Device and method for the administration of oxygen
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61M-015/08
A62B-007/00
출원번호
US-0561380
(2000-04-27)
발명자
/ 주소
Kirsch, Wolff M.
Farnsworth, Albert W.
Zhu, Yong Hua
출원인 / 주소
Loma Linda University Medical Center
대리인 / 주소
Knobbe, Martens, Olson & Bear, LLP.
인용정보
피인용 횟수 :
41인용 특허 :
26
초록▼
A nasal cannula is provided having a first and second nasal plug connected to a gas supply such as oxygen. A holder frictionally engages each nasal plug and a connector connects the two holders. The plugs are movable along the length of the connector to allow adjustment of the spacing between nasal
A nasal cannula is provided having a first and second nasal plug connected to a gas supply such as oxygen. A holder frictionally engages each nasal plug and a connector connects the two holders. The plugs are movable along the length of the connector to allow adjustment of the spacing between nasal plugs to accommodate a person's nostrils but with sufficient friction to retain the selected position. The plugs are rotatable around the longitudinal axis of the connector to adjust the orientation of the plug within a nostril relative to a patient's face, but with sufficient friction to retain the selected position. One of the connector or holder is removably fastened to the patient's face. A regulator is interposed in the gas supply to vary the flow rate and pressure to meet predetermined patterns.
대표청구항▼
1. An assembly for use with a nasal cannula, comprising:a first and second nasal plug each having a gas inlet and a nostril outlet prong configured for insertion into a patient's nostril and through which gas can pass, the inlets of the two nasal plugs being adapted to be placed in fluid communicati
1. An assembly for use with a nasal cannula, comprising:a first and second nasal plug each having a gas inlet and a nostril outlet prong configured for insertion into a patient's nostril and through which gas can pass, the inlets of the two nasal plugs being adapted to be placed in fluid communication with a gas supply;a first holder connected to the first nasal plug and a second holder connected to the second nasal plug; anda connector connected to each of the holders, the first and second plugs being independently and movably mounted to the first and second holders, respectively, the plugs being selectively movable relative to each other and the connector along and about an axis generally transverse to an axis of the patient's nostril;wherein at least one of the first and second holders comprises a holding portion frictionally engaging at least one of the nasal plugs sufficiently to maintain a selected linear position and angular orientation of the plug along and about the transverse axis under normal use of the nasal cannula yet allow linear and rotational movement of the plug along and about the transverse axis upon application of a friction-overcoming force to adjust a relative spacing between the plugs and the angular orientation of the plugs while the plus,s remain in contact with the respective holders. 2. An assembly as defined in claim 1, wherein the first and second holders further comprise an attaching portion connected to the holding portion, and the attaching portion is adapted to be removably fastened to a patient's face. 3. An assembly as defined in claim 2, wherein the connector is adapted to be removably fastened to a patient's face with adhesive. 4. An assembly as defined in claim 3, wherein a gas supply is placed in fluid communication with the inlet of at least one of the nasal plugs. 5. A nasal cannula as defined in claim 3, wherein a shape of each plug consists of a straight tube with a changing curvature connecting to the end opening that resembles a nipple portion of a baby bottle. 6. An assembly as defined in claim 1, wherein the connector further comprises a bar and the holders are movably fastened to either a gas supply connected to the inlet of a nasal plug, or are movably fastened to the nasal plug. 7. An assembly as defined in claim 1, wherein edges of the nostril outlet pronges each have inwardly curved surfaces leading to edges forming openings through which gas passes in exciting the outlet prongs. 8. A nasal cannula as defined in claim 1, further comprising a gas source in fluid communication with the nasal plugs, and a device for varying at least one of a pressure or a flow rate of the gas to the nasal plug according to a predetermined pattern. 9. A nasal cannula as defined in claim 8, wherein the device for varying the flow rate of the gas further comprising a two-port directional control valve with a first and a second inlet, a first and a second outlet where the first inlet and the first outlet are aligned in a first line and the second inlet and the second outlet are aligned in second line in parallel with the first line with a spacing between the first line and the second line, and two Y-shaped connectors, one of the Y-shaped connectors adapted to connect to the gas source with said first and second inlet of said directional control valve, the other said Y-shaped connector adapted to connect said first and second outlet of said directional control valve to a main oxygen supply line which connects to the nasal cannula. 10. A nasal cannula as defined in claim 9, wherein the directional control valve further comprising a central elongated channel with a sufficient length which is perpendicular to and in communication with said inlets and outlets, a spring with one end attached to one end of said channel on one side, a valve connected to the other end of said spring, and a solenoid to reciprocate the valve in the channel to vary the gas flow, the solenoid being in electrical connection wit h a control circuit, where the control circuit has a timer which provides a signal to turn the power to the solenoid on and off with a preset frequency. 