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
  • A61M16/20—Valves specially adapted to medical respiratory devices
• • 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
  • A61M16/0833—T- or Y-type connectors, e.g. Y-piece
• • 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

Definitions

• valve assembly which can be effectively locked in either configuration. It is a still further preferred object- to provide anaesthetic apparatus incorporating the valve assembly.
• a valve assembly for anaesthetic apparatus including: a first valve body having an inlet, an outlet and a port; a first valve member in the first valve body operable between a first position and a second position to interconnect the inlet and the outlet, or the inlet, the outlet .and the port, respectively; a second valve body having an inlet, a first outlet and a second outlet; a second.valve member in the second valve bod operable between a first position and a second position to interconnect the inlet to the first and second outlets, or the inlet and the second outlet, respectively; means to move one of the valve members betwee its respective first and second positions; and a lost motion connection between the first an second valve members to cause the other of the valve membe to move between its first and second positions after initi movement of the one valve member.
• first and second valve bodies ar provided in'a main valve body, with no communication betwe the valve bodies.
• the second valve member is a plug valve with an elbow-shaped bore i.e. the bore has two radially extending legs at right angles.
• the means to operate the valve assembly includes a handle or lever connected to the first valve member.
• the handle or lever is releasabl locked in its respective position e.g. by a pin or detent, ball and socket or like arrangement.
• the lost motion connection includes a peg on one valve membe ' r engageable in a slot in the other valve member, a peg on one valve member engageable between a pair of pegs or abutments on the other valve member, or a block or abutment on one valve member engag eable with a block or abutment on the other valve member
• one valve member is rotatable through 180°
• a the other valve member is rotatable through 90°
• the los motion being operable for the first 90°of rotation of th one valve member in either direction.
• anaesthetic apparatus including: a valve assembly as hereinbefore described; a fresh gas supply connected to the inlet of the first valve body; an inspiratory tube or hose connected to the outlet of the first valve body; a reservoir bag connected to the port of the first valve body; an expiratory tube or hose connected to the inlet of the second valve body; a mouth piece interconnecting the inspirator and expiratory tubes or hoses; a ventilator connected to the first outlet o the second valve body; and an . expiratory or blow-off valve connected to the second valve body, the first and second valve members being movable from their respective first position for controlled ventilation of a patient and their respective second position for spontaneous ventilation of the patien
• the apparatus With the valves in their first positions, the apparatus operates a a Mapleson D or E (or Bain) type apparatus dependent on the mouthpiece being used. With the valves in their second positions, the apparatus opera
• FIG. 1 is a perspective view of the anaesthetic apparatus arranged for controlled (Mapleson D) ventilatio
• FIG. 2 is a sectional view showing the respecti position of the first and second valve members for controlled ventilation;
• FIG..3 is a perspective view of the apparatus arranged for spontaneous (Mapleson A) ventilation;
• FIG. 4 is a sectional view, corresponding to FIG. 2, for spontaneous ventilation;
• FIG. 5 is a front exploded view of the valve;
• FIG. 6 is an end view of one embodiment of the two valve members taken on line X-X, X-Y respectively;
• FIG. 7 is an end view corresponding to FIG. 6 o a second embodiment
• FIG. 8 is an end view corresponding to FIG. 6 o a third embodiment.
• valve assemb 10 has a first valve body 11 and a second valve body 12 connected by a housing 13, the three components having a common plain bore 14 closed at one end by a wall (not shown) and at the other end by a screw-threaded removable plug 15.
• the first body 11 has an inlet 16 and an outlet 17 which are diametrically opposed, and a port 18 extend ⁇ ing from the underside of the body, the inlet, outlet and port all being in communication with the bore.
• a first valve member 19 is rotatably mounted in the bore 14.
• the member is in the form of a plug valv which is rotated by a handle or lever 20 via an extension shaft 21 which extends through the plug 1 .
• a diamm- etrical bore 22 is provided through the valve member and a radial branch passage 23 is connected thereto. In the first position of the valve member 19, the bore 22 inter connects the inlet 16 and outlet 17, while in the second position, the bore 22 and passage 23 interconnect the inlet 16, outlet 17 and port 18.
• the second valve body 12 has an inlet 24 aligned with the outlet 17 of the first valve body.
