Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
  • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
  • A61M16/0816—Joints or connectors
  • A61M16/0841—Joints or connectors for sampling
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
  • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
  • A61M16/0816—Joints or connectors
  • A61M16/0841—Joints or connectors for sampling
  • A61M16/0858—Pressure sampling ports
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
  • A61M16/20—Valves specially adapted to medical respiratory devices
  • A61M16/201—Controlled valves
  • A61M16/207—Membrane valves with pneumatic amplification stage, i.e. having master and slave membranes

Definitions

• the present invention generally relates to a respiratory regulator for administering gaseous fluid(s) to patients and, more particularly, is concerned with
• T_ Q positive-flow, demand responsive, respiratory regulator.
• Positive pressure respiration systems are used in inhalation therapy for individuals requiring administration ⁇ _5 of oxygen and/or adjuvant gaseous fluids for breathing, or administration of such gaseous fluid(s) for assistance in breathing.
• Typical conventional respirators cycle from inspiration to expiration phases by operation of fluid amplifiers pneumatically controlled valves, snap valves,
• Positive pressure respiration systems are categorized according to the fluid administration requirements of the patients as denoted above.
• One such category includes positive pressure volume limited respiration systems which operate by administering a
• a second category includes positive pressure flow limited respiration systems which function in response to a patient's respiratory cycle, allowing the patent to inspire a volume of gaseous fluid(s)
• a third category consists of positive flow respiration devices which continuously deliver a regulated, but constant, volume of gaseous fluid(s) the patient during inspiration as well as during expiration.
• Another object of the invention is to provide a positive-flow, demand responsive, respiratory regulator ⁇ j c wherein an intermittent volume of gaseous fluids is actuated by pressure variations of the patient's respiratory cycle.
• Still another object of the invention is to provide a positive-flow, demand responsive, respiratory regulator where the absence of sufficient positive pressure 2 Q by the patient would cause a flush flow condition, thereby providing flow of gaseous fluid(s) to the patient, and rendering the system fail safe.
• Still another object of the invention is to provide a positive-flow, demand responsive, respiration 25 regulator in which the wasteful "venting" of the fluid is minimized.
• the present invention is a positive-flow, demand responsive, respiratory regulator which controls the administration of gaseous fluid(s) from a pressurized and regulated supply conduit through a delivery conduit and cannula to a patient.
• pressure in a static sensor port line decreases, causing a breathing pressure augmentation diaphragm to move toward a
• FIG. 1 is a schematic view of a respiratory system embodying the principles of the present invention
• FIG. 2 is an enlarged cross-sectional view of a positive-flow, demand responsive, respiratory regulator
• FIG. 3 is an enlarged cross-sectional view of a positive-flow, demand responsive, respiratory regulator depicting the arrangement of its component ports in response to negative pressure at the static sensor port during the inspiration phase of the respiration cycle, and
• FIG. 4 is an enlarged cross-sectional view of a positive-flow, demand responsive, respiratory regulator depicting the arrangement of its component parts in response to positive pressure at the static sensor port during the expiration phase of the respiration cycle.
• Repiratory fluid is supplied from a pressurized source 8, through supply conduit 9 , and flow meter 10, to a supply inlet port 6 in the housing 7 of the positive-flow, demand-responsive, respiratory regulator 5.
• the flow then passes to a fluid supply outlet port 14, through a delivery conduit 15, to a nasal cannula 13, and to the patient.
• a static sensor port line 12 is connected from a static sensor port 11 of the regulator 5, to the cannula 13.
• Figure 2 is an enlarged cross-sectional view of a positive-flow, demand responsive, respiratory regulator 5 which includes a fluid supply inlet port 6 embodied in the respirator regulator housing 7, said port being in fluid communication with a pressurized source.
• a static sensor port 11 is embodied in the respirator regulator housing 7 and is in fluid communication with the patient by means of a static sensor port line.
• a fluid supply outlet port 14 is embodied in the respiratory regulator housing 7 and is in fluid communication with the patient by use of a delivery conduit.
• a bleed port 17 is embodied in the respiratory regulator housing 7 and is in fluid communication with surrounding ambient atmospheric pressure.
• the bleed port 17 serves to maintain an internal pressure equilibrium within the respiratory regulator housing 7 by allowing the escape of gaseous fluid(s) passing through a positive pressure flow shut-off port 18 from a diaphragm port 31 in a dragon-fly diaphragm 36.
• a breathing pressure augmentation diaphragm 21 is housed within the housing, and divides sense-side compartment 34 into a first component pressure chamber 22 and a sensor chamber 24 of the respirator regulator housing 7.
• the first component pressure chamber 22, in addition, has interface with the bleed port 17, and a second component pressure chamber 23 via a positive pressure flow shut-off port 18.
• the rest position of the diaphragm 21 is at plane 28.
• the sensor chamber 24 communicates with the static sensor port 11.
• a flow-side compartment 35 in the housing 7, is divided into three chambers.
• a second ⁇ omponent pressure chamber 23 and an intermediate chamber 26 are separated by a dragon-fly diaphragm upper leaf 20, which has a rest position at plane 29.
• the intermediate chamber 26 and a flow chamber 25 are separated by a dragon-fly diaphragm lower leaf 27, which has a rest position at plane 30.
• a control stop 32 is mounted on the breathing pressure augmentation diaphragm 21 so that, when the diaphragm 21 is displaced toward the shut-off port 18, the shut-off port 18 is closed by the control stop 32.
• the second component pressure chamber 23 has interface with the flow chamber through diaphragm port 31 and with the first component pressure chamber 22 via the positive pressure flow shut-off part 18.
• the flow chamber 25 communicates with the inlet port 6 and the outlet port 14.
• a flow stop 33 with diaphragm port 31 through it, is sealed to the dragon-fly diaphragm upper leaf 20 and the dragon-fly diaphragm lower leaf 27 and extends into flow chamber 25.
• the flow stop 33 is positioned so that, when the diaphragms that carry it are displaced toward the inlet port 6, the flow stop closes the inlet port 6 off from the flow chamber, but continues communication between the inlet port 6 and the second component pressure chamber 23.
• Figure 3 is an enlarged cross-sectional view of a positive-flow, demand responsive, respiratory regulator when, during the inspiration phase of the respiration cycle, tne pressure in the static sensor line 12 and sensor chamber 24 decreases, causing the breathing pressure augmentation diaphragm 21 and control stop 32 upward to move toward the static sensor port 11.
• This causes opening of the positive pressure flow shut-off port 18, which in turn causes pressure above the dragon-fly diaphragm upper leaf 20 to decrease from supply pressure to atmospheric and the dragon-fly diaphragms 20 and 27 to move upward, thereby opening the fluid supply inlet port 6.
• the open fluid supply inlet port 6 opens fluid communication of gaseous fluid to the patient.
• FIG. 4 is an enlarged cross-sectional view of a positive-flow, demand responsive, respiratory regulator when during the expiration phase of the respiration cycle, the pressure in the static sensor line 12, port 11, and sensor chamber 24 increases, causing the breathing pressure augmentation diaphragm 21 and control stop 32 to move away from the static sensor port 11.
• This causes closing of the positive pressure flow shut-off port 18 by control stop 32, which in turn causes pressure above the dragon-fly diaphragm upper leaf 20 to increase and the dragon-fly diaphragm upper leaf 20 to move downward, thereby closing the fluid supply inlet port 6 to the flow chamber 25, but not to chamber 23.
• Tne pressure in the chamber 23 overcomes the pressure in the flow chamber 25 (initially at supply pressure), because the exposed area of the diaphragm upper leaf 20 to chamber 23 is far greater than the exposed area of diaphragm 27 to the flow chamber 25.
• the closed fluid supply inlet-port 6 prevents fluid communication of gaseous fluid to the patient, but allows fluid supply to chamber 23.
• the safety margin is essentially the pressure above atmospheric which the patient must cause in chamber 24 in order to allow the non-flow condition. It is the pressure-equivalent which is approximately equal to the force on diaphragm 21 caused by the pressure in chamber 23 on the control stop 32.
• the safety margin can be set by setting the effective area of the diaphragm 21 and port 18 on which the pressure in chamber 23 acts. Because the diaphragm port 31 is very fine (much finer than ports 18 or 17), very little of the medicinal fluid is actually vented. Thus, waste is minimized and safety is maximized. This relationship of ports also causes effective relational timing of the diaphragm movements. It is obvious that minor changes may be made in the form and construction of the invention without departing from the material spirit thereof. It is not, however, desired to confine the invention to the exact form herein shown and described, but it is desired to include all such as properly come within the scope claimed.