11. A nasal cannula as defined in claim 10, wherein the valve has a three-portion shape with a first portion, a second portion and a third portion connected to each other, and with the first portion connected to the spring, where the first and the third portions have a larger dimension than that of the second portion, the larger dimension being smaller than that of the channel so that the valve can reciprocate inside of and along the channel. 12. A nasal cannula as defined in claim 10, wherein the first portion of the valve is at the first line blocking the flow from first inlet to the first outlet and the second portion of the valve is at the second line position while the spring is at a relaxed position when the solenoid is at an “OFF” status, and wherein the second portion of the valve is at the first line position with the spring being compressed when the solenoid is at an “ON” status which allows the gas flowing from the first inlet through the first outlet. 13. A nasal cannula as defined in claim 9, wherein the directional control valve further comprises a safety control valve located in the second outlet. 14. A nasal cannula as defined in claim 13, wherein the safety control valve is a manual valve. 15. A nasal cannula as defined in claim 13, wherein the safety control valve is an electrically controlled valve connected to the control circuit, and the safety control valve can be opened when a signal is sent by the control circuit. 16. A nasal cannula assembly, comprising:a first and second nasal plug each having an apertured nostril outlet prong each configured to be inserted into a patient's nostril, and a gas inlet extending at an angle to the outlet prong and adapted to be placed in fluid communication with a gas supply; anda connector extending between the plugs a length sufficient to allow the plugs to be placed in a patient's nostrils, the plugs being movably mounted relative to each other and the connector along and about an axis generally transverse to an axis of the patient's nostril so that a spacing between the plugs along the transverse axis is selectively adjustable and the rotational position of each plug about the transverse axis is selectively adjustable, the plugs being held to the connector sufficiently to maintain a selected position and orientation of the plugs during normal use of the cannula. 17. An assembly as defined in claim 16, wherein the nasal plugs are mounted to the connector by a holder connected to the connector and forming a frictional contact with the nasal plugs sufficient to hold a position and orientation of the nasal plugs relative to the connector. 18. An assembly as defined in claim 17, further comprising an elongated and flexible attaching portion connected to the holder and adapted to be removably and adhesively secured to a patient's face during use of the cannula. 19. An assembly as defined in claim 18, wherein the first and second holder each comprise an annular portion having a slot of sufficient size that the slot provides access for inserting and removing the nasal plugs into the annular portion. 20. An assembly as defined in claim 18, wherein the first and second holder each comprise an annular portion having an elastomeric surface around at least a segment of the annular portion and located to frictionally engage one of the nasal plugs passing therethrough. 21. An assembly as defined in claim 17, further comprising a gas source in fluid communication with the nasal plugs, and a device for varying at least one of a pressure or a flow rate of the gas to the nasal plug according to a predetermined pattern. 22. An assembly as defined in claim 16, wherein the plug outlet openings have edges that are rounded sufficiently to reduce irritation of a patient's nostril. 23. A method of providing gas to a patient through a nasal cannula, comprising the steps of:placing at least one of a first and second nasal plug in fluid communication with a gas source, and inserting each nasal plug into a patient's nostril;movably connecting each nasal plug to a respective holder, the holders being connected by a connector that maintains a desired space between the holders, each of the holders being configured to frictionally engage a respective plug sufficiently to maintain a spacing and orientation of each plus relative to the patient's nostrils and the other plug during normal use, the plugs being selectively movable relative to each other and the connector along and about an axis generally transverse to an axis of the patient's nostril;removably fastening one of the holder or connector to a patient's face; andselectively applying force to at least one plug to move the plug relative to the holder while the holder or connector remains fastened to the patient's face and the at least one plug remains inserted in the patient's nostril. 24. A method as defined in claim 23, wherein the holder has an elongated portion and the fastening step comprises adhering the elongated portion to the face of the patient. 25. A method as defined in claim 24, wherein the elongated portion of the holder is adhered to the patient's face with an adhesive. 