation, Boston, MA
other patents from GENERAL HOSPITAL CORPORATION (218835) (approx. 654)
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| Published / Filed: |
1991-12-24
/ 1989-12-19
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| Application Number: |
US1989000453988
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| IPC Code: |
Advanced:
A61M 16/06;
IPC-7:
A61M 16/00;
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| ECLA Code: |
A61M16/06; K61M16/06A4; K61M16/06S; K61M16/06A2;
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| U.S. Class: |
Current:
128/204.18;
128/205.13;
128/205.25;
D24/110.4;
Original:
128/204.18;
128/205.13;
128/205.25;
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| Field of Search: |
128/204.18,205.13,205.14,202.28,202.29,203.11,205.16,205.17,205.25
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| Priority Number: |
| 1989-12-19 |
US1989000453988 |
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| Abstract: |
A respirator mask assembly for use with intermittent positive pressure breathing treatments facilitates the formation and automatic intermittent adjustment of the seal between a patient's face and a facial unit of the respirator mask. The respirator mask assembly comprises a facial unit, an expandable piston adjacent the facial unit and a rigid support structure attached to one end of the piston, and an attachment mechanism for securing the mask assembly to a patient. During the inspiration portion of the ventilation cycle a positive pressure is developed within the mask assembly, causing the piston to expand. Because, the attachment mechanism and the support cooperate to resist significant expansion of the piston, a force is generated which presses the facial unit against the patient's face and maintains an air tight seal. When pressure within the masks unit decreases, the contact force on the facial unit is likewise decreased and the seal is eliminated.
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| Attorney, Agent or Firm: |
Lahive & Cockfield ;
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| Primary / Asst. Examiners: |
Burr, Edgar S.; Lewis, Aaron J.
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| Maintenance Status: |
E1 Expired Check current status
CC Certificate of Correction issued
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| INPADOC Legal Status: |
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| Family: |
None
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First Claim:
Show all 18 claims |
What is claimed is:
1. A respirator mask assembly for delivery of intermittent positive pressure ventilation, comprising
- A. a selectively sealable facial unit defining an interior region for communicating with the airway of a patient;
- B. a support structure;
- C. sealing means for intermittently sealing said facial unit to a patient's face, said sealing means including a hollow piston having a first end and a second end,
- said first end being secured to said facial unit and
- said second end being secured to said support structure,
wherein the interior region of said piston is in communication with said interior region of said facial unit, and said first end is displaceable with respect to said support structure in response to pressure variation in the interior of said piston;
- D. securing means affixed to said support structure for securing said mask assembly to the head of a patient; and
- E. means for introducing a breathable gas from a source other than said patient to said interior region of said facial unit.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 100 U.S. patent(s) that reference this one
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