WO2015017961A1 - 具有截止阀的医用输液接头 - Google Patents

具有截止阀的医用输液接头 Download PDF

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Publication number
WO2015017961A1
WO2015017961A1 PCT/CN2013/080777 CN2013080777W WO2015017961A1 WO 2015017961 A1 WO2015017961 A1 WO 2015017961A1 CN 2013080777 W CN2013080777 W CN 2013080777W WO 2015017961 A1 WO2015017961 A1 WO 2015017961A1
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WO
WIPO (PCT)
Prior art keywords
joint
valve
shut
joint body
valve stem
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Application number
PCT/CN2013/080777
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English (en)
French (fr)
Inventor
张建铭
Original Assignee
Zhang Jianming
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Filing date
Publication date
Application filed by Zhang Jianming filed Critical Zhang Jianming
Priority to PCT/CN2013/080777 priority Critical patent/WO2015017961A1/zh
Publication of WO2015017961A1 publication Critical patent/WO2015017961A1/zh

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    • 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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/24—Check- or non-return valves

Definitions

  • the present invention relates to a device for introducing a medium into a body, and more particularly to a medical infusion connector having a shut-off valve that is connected to an indwelling catheter.
  • the medical infusion connector consists of a connector 1 and a connector body 2 that is attached thereto.
  • This needle-connected connector body 2 is also commonly referred to as a heparin cap.
  • Infusion set needle from connector body 2 The top sealant plug is inserted.
  • the infusion tube is pulled out of the infusion set, the original space occupied by the needle tube is close to the vacuum, and a recompression occurs in the indwelling catheter.
  • the blood will flow back from the blood vessel into the indwelling catheter, and the blood will be blocked by the blood to block the indwelling catheter, and the infusion can not be re-infused. It may cause a blood clot that can cause harm to the patient. Therefore, the medical staff usually needs to take a sealed syringe with a puncture needle to rinse the indwelling catheter. When the sealing operation is performed, the syringe needle penetrates from the heparin cap rubber plug and enters the heparin cap lumen, which must occupy the heparin cap.
  • the medical staff needs to withdraw the sealing tube liquid while withdrawing the syringe needle, and fill the space occupied by the needle tube to avoid recompression in the indwelling catheter.
  • This kind of operation is cumbersome and still leaves the space that the sealing liquid can not be filled.
  • the negative pressure will still be generated.
  • it is customary to clamp the extension tube to the tube after the flow clamp is clamped.
  • the component slides in the direction, so that the extension tube is gradually squeezed, and the liquid in the extension tube is squeezed into the inner cavity of the indwelling catheter to drive out the backflow blood, but the sliding resistance is large when the stop clamp and the extension tube are clamped, and the extension tube is easily extended.
  • the tube is elongated and thinned.
  • the catheter assembly is pulled repeatedly, and the extension tube is severely broken to cause hemorrhage.
  • the catheter assembly is left and attached to the patient's body, and the length of the extension tube is limited. Be cautious, the catheter assembly will be pulled out of the patient's body. In order to avoid the above accidents, the medical staff should be cautious when operating. Sometimes the length of the stop clip is not enough, or the blood in the catheter can not be completely cleaned, so this operation is invisible. Increased the workload and psychological burden of medical staff.
  • the present invention aims to overcome the deficiencies of the prior art and provide a medical infusion connector with a shut-off valve that can eliminate negative pressure and is convenient to operate. It is a further object of the present invention to provide an infusion operation and a cut-off operation that can be separately operated simultaneously. Medical infusion joints with a shut-off valve that are more convenient to use and which are less prone to work interference with each other.
  • the object of the present invention is achieved by the following route.
  • the medical infusion connector with a shut-off valve includes a connecting seat and a joint body, and the front end of the connecting seat is connected with the extension tube of the indwelling catheter or connected to the infusion tube, and the rear end of the joint body is connected with the infusion set, and the main points of the composition are:
  • the utility model comprises a joint base and a shut-off valve, wherein the joint base is integrally formed with the connecting seat or is separately constructed but fixed to the connecting seat, and the joint body cavity communicates with the inner cavity of the connecting seat through a shut-off valve, the shut-off valve
  • the valve stem is sleeved in the inner cavity of the joint base in a pushable and retractable manner, and the shutoff valve is located in the inner cavity of the joint base or in the inner cavity of the joint or in the inner cavity of the joint, by pushing in and out Close the valve stem to close or open the valve.
  • the inner cavity of the joint base and the connecting seat form a closed cavity, and the volume of the closed cavity is changed by the advancement and retreat of the axial displacement of the valve stem of the shut-off valve.
  • the closed cavity is enlarged; the valve stem of the shut-off valve is advanced, the closed cavity is reduced, the push is advanced, and the infusion channel is cut off.
  • the valve stem of the shut-off valve is retracted first, the shut-off valve is opened, and the closed cavity is enlarged to facilitate the accommodation of more liquid.
  • the needle is withdrawn, the valve stem of the shut-off valve is advanced, and the closed cavity is enlarged from large to small.
  • the space occupied by the original needle tube prevents negative pressure or discharges blood from the catheter into the blood vessel to eliminate negative pressure.
  • This method of preventing negative pressure and eliminating negative pressure is simple, effective, and convenient to operate.
  • the intervention of the stop valve eliminates the negative pressure and cuts off the infusion channel, which is not only more sanitary and safe, but also ensures that the valve stem must be retracted after the infusion is re-injected (otherwise the cut-off valve is closed and cannot be infused). Therefore, the valve stem of the shut-off valve has a space for advancement after the end of the infusion to eliminate the negative pressure. With the process of gradually closing the valve stem of the shut-off valve, the shut-off valve also functions as a flow regulating valve.
  • the object of the present invention can also be achieved by the following means.
  • the medical infusion connector of the present invention can be used in either a needleless connection or a needle connection, that is, the connector body is either a needleless connector or a needle connector.