• a first outlet 25 extends downwardly from the valve body 1 and a "blow-off" or expiratory ⁇ valve 26 is fitted to the second outlet 27 diametrically opposed to the first outl
• the blow-off pressure of the expiratory valve 26 is con ⁇ trolled by a knurled knob 28, the gas released passing through an exhaust outlet 29.
• the second valve member 30 which is also a pl valve, is rotatably mounted in the bore 14 and has a diametrical bore 31 and a radial branch passage 32.
• a semi-circular block or abutment 34 extends from the inne face of the first valve member 19, while a quarter-.circul block 35 extends from the inner face of the second valve member 30.
• a pair of pins 36, 37 extend from the inner face of the first valve member 19 and are spaced approximately 90 apart to receive and engage a pin 38 on the adjacent inner face of the second valve member.
• the pin 38 abuts pin 37.
• the first valve member 19 is rotated through 90 by the lever 20, the second valve member does not rotate until the pin 38 engages pin 36. Further rotatio of the first valve member through 90° (i.e.
• the pin 37 may be engaged on the second valve member 30 in a 180° slot 40 in the inner end of the first valve member 19.
• the inlet 16 is connected to a fresh gas supply (FGS) (not shown), the outlet 17 to an inspir atory pipe 41-, the port 18 to a reservoir bag 42, the inlet 24 to an expiratory pipe 43, the first outlet 25 to a ventilator (not shown) and the second outlet 27 to the expiratory valve 26 (the exhaust outlet 29 of the latter being connected to the extension of the- operating room by a hose).
• FGS fresh gas supply
• a mouthpiece 44 is provided at the upp ends of the inspiratory and expiratory pipes 41 , 43 to b received by the patient.
• the lever 20 is rotated to move both valve members to their first positions (see FIG. 2) while for spontaneous ventilation the lever is rotated and both valve members are moved to their second positions (see FIG. 4).
• the anaesthetist is always sure that the two valves are in their correct positions.
• the spring loaded lock pin 36 is provided on the lever to lock it in either position to ensure both valve members are full home.
• the gas enters the first valve member and passes through the inspiratory pipe 41 and the expiratory pipe 43 and is directed to the ventilator connected to the first outlet 25 by the second valve member 30, the expiratory valve 26 being closed.
• the ventilator has drawn the required volume of gas e.g. 1 litre, it pumps the gas back along the expiratory pipe 43 to the mouthpiece 44 and thereby to the patent , the gas pressure in the inspiratory pipe 42 limiting its flow along the latter.
• the ventilator draws the stale gas from the patient, fresh gas enters via the inspiratory pipe and the CO- laden gas is expelled via the ventilator
• the expiratory valve 26 is partially opened to limit the gas pressure pumped to the patient's lungs via the expiratory pipe 43.
• valve members 19, 30 are rotated to their second positions.
• the reservoir bag 42 is connected to the fresh gas supply (FGS) by the branch passage 23 in the first valve member 19 while only the second outlet 27 (and the expiratory valve 26) are connected to the fresh gas supply (FGS) by the branch passage 23 in the first valve member 19 while only the second outlet 27 (and the expiratory valve 26) are connected to the fresh gas supply (FGS) by the branch passage 23 in the first valve member 19 while only the second outlet 27 (and the expiratory valve 26) are
• the second valve member 30 may have an elbow shaped bore, with perpendicular legs, replacing the diametrical bore 31 and branch passage 32, the wall of the elbow shaped bore being indicated by the dashed lines 45 on FIG. 4.
• the inlet 24 is only connected to the first outlet 25 and the expiratoryvalve 26 is isolated, while for spontaneous ventilation, the inlet 24 is only connected to the expiratory valve 26.
• pegs 46 and sockets 47 may be provid on the respective components in preset rating patterns and the locking pin 36 can only engage suitable detents 48 in the plug 15 when the lever 20 is fully raised
• the invention provides a simple, yet efficient and foolproof means for controlling ⁇ the ventilation of patients and ensures that the patient is properly venti ated at all times.

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)
• Mechanically-Actuated Valves (AREA)
• Multiple-Way Valves (AREA)
• Earth Drilling (AREA)
• Fluid-Driven Valves (AREA)
• Preventing Unauthorised Actuation Of Valves (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=3770333

Family Applications (1)

Country Status (4)

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Family Cites Families (5)

• 1984
  • 1984-10-01 GB GB08602572A patent/GB2172206B/en not_active Expired
  • 1984-10-01 WO PCT/AU1984/000189 patent/WO1985001559A1/en unknown
  • 1984-10-01 AU AU34396/84A patent/AU560885B2/en not_active Expired
  • 1984-10-01 EP EP84903615A patent/EP0188423A1/de not_active Withdrawn

Non-Patent Citations (1)

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