Landscapes

• Health & Medical Sciences (AREA)
• Emergency Medicine (AREA)
• Pulmonology (AREA)
• Engineering & Computer Science (AREA)
• Anesthesiology (AREA)
• Biomedical Technology (AREA)
• Heart & Thoracic Surgery (AREA)
• Hematology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• External Artificial Organs (AREA)
• Control Of Eletrric Generators (AREA)
• Respiratory Apparatuses And Protective Means (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=25165033

Family Applications (1)

Country Status (9)

Families Citing this family (7)

Family Cites Families (15)

• 1986
  • 1986-11-04 BR BR8606954A patent/BR8606954A/pt unknown
  • 1986-11-04 WO PCT/US1986/002412 patent/WO1987002590A1/fr not_active Application Discontinuation
  • 1986-11-04 HU HU865557A patent/HUT44183A/hu unknown
  • 1986-11-04 AU AU66226/86A patent/AU6622686A/en not_active Abandoned
  • 1986-11-04 JP JP61506086A patent/JPS63501547A/ja active Pending
  • 1986-11-04 EP EP19860907145 patent/EP0245468A4/fr not_active Withdrawn
• 1987
  • 1987-07-01 FI FI872902A patent/FI872902A0/fi not_active IP Right Cessation
  • 1987-07-03 OA OA59153A patent/OA08625A/xx unknown
  • 1987-07-04 KR KR870700585A patent/KR880700676A/ko not_active IP Right Cessation

Non-Patent Citations (2)

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