  • the structural relationship between the joint body and the valve stem of the shut-off valve and the positional relationship between the joint base and the joint can be further optimized as:
  • the joint body is integrally formed with the shut-off valve stem, and the structure connected to the infusion set on the joint body is located at the tail end of the valve stem of the shut-off valve, the valve stem of the shut-off valve has an inner cavity and serves as a joint body cavity through the shut-off valve and the joint seat
  • the chambers are in communication, at which point the joints either extend axially along the joint base and are distributed or distributed in a direction axially intersecting the joint base.
  • the joint body and the shut-off valve stem are separately constructed, and the joint body is fixed to the joint base or fixed to the joint.
  • the structure of the joint body and the valve stem of the shut-off valve can simultaneously operate the infusion operation and the cut-off operation at the same time, and the work interference is less likely to occur, and the use is more convenient.
  • This split configuration can be further optimized to:
  • the positional relationship between the joint body, the joint base and the connecting seat is a three-way structure.
  • either the joint body and the joint base are on the same axis and the joint is intersected with the joint, or the joint
  • the body and the connector are on the same axis and the connector base intersects the two, or the connector is on the same axis as the connector base and the connector body intersects the connector.
  • shut-off valve stem can be placed in the cavity of the joint base in a variety of ways:
  • valve stem can be pushed into and out of the joint base in a pushable and retractable manner.
  • the device for adjusting the axial displacement of the spiral has a variety of specific configurations to choose from, two of which are disclosed below, one of which is:
  • the shutoff valve stem is inserted into the inner cavity of the joint base and is screwed to the joint base.
  • shut-off valve stem rotating the shut-off valve stem causes the shut-off valve stem to spirally rotate relative to the joint base, thereby allowing the shut-off valve stem to spiral forward and spiral back relative to the joint base.
  • An inner seal is disposed in front of the screw connection section of the shutoff valve stem and the joint base.
  • a further specific configuration of the above-described apparatus for helically adjusting the axial displacement may be:
  • the valve stem of the shut-off valve is composed of a screw rod and a lifting head.
  • the front part of the screw rod is inserted into the inner cavity of the lifting head and is spirally connected thereto.
  • the screw rod is also axially connected with the joint base, and the lifting head is front and rear with respect to the joint base. The slipping manner is placed in the inner cavity of the joint base.
  • the spiral rotation is decomposed into idling and forward and backward movement, wherein the idling is completed by the auger, and the forward and backward movement is performed by the lifting head.
  • This configuration is particularly suitable for use in a configuration in which the joint body and the shut-off valve stem are integrally constructed, in which case the sealant that is connected to the needle tube is either located at the end of the screw or at the end of the lift head.
  • shut-off valve stem can also be placed in the interior of the joint base in this manner:
  • the shut-off valve stem is inserted into the inner cavity of the joint base in a retractable sliding manner, and the valve stem of the shut-off valve and the inner cavity of the joint base are coupled with a damping by a seal ring between the two.
  • This damped mating connection provides both a seal and a hand-feel and viscous joint body.
  • a snap device for defining a shut-off valve stem that is slip-in position that is difficult to axially displace, the snap device being mounted between the shut-off valve stem and the joint base lumen.
  • shut-off valve stem Whether it is a retreating or advancing shut-off valve stem, once slipped into position, it is desirable to no longer slide the shut-off valve stem before the next infusion operation, and the snap device can be used to position the shut-off valve stem so that it is not easily axially displaced by itself. .
  • the snap device has a variety of specific configurations to choose from, two of which are disclosed below, one of which is:
  • the buckle device is an elastic buckle composed of a buckle, a spring, and a corresponding slot disposed on the side wall of the valve stem of the shutoff valve, and is buckled by a spring preload It is snapped into the card slot that is slipped in place.
  • the elastic buckle can realize the positioning and can be disengaged under the action of the pushing and pulling force.
  • the other is:
  • the valve stem of the shut-off valve is telescopically slidably inserted into the inner cavity of the joint base, and the buckle device is composed of a bayonet and a sliding slot, and the latch is exposed on the side wall of the joint body, and the sliding slot is correspondingly disposed on the On the side wall of the inner cavity of the joint base, the sliding groove is composed of an axial groove and a transverse groove, and the protruding bayonet head is sleeved in the sliding groove, and the valve stem is displaced along the axial groove by the rotary valve sleeve It enters the transverse groove and is axially engaged with the joint base.
  • the transverse grooves have a slope, but the oblique angle is smaller than the self-locking angle.
  • the inclination facilitates the introduction of the axial groove, and the smaller than the self-locking angle prevents it from sliding by itself under the action of the axial force.
  • shut-off valve Further optimization of the shut-off valve is:
  • the valve flap of the shut-off valve is located at the end of the valve stem of the shut-off valve, and the sealing surface of the shut-off valve is either located on the inner wall of the joint base or on the inner wall of the joint or on the retaining wall of the joint body.
  • the valve is the contact between the disc and the sealing surface.
  • the end of the valve stem of the shut-off valve has a pointed shape, and the corresponding cavity of the inner cavity is a truncated-shaped step corresponding to the pointed cone, and the constricted opening of the truncated-shaped step is an infusion passage port.
  • shutoff valve stem When the tip end of the shutoff valve stem is in contact with the corresponding tapered step, the shutoff valve is closed; and when the shutoff valve stem is retracted, the shutoff valve is opened, and the infusion enters the conical step.
  • the outer peripheral surface of the end of the valve stem of the shut-off valve is covered with a sealing ring, the outer peripheral surface of the sealing ring is used as a valve flap, and the sealing surface of the shut-off valve is located at an infusion passage opening perpendicular to the valve stem.
  • the shut-off valve and the corresponding infusion channel can further optimize the following specific configurations:
  • the joint body is integrally formed with the valve stem of the shut-off valve, the valve stem of the shut-off valve is the joint body, the inner cavity of the joint body includes a vertical passage and a transverse passage, and the transverse passage is located in the inner core of the end of the joint body, and the end of the joint body is smaller than the inner cavity of the joint base
  • the gap between the two serves as an infusion channel communicating with the lateral channel
  • the tip end of the connector body has a pointed cone
  • the inner cavity of the joint base or the inner wall of the connecting seat is a circle corresponding to the pointed cone.
  • a table-shaped step, the inward opening of the truncated step is an infusion port.
