Negative pressure pump
First Claim
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1. A method of inhibiting undesirable leakage from a medication infusion pump comprising employing a non-ozone depleting gas having a vapor pressure less than ambient atmospheric pressure at 37°
- C. within the medication infusion pump, wherein the medication infusion pump comprises;
a) a housing, b) a medication chamber defined within the housing, c) means for supplying the medication from the medication chamber to a patient, d) a reservoir defined within the housing and adapted to apply a predetermined negative pressure to the medication chamber; and
e) the non-ozone depleting gas within the reservoir, wherein the gas has a vapor pressure less than ambient atmospheric pressure at normal human physiological temperature;
wherein the vapor pressure of the gas applies a negative pressure to the medication chamber so that undesirable leakage is inhibited and wherein the method of inhibiting undesirable leakage from a medication infusion pump comprising employing a non-ozone depleting gas in said medication infusion pump further functions to avoid depletion of the ozone layer.
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Abstract
A medication infusion pump includes a housing, a medication chamber defined within the housing, means for supplying the medication from the medication chamber to a patient, a reservoir defined within the housing and adapted to apply a predetermined negative pressure to a medication within the medication chamber, and a gas within the reservoir. The gas has a vapor pressure less than ambient atmospheric pressure at normal human physiological temperature, more specifically less than 14.7 psia at 37° C.
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Citations
18 Claims
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1. A method of inhibiting undesirable leakage from a medication infusion pump comprising employing a non-ozone depleting gas having a vapor pressure less than ambient atmospheric pressure at 37°
- C. within the medication infusion pump, wherein the medication infusion pump comprises;
a) a housing, b) a medication chamber defined within the housing, c) means for supplying the medication from the medication chamber to a patient, d) a reservoir defined within the housing and adapted to apply a predetermined negative pressure to the medication chamber; and
e) the non-ozone depleting gas within the reservoir, wherein the gas has a vapor pressure less than ambient atmospheric pressure at normal human physiological temperature;
wherein the vapor pressure of the gas applies a negative pressure to the medication chamber so that undesirable leakage is inhibited and wherein the method of inhibiting undesirable leakage from a medication infusion pump comprising employing a non-ozone depleting gas in said medication infusion pump further functions to avoid depletion of the ozone layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- C. within the medication infusion pump, wherein the medication infusion pump comprises;
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9. A method of facilitating the introduction of a medication into a medication chamber within a medication infusion pump comprising employing a non-ozone depleting gas having a vapor pressure less than ambient atmospheric pressure at 37°
- C. within the medication infusion pump, wherein the medication infusion pump comprises;
a) a housing, b) a medication chamber defined within the housing, c) means for supplying the medication from the medication chamber to a patient, d) a reservoir defined within the housing and adapted to apply a predetermined negative pressure to the medication chamber; and
e) the non-ozone depleting gas within the reservoir, wherein the gas has a vapor pressure less than ambient atmospheric pressure at normal human physiological temperature;
wherein the vapor pressure of the gas applies a negative pressure to the medication chamber that facilitates the flow of the medication from a supply source into the medication chamber and wherein the method of facilitating the introduction of a medication into a medication chamber within a medication infusion pump comprising employing a non-ozone depleting gas in said medication infusion pump further functions to avoid depletion of the ozone layer. - View Dependent Claims (11, 12, 13, 14, 15, 16)
- C. within the medication infusion pump, wherein the medication infusion pump comprises;
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10. The method of 9 wherein the gas is non toxic.
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17. A method of avoiding depletion of the ozone layer comprising using a non-ozone depleting gas having a vapor pressure less than ambient atmospheric pressure at 37°
- C. to inhibit a substance from escaping from the interior of a medication infusion pump to the exterior environment, wherein the medication infusion pump comprises;
a) a housing, b) a medication chamber defined within the housing, c) means for supplying the medication from the medication chamber to a patient, d) a reservoir defined within the housing and adapted to apply a predetermined negative pressure to the medication chamber; and
e) the non-ozone depleting gas within the reservoir, wherein the gas has a vapor pressure less than ambient atmospheric pressure at normal human physiological temperature; and
wherein the vapor pressure of the gas applies a negative pressure to the medication chamber that inhibits a substance from escaping from the interior of a medication infusion pump to the exterior environment.
- C. to inhibit a substance from escaping from the interior of a medication infusion pump to the exterior environment, wherein the medication infusion pump comprises;
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18. A method of avoiding depletion of the ozone layer comprising using a non-ozone depleting gas having a vapor pressure less than ambient atmospheric pressure at 37°
- C. to facilitate the introduction of a medication into a medication chamber within a medication infusion pump, wherein the medication infusion pump comprises;
a) a housing, b) the medication chamber defined within the housing, c) means for supplying the medication from the medication chamber to a patient, d) a reservoir defined within the housing and adapted to apply a predetermined negative pressure to the medication chamber, and e) the non-ozone depleting gas within the reservoir, wherein the gas has a vapor pressure less than ambient atmospheric pressure at normal human physiological temperature; and
wherein the vapor pressure of the gas applies a negative pressure to the medication chamber that facilitates the flow of the medication from a supply source into the medication chamber.
- C. to facilitate the introduction of a medication into a medication chamber within a medication infusion pump, wherein the medication infusion pump comprises;
Specification