发明名称 |
Inhalation-based control of medical gas |
摘要 |
Method and apparatus are described for supplying medical gas such as oxygen to patients through flexible conduiting terminating in a cannula. Pulses of select duration of the oxygen are supplied in response to the negative pressure associated with a detected patient inhalation. Following the supply of a given pulse, the apparatus dwells for a predetermined interval, for example 0.6 seconds, whereupon a next pulse is supplied if inhalation continues. The first pulse supplied in response to any negative inhalation pressure has a quantity corresponding with a prescribed oxygen flow. Thus, subsequent pulses may supply oxygen ambulatory activities of the patient. The apparatus includes a triggering suppression feature avoiding the false pulsing effects otherwise occasioned by pneumatic transients generated by the pulsing technique. Additionally, a pulse triggering sensitivity which is manually adjustable is incorporated with the control circuit of the apparatus. Improved battery charging and stand-by continuous flow circuit metering is incorporated with the apparatus.
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申请公布号 |
US5099837(A) |
申请公布日期 |
1992.03.31 |
申请号 |
US19900590469 |
申请日期 |
1990.09.28 |
申请人 |
RUSSEL, SR., LARRY L.;ANDERSON, GEORGE A. |
发明人 |
RUSSEL, SR., LARRY L.;ANDERSON, GEORGE A. |
分类号 |
A61M16/00;A61M16/06 |
主分类号 |
A61M16/00 |
代理机构 |
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