  • the shut-off valve When the tapered end of the joint body is in contact with the corresponding tapered step, the shut-off valve is closed; and when the joint body is retracted, the shut-off valve is opened, and the infusion enters the taper through the vertical passage of the joint body, the transverse passage, and the radial gap.
  • the inside of the step is shrinking.
  • the joint body is integrally formed with the valve stem of the shut-off valve, the valve stem of the shut-off valve is the joint body, and the inner cavity of the joint body includes a vertical passage, and the valve flap is a plurality of elastic tongue flaps wrapped around the end of the joint body, and the joint base is
  • the cavity or the connecting cavity inner cavity stopping wall is a step corresponding to the closed shape of the plurality of elastic tongues, and the inner mouth of the step is an infusion channel, and the plurality of elastic tongues are closed and blocked by the contact with the step Cut off the vertical passage opening of the joint body.
  • the joint body is integrally formed with the shut-off valve stem, the valve stem of the shut-off valve is the joint body, the inner cavity of the joint body includes a vertical passage, the valve flap is located at the vertical passage opening of the joint body end, the joint base cavity or the joint cavity
  • the retaining wall is a pointed cone or a truncated cone which protrudes in the direction of the joint body, and the retaining wall is distributed with a plurality of infusion passages at a circumferential position around the vertical passage opening, by the advancement of the joint body,
  • the conical or truncated-shaped retaining wall projecting central portion projects into the vertical passage of the joint body and blocks the cut-off at the vertical passage opening.
  • the infusion passage on the retaining wall is located at the periphery of the vertical passage opening, that is, in the region outside the diameter of the vertical passage opening, such that when the central portion of the retaining wall is blocked in the vertical passage opening, the retaining wall The infusion channel cannot be connected to the vertical channel and is thus blocked.
  • the present invention has the following advantages over the prior art: the method of preventing negative pressure and eliminating negative pressure is simple, effective, and convenient to operate.
  • the intervention of the stop valve eliminates the negative pressure and cuts off the infusion channel, which is not only more sanitary and safe, but also ensures that the valve stem must be retracted after the infusion is re-injected (otherwise the cut-off valve is closed and cannot be infused). Therefore, the valve stem of the shut-off valve has a space for advancement after the end of the infusion to eliminate the negative pressure.
  • the shut-off valve With the process of gradually closing the valve stem of the shut-off valve, the shut-off valve also functions as a flow regulating valve.
  • the structure of the joint body and the valve stem of the shut-off valve can simultaneously operate the infusion operation and the cut-off operation at the same time, and it is not easy to interfere with each other, and the use is more convenient.
  • FIG. 1 is a schematic structural view of an indwelling needle in the prior art
  • FIG. 2 is a schematic view showing the structure of an indwelling needle using a medical infusion connector with a shut-off valve according to the present invention
  • FIG. 3 is a schematic structural view of a medical infusion connector with a shutoff valve in an off state according to the first embodiment of the present invention
  • FIG. 4 is a schematic structural view of a medical infusion connector with a shutoff valve in an open state according to Embodiment 1 of the present invention
  • FIG. 5 is a schematic structural view of a medical infusion connector having a shutoff valve according to Embodiment 2 of the present invention.
  • Figure 6 is the A direction view of Figure 5.
  • FIG. 7 is a schematic structural view of a medical infusion connector having a shutoff valve according to Embodiment 3 of the present invention.
  • FIG. 8 is a schematic structural view of a medical infusion connector having a shutoff valve according to Embodiment 4 of the present invention.
  • FIG. 9 is a schematic structural view of a medical infusion connector having a shutoff valve according to Embodiment 5 of the present invention.
  • FIG. 10 is a schematic structural view of a medical infusion connector having a shutoff valve according to Embodiment 6 of the present invention.
  • FIG. 11 is a schematic structural view of a medical infusion connector having a shutoff valve according to Embodiment 7 of the present invention.
  • Figure 12 is a schematic view showing the structure of a medical infusion connector having a shutoff valve according to a preferred embodiment of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • an indwelling needle using the medical infusion connector with a shut-off valve comprising a connector 1, a connector body 2, and a connector base 3, sealant plug 5, extension tube 6, stop clip 7 and catheter assembly.
  • a medical infusion connector with a shut-off valve the joint body 2 and the shut-off valve stem 43 are integrally constructed, the shut-off valve stem 43 is the joint body 2, and the joint 1 extends and distributes along the joint base 3 in the axial direction.
  • the connection base 3 and the connector 1 are of a separate structure but are fixed to the connector 1 by a screwing screw 32.
  • the front body of the joint body 2 is inserted into the inner cavity of the joint base 3 and passed through an adjusting screw device 31 Spiral connection with joint base 3, joint body 2 and joint base 3
  • a joint body between the inner chamber 2 spirally adjusts the space for axial displacement, and the inner body of the joint body 2 passes through a shut-off valve 4 It communicates with the inner cavity of the connector.
  • Joint base 3 The inner cavity is a stepped cavity with a small front and a large front.
  • the rear part of the inner wall of the large cavity is provided with an internal thread and a joint body. Adjustable screw connection.
  • the step of the large small cavity joint is a stop wall.
  • the flap 41 of the shut-off valve 4 is located at the end of the joint body, and the sealing surface 42 is the retaining wall of the inner cavity of the joint base.
  • Connector body 2 The inner chamber includes a vertical passage 23, a flap 41
  • the utility model relates to two elastic flaps which are wrapped around the end of the joint body.
  • the inner wall of the joint base is a step corresponding to the closed shape of the plurality of elastic flaps, and the small cavity of the inner mouth of the step is an infusion channel. By the contact with the step, the two elastic tongues close and block the vertical passage of the joint body 23 mouths.
  • the elastic tongue is made of a soft sealing material, and a rear portion thereof is annularly wrapped around a sealing groove at the periphery of the end of the joint body 2 to form a sealing ring, so that the front portion of the joint body 2 and the joint base 3
  • the inner chamber carries a damped mating connection by means of the sealing ring.