26. A method as defined in claim 24, wherein each holder comprises a slot configured to accept a portion of the corresponding plug, the slot comprising an elastomeric surface adapted to frictionally engage the portion of the plug. 27. A method as defined in claim 23, comprising the further step of placing a gas in fluid communication with the nasal cannula, and varying at least one of a flow rate or a pressure of the gas provided to the nasal plugs. 28. The method of claim 23 additionally comprising applying force to at least one plug to rotate the plug within the holder so as to change the angular position of the plug relative to the transverse axis. 29. An assembly for use with a nasal cannula, comprising:a first and second nasal plug each having a gas inlet and a nostril outlet configured for insertion into a nostril and through which gas can pass, the inlets of the two nasal plugs being adapted to be placed in fluid communication with a gas supply; anda connector comprising a first holder and a second holder, at least one of the first and second holders comprising a holding portion frictionally engaging at least one of the nasal plugs sufficiently to maintain a selected linear position and angular orientation of the plug along and about an axis generally transverse to an axis of the nostril under normal use of the nasal cannula yet allow linear and rotational movement of the plug along and about the transverse axis upon application of a friction-overcoming force to adjust a relative spacing between the plugs and the angular orientation of the plugs without removing the nostril outlet from the patient's nostril. 30. An assembly as defined in claim 29, wherein the first and second holders are connected to each other by a bridge member, and each of the holders comprises an elongate attachment portion adapted to be releasably secured to a patient's face. 31. An assembly as defined in claim 30, wherein the elongate attachment portion is configured to be secured to a patient's face with an adheive. 32. An assembly as defined in claim 30, wherein the nasal plugs can be removed from the holding portions without the holding portions being removed from the patient's face. 33. An assembly for use with a nasal cannula, comprising:a first and second nasal plug each having a gas inlet and a nostril outlet prong configured for insertion into a nostril and through which gas can pass, the inlets of the two nasal plugs being adapted to be placed in fluid communication with a gas supply;a first holder connected to the first nasal plug and a second holder connected to the second nasal plug;a connector connected to each of the holders, the plugs being movably mounted relative to each other and the connector;a gas source in fluid communication with the nasal plugs; anda device for varying at least one of a pressure or a flow rate of the gas to the nasal plug according to a predetermined pattern;wherein at least one of the first and second holders comprises a holding portion frictionally engaging at least one of the nasal plugs sufficiently to maintain a selected linear position and angular orientation of the plug along and about an axis of the connector under normal use of the nasal cannula yet allow linear and rotational movement of the plug along and about the axis of the connector to adjust a relative spacing between the plugs and the angular orientation of the plugs; andwherein the device comprises a two-port directional control valve with a first and a second inlet, a first and a second outlet where the first inlet and the first outlet are aligned in a first line and the second inlet and the second outlet are aligned in second line in parallel with the first line with a spacing between the first line and the second line, and two Y-shaped connectors, one of the Y-shaped connectors adapted to connect to the gas source with said first and second inlet of said directional control valve, the other said Y-shaped connector adapted to connect said first and second outlet of said directional control valve to a main oxygen supply line which connects to the nasal cannula, the directional control valve further comprising a central elongated channel with a sufficient length which is perpendicular to and in communication with said inlets and outlets, a spring with one end attached to one end of said channel on one side, a valve connected to the other end of said spring, and a solenoid to reciprocate the valve in the channel to vary the gas flow, the solenoid being in electrical connection with a control circuit, where the control circuit has a timer which provides a signal to turn the power to the solenoid on and off with a preset frequency. 34. A nasal cannula as defined in claim 33, wherein the valve has a three-portion shape with a first portion, a second portion and a third portion connected to each other, and with the first portion connected to the spring, where the first and the third portions have a larger dimension than that of the second portion, the larger dimension being smaller than that of the channel so that the valve can reciprocate inside of and along the channel. 35. A nasal cannula as defined in claim 33, wherein the first portion of the valve is at the first line blocking the flow from first inlet to the first outlet and the second portion of the valve is at the second line position while the spring is at a relaxed position when the solenoid is at an “OFF” status, and wherein the second portion of the valve is at the first line position with the spring being compressed when the solenoid is at an “ON” status which allows the gas flowing from the first inlet through the first outlet.
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