  • the above adjustment thread is a trapezoidal thread.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • a medical infusion joint having a shutoff valve the joint body 2 and the shutoff valve stem 43 are integrally constructed, and the shutoff valve stem 43 That is, the joint body 2, the joint 1 extends and distributes along the joint base 3 in the axial direction.
  • the rear end of the joint body 2 is connected to the infusion set, and the joint base 3 and the joint base 1 are separately constructed but fixed to the joint 1 by a screwing screw device 32.
  • the inner cavity has a space for advancing the joint body 2, and the inner cavity of the joint body 2 communicates with the inner cavity of the connecting seat through a shut-off valve 4, and the shut-off valve 4 is disposed in the pushing space of the joint body 2 and is pushed into position by the joint body 2 and the corresponding inner cavity stop wall is closed.
  • Joint base 3 The inner cavity is a stepped cavity with a small front and a large front, and the joint body 2 The front section is telescopically slidably and rotatably inserted into the large cavity, and a damped mating connection is made by a seal ring therebetween.
  • the step of the large small cavity joint is the aforementioned stop wall.
  • Valve flap of shutoff valve 4 41 Located at the end of the joint body, the sealing surface 42 is the stop wall, and the joint body 2 is the valve stem.
  • the body of the joint body 2 includes a vertical passage 23 and a transverse passage 25, and the transverse passage 25 is located at the joint body 2 In the inner core of the end, the end of the joint body 2 is smaller than the inner cavity of the joint base, and the gap 26 between the two serves as an infusion passage communicating with the transverse passage 25, and the joint body 2
  • the tip has a pointed shape, and the stopping wall is a truncated cone corresponding to the pointed cone, and the constricted opening of the truncated step is an infusion passage opening.
  • the shut-off valve When the joint body 2 When the tapered end is in contact with the corresponding tapered step, the shut-off valve is closed; and when the joint body is retracted, the shut-off valve is opened, and the infusion is via the joint body vertical passage 23, the transverse passage 25, and the radial clearance 26 And enter the conical step inside the shrinkage.
  • the buckle device is composed of a bayonet 24 and a sliding slot 33, and the latch 24 is exposed on the side wall of the joint body 2, and the sliding slot 33 correspondingly disposed on the side wall of the joint base 3 and extending through the side wall, the sliding groove 33 is composed of an axial groove and a transverse groove, and the protruding bayonet 24 is sleeved in the sliding groove 33 along the axial groove Push-over joint body 2 Abut the joint base 3 axially by turning the sliding sleeve into the transverse groove.
  • the transverse grooves have a slope, but the oblique angle is smaller than the self-locking angle.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • a medical infusion joint having a shutoff valve the joint body 2 and the shutoff valve stem 43 are integrally formed, and the shutoff valve stem 43 That is, the joint body 2, the joint 1 extends and distributes along the joint base 3 in the axial direction.
  • the rear end of the joint body 2 is connected to the infusion set, and the joint base 3 and the joint base 1 are separately constructed but fixed to the joint 1 by a screwing screw device 32.
  • the inner cavity has a space for advancing the joint body 2, and the inner cavity of the joint body 2 communicates with the inner cavity of the connecting seat through a shut-off valve 4, and the shut-off valve 4 is disposed in the pushing space of the joint body 2 and is pushed into position by the joint body 2 and the corresponding inner cavity stop wall is closed.
  • the front end of the joint body 2 is recessed by a deeper annular groove, and the inner leg of the annular groove is sleeved on the joint base 3
  • the outer groove wall of the annular groove is provided with a thread corresponding to the external thread on the outer peripheral wall of the rear section of the joint base, and the screw connection constitutes the adjusting screw device 31.
  • the rear end surface of the limiting sleeve 27 is provided with a finite stop, and the front end of the joint body is correspondingly provided with a limit stop, and the limit sleeve 27 is fixed to the joint base 3.
  • Connector base 3 An internal thread is provided in the inner cavity of the front opening facing downward to be locked with the corresponding external thread of the connecting seat 1 and constitutes a screwing device 32 .
  • the inner core of the inner cavity protrudes downwardly from a core column having a through passage therein.
  • the through passage is composed of a vertical larger passage and a smaller inclined passage, and the obliquely smaller passage is inclined through the joint base 3
  • the inner cavity with the rear opening facing upward is a stop shoulder which is the aforementioned retaining wall and serves as a sealing surface 42 of the shutoff valve 4.
  • the body of the joint body 2 includes a vertical passage 23, the valve flap 41
  • a plurality of obliquely smaller passage openings are disposed at a circumferential position around the periphery of the vertical passage 23, and the joint body end is closed on the retaining wall by the advancement of the joint body 2, Cut off the vertical channel 23 Connected with a diagonally smaller channel.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • a medical infusion joint having a shut-off valve the joint body 2 and the shut-off valve stem 43 are integrally formed, and the shut-off valve stem 43 That is, the joint body 2, the joint 1 extends and distributes along the joint base 3 in the axial direction.
  • the connection base 3 and the connector 1 are of a separate structure but are fixed to the connector 1 by a screwing screw 32.
  • the front body of the joint body 2 is inserted into the inner cavity of the joint base 3, and the joint body 2
  • the inner chamber communicates with the inner chamber of the connecting seat 1 through a shut-off valve 4.
  • the joint body 2 is composed of a screw rod 21 and a lifting head 22, and a sealing rubber plug 5 connected to the infusion needle tube is located at the end of the screw rod 21, and the auger rod 21
  • the front section is inserted into and screwed into the inner cavity of the lifting head 22, and the auger 21 is also axially connected to the joint base 3, and the lifting head 22 is opposite to the joint base 3
  • the front and rear sliding manner is placed in the inner cavity of the joint base 3.
  • Joint base 3 The inner cavity is a stepped cavity with a large front and a small space.
  • the inner wall of the large cavity is provided with a screwing device 32 and a connecting seat 1
  • the inner wall of the small cavity is provided with a cylindrical hole and a lifting joint 22, and the length of the cylindrical hole is larger than the length of the corresponding section of the lifting head 22, so that the lifting head 22 or even the joint body 2 It has a space for spiral adjustment of axial displacement.
  • the joint body 2 and the inner cavity of the connecting seat 1 have a space for pushing the joint body 2, and the shut-off valve 4 is disposed in the joint body pushing space and is connected to the joint by the joint body which is advanced in position 1
  • the inner cavity retaining wall is closed for contact.
  • the inner body of the joint body 2 includes a inner cavity of the auger 21 and a inner cavity of the lifting head 22, both of which are vertical passages 23, and the valve flap 41 is located at the lifting head 22
  • the vertical passage opening of the end, the inner wall of the connecting seat 1 is a pointed cone or a truncated cone which protrudes in the direction of the joint body, and the retaining wall is distributed at a circumferential position around the vertical passage opening There are multiple infusion channels 11
  • the tapered or truncated-shaped retaining wall projecting convex portion protrudes into the joint body vertical passage 23 and blocks the cut-off at the vertical passage opening.
  • Embodiment 5 is a diagrammatic representation of Embodiment 5:
  • a medical infusion joint having a shutoff valve, the joint body 2 and the shutoff valve stem 43 are integrally formed, and the shutoff valve stem 43 That is, the joint body 2, and the joint 1 is distributed in a direction perpendicularly intersecting the axial direction of the joint base 3.
  • Connection seat 1 The front end is connected to the extension tube 6 of the indwelling conduit, and the joint base 3 is integrally formed with the joint 1 but perpendicularly intersects.
  • the shut-off valve stem 43 is inserted into the inner cavity of the joint base 3 and the joint base 3 Spiral connection.
  • the rear end of the shut-off valve stem 43 is a needleless connector (or a needle connector) that can be connected to the infusion set.
  • the inner core of the valve stem 43 has an axially penetrating inner cavity which serves as an infusion channel.
  • Globe valve stem 43 The outer peripheral surface of the end is covered with a sealing ring, the outer peripheral surface of the sealing ring acts as a valve flap 41, and the sealing valve sealing surface 42 is located at an infusion passage opening perpendicular to the valve stem 43, that is, the connecting seat 1 The cavity of the lumen.
  • the bottom end wall of the inner cavity of the joint base serves as a retaining wall corresponding to the inner cavity.
  • a medical infusion connector having a shutoff valve includes a connector 1, a connector body 2, a connector base 3, and a shutoff valve 4 .
  • the front end of the connector 1 is connected to the extension tube of the indwelling catheter, and the rear end of the connector body 2 is either a needle connector or a needleless connector for connection with the infusion set, the connector body 2, the connector base 3 and the connector 1
  • the positional structural relationship between the three is a three-way structure.
  • the joint body 2 and the joint base 3 are on the same axis, and the joint 1 intersects the two, but the above three are integrally formed.
  • the inner chamber communicates with the inner chamber of the connecting seat 1 through a shut-off valve 4, and the shut-off valve stem 43 is inserted into the inner cavity of the joint base 3 in a pushable and retractable manner and is screwed to the joint base 3.
  • Globe valve stem 43 The tip end has a pointed cone shape, and the corresponding stopping wall at the bottom end of the inner cavity of the joint base is a truncated cone shaped step corresponding to the pointed cone, and the indentation opening of the truncated cone shaped step is the direct infusion passage port and the joint body 2 The inner cavity is penetrated.
  • valve stem 43 When the valve stem is closed 43 When the tapered end is in contact with the corresponding tapered step, the shutoff valve 4 is closed; and when the shutoff valve stem 43 is retracted, the shutoff valve is opened, and the infusion enters the conical step and then enters the inner cavity of the connecting seat 1.
  • Globe valve stem 43 A sealing ring is provided in front of the screw connection section of the joint base.
  • a medical infusion connector having a shutoff valve includes a connector 1, a connector body 2, a connector base 3, and a shutoff valve 4 .
  • the positional relationship between the joint body 2, the joint base 3 and the joint seat 1 is a three-way structure. At this time, the joint 1 and the joint base 3 are on the same axis and the joint body 2 Then, the two intersect with each other, but the above three are integrally constructed.
  • Globe valve stem 43 The tip end has a pointed conical shape, and the corresponding stopping wall at the bottom end of the inner cavity of the joint base is a truncated cone-shaped step corresponding to the pointed cone, and the constricted opening of the truncated-shaped step is the infusion port directly connected to the connecting seat 1 The inner cavity is penetrated.
  • a medical infusion connector having a shutoff valve includes a connector 1, a connector body 2, a connector base 3, and a shutoff valve 4 .
  • the positional relationship between the joint body 2, the joint base 3 and the joint seat 1 is a three-way structure. At this time, the joint 1 and the joint body 2 are on the same axis and the base 3 is connected. Then, the two intersect with each other, but the above three are integrally constructed.
  • the tip of the valve stem 43 has a pointed shape, and the corresponding stopping wall at the bottom end of the inner cavity of the joint base is a pointed cone corresponding to the pointed cone, when the valve stem 43 When the front end head is in contact with the retaining wall, the outer peripheral surface of the valve stem 43 is just closed to close the cavity of the inner cavity of the connecting seat 1 and the cavity of the inner cavity of the joint body 2 to complete the closing of the shutoff valve 4.

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Abstract

一种与体外留置导管接驳的具有截止阀（4）的用于将介质引入体内的医用输液接头，其包括接头基座（3）和截止阀（4），接头基座（3）与连接座（1）一体构造或者接头基座（3）与连接座（1）分体构造但两者固连，接头体（2）内腔通过截止阀（4）与连接座（1）内腔连通。该医用输液接头通过设置截止阀（4），使得在消除负压的同时又截止了输液通道，其从结构上确保了再次输液时必须先退后截止阀阀杆（43），而在输液结束后截止阀阀杆（43）也具有推进的空间以消除负压。随着截止阀阀杆（43）推进而渐次截流的过程，使得截止阀（4）具有流量调节阀的作用。而接头体（2）与截止阀阀杆（43）分体构造的结构，使得能够同时分别操作输液作业和截止作业，两作业间不易发生作业干扰。

Description

具有截止阀的医用输液接头 正文
技术领域
本发明涉及一种将介质引入体内的装置，特别是一种与体外留置导管接驳的具有截止阀的医用输液接头。
背景技术
在临床医疗上，当患者需要多次输液时，通常会使用体外留置导管，人体外留置导管与输液器的驳接方式分为有针和无针驳接。现有技术中的一种有针驳接方式如图 1 所示，医用输液接头由连接座 1 以及与其固接的接头体 2 组成，这种有针驳接的接头体 2 通常又称为肝素帽。输液器针管从接头体 2 顶部的密封胶塞插入。输液终了拔出输液器针管的同时，针管原占据的空间接近真空从而在留置导管内产生复压，血液会从血管倒流进留置导管内，倒流血液造成血液凝固堵塞留置导管，无法再次输液，严重的可能产生血栓，给病患造成伤害。因此，医务人员通常需要取一支带有穿刺针管的封管注射器对留置导管进行冲洗封管，封管操作时注射器针管从肝素帽胶塞穿入，进入肝素帽内腔，必然占据肝素帽内腔空间，而封管结束时，医务人员需要边撤出注射器针管边推注封管液，添补针管占据的空间，以免在留置导管内形成复压。这种操作繁琐且仍然会残留封管液最终无法填补的空间，负压仍会产生，为了弥补这种不足，习惯上在别上止流夹夹紧延长管后，需要将止流夹往导管组件方向滑动，令延长管逐渐被挤压，将延长管内液体挤入留置导管内腔，赶出倒流血液，但止流夹与延长管夹紧时滑动阻力大，拉拔延长管，易将延长管拉长变细，导管组件在留置期间，经多次拉拔，严重的会拉断延长管而造成溢血，加上导管组件留置粘贴在病患身体上，延长管长度有限，要是拉拔不慎，会将导管组件拉脱离病患身体，为了避免上述事故发生，医务人员操作时谨小慎微，有时止流夹拉拔长度不够，还是不能完全保证将导管内血液驱赶干净，故这种操作方式无形增加了医护人员工作量和心理负担。
发明内容
本发明目的在于克服现有技术的不足之处而提供一种可以消除负压且操作方便的具有截止阀的医用输液接头，本发明的进一步目的在于提供一种输液作业和截止作业可同时分别操作且相互间不易发生作业干扰的、使用更加方便的具有截止阀的医用输液接头。
本发明的目的是通过以下途径来实现的。
具有截止阀的医用输液接头，包括连接座和接头体，连接座前端或者与留置导管的延长管接驳或者与输液管接驳，接头体后端与输液器接驳，其组成要点在于：还包括一种接头基座和一种截止阀，此接头基座或者与连接座一体构造或者分体构造但与连接座固接，接头体内腔通过一种截止阀与连接座内腔连通，截止阀阀杆以可推进及后退的方式套置在接头基座内腔中，截止阀阀门或者位于接头基座内腔中或者位于连接座内腔中或者位于接头体内腔中，藉着推进到位以及后退的截止阀阀杆而关闭或开启阀门。
这样接头基座与连接座两者内腔构成一密闭型腔，利用截止阀阀杆轴向推移的进退改变密闭型腔容积大小。截止阀阀杆退后，密闭型腔增大；截止阀阀杆推进，密闭型腔减小，推进到位，输液通道截止。输液工作时，截止阀阀杆先退后，截止阀打开，密闭型腔增大，便于容纳更多液体；输液结束针管退出同时，截止阀阀杆推进，密闭型腔由大变小，从而填补原针管占据的空间，防止负压或者排出导管内血液进入血管以消除负压。这种防止负压及消除负压的方式简单、有效、操作方便。而截止阀的介入，在消除负压的同时又截止了输液通道，不但更加卫生、安全，而且从结构上确保了再次输液时必须先退后截止阀阀杆（否则截止阀截止，无法输液），使得输液结束后截止阀阀杆具有推进的空间以消除负压。而随着截止阀阀杆推进而渐次截流的过程，使得截止阀也具有流量调节阀的作用。
本发明的目的还可以通过以下途径来实现。
无论是无针接驳方式还是有针接驳方式都可以使用本发明所述的这种医用输液接头，即所述的接头体或是一种无针接头或是一种有针接头。
接头体与截止阀阀杆之间的结构关系以及接头基座与连接座的位置结构关系可以进一步优化为：
接头体与截止阀阀杆一体构造，接头体上的与输液器接驳的构造位于截止阀阀杆的尾端，截止阀阀杆具有内腔并作为接头体内腔通过截止阀阀门与连接座内腔连通，此时，连接座或者沿接头基座轴向延伸并分布或者沿与接头基座轴向交叉的方向分布。
这种接头体与截止阀阀杆一体构造的结构方式使结构简化。
或者：
接头体与截止阀阀杆分体构造，接头体或者与接头基座固接或者与连接座固接。
这种接头体与截止阀阀杆分体构造的结构方式，可同时分别操作输液作业和截止作业且相互间不易发生作业干扰，使用将更加方便。
关于这种分体构造可以进一步优化为：
接头体、接头基座以及连接座三者之间的位置结构关系呈一种三通构造，此时，或者接头体与接头基座处于同一轴线上而连接座则与该二者交叉，或者接头体与连接座处于同一轴线上而接头基座则与该二者交叉，或者连接座与接头基座处于同一轴线上而接头体则与该二者交叉。
截止阀阀杆可以有多种方式套置在接头基座内腔中：
还包括有一种螺旋调节轴向推移的装置，藉着这种装置截止阀阀杆得以以可推进及后退的方式与接头基座进行套接。
这样通过螺旋调节轴向推移的装置实现截止阀阀杆相对接头基座的轴向的推移和后退。
螺旋调节轴向推移的装置有多种具体的构造可供选择，以下公开其中的两种，一种是：
截止阀阀杆插置在接头基座内腔中并与接头基座螺旋连接。
这样，转动截止阀阀杆让截止阀阀杆相对接头基座螺旋转动，从而让截止阀阀杆相对接头基座螺旋式前进和螺旋式后退。
截止阀阀杆与接头基座螺旋连接段的前方设置有一种内密封件。
上述螺旋调节轴向推移的装置的再一种具体构造可以是：
截止阀阀杆由螺旋杆和升降头组成，螺旋杆前段插置在升降头内腔中并与其螺旋连接，螺旋杆还与接头基座轴向限位连接，升降头以可相对接头基座前后滑移的方式套置在接头基座的内腔中。
这样，由于螺旋杆被轴向限位，螺旋转动被分解成空转和前后移动，其中空转由螺旋杆完成，前后移动则由升降头完成。这种构造尤其适合应用在接头体与截止阀阀杆一体构造的结构方式上，此时与针管接驳的密封胶塞或者位于螺旋杆尾端或者位于升降头尾端。
除了螺旋调节轴向推移的装置以外，截止阀阀杆还可以以这种方式套置在接头基座内腔中：
截止阀阀杆以可伸缩滑移方式插置在接头基座内腔中，截止阀阀杆与接头基座内腔藉着二者之间的密封圈进行带有阻尼的配合连接。
这种带有阻尼的配合连接既可以实现密封，也可以增强手感并可粘滞接头体。
还包括有一种用于限定滑移到位的截止阀阀杆难以再轴向移位的卡扣装置，此卡扣装置安装在截止阀阀杆与接头基座内腔之间。
无论是退后还是推进的截止阀阀杆，一旦滑移到位，在下次输液作业之前希望不再滑动该截止阀阀杆，卡扣装置可用于定位截止阀阀杆使其不易自行轴向移位。
这种卡扣装置有多种具体的构造可供选择，以下公开其中的两种，一种是：
卡扣装置是一种弹性卡扣，由嵌置在接头基座侧壁上的卡扣、弹簧以及对应设置在截止阀阀杆侧壁上的卡槽组成，藉着弹簧的预紧力卡扣与滑移到位的卡槽卡接。
这种弹性卡扣即可实现定位，又可在推拉力的作用下脱离卡接。
另一种是：
截止阀阀杆以可伸缩滑移且可转动方式插置在接头基座内腔中，卡扣装置由卡销及滑动槽组成，卡销突露在接头体侧壁上，滑动槽对应设置在接头基座内腔侧壁上，滑动槽由轴向槽和横向槽组成，突露的卡销头滑套在滑动槽中，沿着轴向槽推移到位的截止阀阀杆藉着转动滑套入横向槽中而与接头基座轴向卡接。
横向槽具有斜度，但斜角小于自锁角。
斜度便于导引入轴向槽，而小于自锁角可防止其在轴向力的作用下自行滑动。
关于截止阀的进一步优化是：
截止阀的阀瓣位于截止阀阀杆端头，截止阀密封面或者位于接头基座内腔止进壁上或者位于连接座内腔止进壁上或者位于接头体内腔止进壁上。
阀瓣与密封面触接接合处即为阀门。
关于截止阀阀门的进一步优化是：
截止阀阀杆端头呈一种尖锥形，对应内腔止进壁是一种与该尖锥形对应的圆台形台阶，该圆台形台阶的内缩口是输液通道口。
当截止阀阀杆尖锥形端头与对应的锥形台阶触接时，截止阀闭合；而当截止阀阀杆后退，截止阀开启，输液进入锥形台阶内缩口。
或者：
截止阀阀杆端部外周面包覆有密封圈，此密封圈外周面作为阀瓣，截止阀密封面位于与阀杆垂直的输液通道口。
当接头体与截止阀阀杆一体构造时，截止阀以及相应的输液通道可以进一步优化以下几种具体构造：
接头体与截止阀阀杆一体构造，截止阀阀杆即为接头体，接头体内腔包括竖向通道和横向通道，横向通道位于接头体端部内芯中，接头体端部小于接头基座内腔，二者之间的间隙作为输液通道与横向通道连通，接头体端头呈一种尖锥形，接头基座内腔或者连接座内腔止进壁是一种与该尖锥形对应的圆台形台阶，该圆台形台阶的内缩口是输液通道口。
当接头体尖锥形端头与对应的锥形台阶触接时，截止阀闭合；而当接头体后退，截止阀开启，输液经由接头体竖向通道、横向通道、径向间隙而进入锥形台阶内缩口。
接头体与截止阀阀杆一体构造，截止阀阀杆即为接头体，接头体内腔包括竖向通道，阀瓣是一种包覆在接头体端头的复数个弹性舌瓣，接头基座内腔或者连接座内腔止进壁是一种与该复数个弹性舌瓣闭合形状对应的台阶，台阶内口是输液通道，藉着与该台阶的触接，复数个弹性舌瓣闭合并封堵截止在接头体竖向通道口。
这样，接头体推进到位，弹性舌瓣闭合，截止阀截止；接头体后退抬起，弹性舌瓣因自身弹性而打开，截止阀开启。
接头体与截止阀阀杆一体构造，截止阀阀杆即为接头体，接头体内腔包括竖向通道，阀瓣位于接头体端头的竖向通道口，接头基座内腔或者连接座内腔止进壁是一种中部往接头体方向突凸的尖锥形或圆台形，该止进壁在竖向通道口外围的圆周位置上分布有复数个输液通道，藉着接头体的推进，该尖锥形或圆台形的止进壁突凸中部伸入到接头体竖向通道并封堵截止在该竖向通道口。
由于止进壁上的输液通道位于竖向通道口的外围，即位于竖向通道口口径以外的区域，这样，当止进壁突凸中部封堵在竖向通道口时，该止进壁上的输液通道无法与竖向通道连通，从而被截止。
综上所述，本发明相比现有技术具有如下优点：防止负压及消除负压的方式简单、有效、操作方便。而截止阀的介入，在消除负压的同时又截止了输液通道，不但更加卫生、安全，而且从结构上确保了再次输液时必须先退后截止阀阀杆（否则截止阀截止，无法输液），使得输液结束后截止阀阀杆具有推进的空间以消除负压。而随着截止阀阀杆推进而渐次截流的过程，使得截止阀也具有流量调节阀的作用。而接头体与截止阀阀杆分体构造的结构方式，可同时分别操作输液作业和截止作业且相互间不易发生作业干扰，使用将更加方便。
附图说明
图 1 是现有技术中一种留置针的结构示意图
图 2 是使用本发明所述具有截止阀的医用输液接头的留置针结构示意图
图 3 是本发明实施例一所述具有截止阀的医用输液接头在截止状态的的结构示意图
图 4 是本发明实施例一所述具有截止阀的医用输液接头在开启状态的结构示意图
图 5 是本发明实施例二所述具有截止阀的医用输液接头的结构示意图
图 6 是图 5 的 A 向视图
图 7 是本发明实施例三所述具有截止阀的医用输液接头的结构示意图
图 8 是本发明实施例四所述具有截止阀的医用输液接头的结构示意图。
图 9 是本发明实施例五所述具有截止阀的医用输液接头的结构示意图。
图 10 是本发明实施例六所述具有截止阀的医用输液接头的结构示意图。
图 11 是本发明实施例七所述具有截止阀的医用输液接头的结构示意图。
图 12 是本发明最佳实施例所述具有截止阀的医用输液接头的结构示意图。
标号说明
1 连接座 11 输液通道 2 接头体 21 螺旋杆 22 升降头 23 竖向通道 24 卡销 25 横向通道 26 间隙 27 限位套
3 接头基座 31 调节螺旋装置 32 旋紧螺旋装置 33 滑动槽 4 截止阀 41 阀瓣 42 密封面 43 阀杆 5 密封胶塞 6 延长管 7 止流夹 8 导管组件 9 接头外套。
具体实施方式
实施例一：
参照图 2 ，一种使用本发明所述具有截止阀的医用输液接头的留置针，由连接座 1 、接头体 2 、接头基座 3 、密封胶塞 5 、延长管 6 、止流夹 7 和导管组件组成。
参照图 3 和图 4 ，具有截止阀的医用输液接头，接头体 2 与截止阀阀杆 43 一体构造，截止阀阀杆 43 即为接头体 2 ，连接座 1 沿接头基座 3 轴向延伸并分布。包括连接座 1 、接头体 2 和接头基座 3 ，连接座前端与留置导管的延长管 6 接驳，接头基座 3 与连接座 1 分体构造但通过一种旋紧螺旋装置 32 与连接座 1 固接。接头体 2 前段插置在接头基座 3 内腔中并通过一种调节螺旋装置 31 与接头基座 3 螺旋连接，接头体 2 与接头基座 3 内腔之间之间具有接头体 2 螺旋调节轴向推移的空间，接头体 2 内腔通过一种截止阀 4 与连接座内腔连通。接头基座 3 内腔为一种前小后大的阶梯型腔，大型腔内壁后段设置进退内螺纹与接头体 2 可调节螺旋连接。大小型腔接合部的台阶是一种止进壁。截止阀 4 的阀瓣 41 位于接头体端头，密封面 42 即是接头基座内腔的该止进壁。接头体 2 内腔包括竖向通道 23 ，阀瓣 41 是一种包覆在接头体端头的两个弹性舌瓣，接头基座内腔止进壁是一种与该复数个弹性舌瓣闭合形状对应的台阶，台阶内口的小型腔是输液通道，藉着与该台阶的触接，两个弹性舌瓣闭合并封堵截止在接头体竖向通道 23 口。此弹性舌瓣由软质密封材料制成，其后段呈环状环围固定在接头体 2 端部外围的密封槽中并形成一种密封圈，从而让接头体 2 前段与接头基座 3 内腔藉着该密封圈进行带有阻尼的配合连接。上述调节螺纹是一种梯形螺纹。
本实施例未述部分与现有技术相同。
实施例二：
参照图 5 ，具有截止阀的医用输液接头，接头体 2 与截止阀阀杆 43 一体构造，截止阀阀杆 43 即为接头体 2 ，连接座 1 沿接头基座 3 轴向延伸并分布。包括连接座 1 、接头体 2 和接头基座 3 ，连接座 1 前端与留置导管的延长管 6 接驳，接头体 2 后端与输液器接驳，接头基座 3 与连接座 1 分体构造但通过一种旋紧螺旋装置 32 与连接座 1 固接。接头体 2 与接头基座 3 内腔之间具有接头体 2 推进的空间，接头体 2 内腔通过一种截止阀 4 与连接座内腔连通，此截止阀 4 设置在上述接头体 2 推进空间中并藉着推进到位的接头体 2 而与对应内腔止进壁截止触接。接头基座 3 内腔为一种前小后大的阶梯型腔，接头体 2 前段以可伸缩滑移且可转动方式插置在该大型腔中，并藉着二者之间的密封圈进行带有阻尼的配合连接。大小型腔接合部的台阶就是前述的止进壁。截止阀 4 的阀瓣 41 位于接头体端头，密封面 42 就是该止进壁，接头体 2 又是阀杆。接头体 2 内腔包括竖向通道 23 和横向通道 25 ，横向通道 25 位于接头体 2 端部内芯中，接头体 2 端部小于接头基座内腔，二者之间的间隙 26 作为输液通道与横向通道 25 连通，接头体 2 端头呈一种尖锥形，前述止进壁是一种与该尖锥形对应的圆台形台阶，该圆台形台阶的内缩口是输液通道口。
当接头体 2 尖锥形端头与对应的锥形台阶触接时，截止阀闭合；而当接头体后退，截止阀开启，输液经由接头体竖向通道 23 、横向通道 25 、径向间隙 26 而进入锥形台阶内缩口。
参照图 6 ，卡扣装置由卡销 24 及滑动槽 33 组成，卡销 24 突露在接头体 2 侧壁上，滑动槽 33 对应设置在接头基座 3 内腔侧壁上并贯穿侧壁，滑动槽 33 由轴向槽和横向槽组成，突露的卡销 24 头滑套在滑动槽 33 中，沿着轴向槽推移到位的接头体 2 藉着转动滑套入横向槽中而与接头基座 3 轴向卡接。横向槽具有斜度，但斜角小于自锁角。
本实施例未述部分与实施例一相同。
实施例三：
参照图 7 ，具有截止阀的医用输液接头，接头体 2 与截止阀阀杆 43 一体构造，截止阀阀杆 43 即为接头体 2 ，连接座 1 沿接头基座 3 轴向延伸并分布。包括连接座 1 、接头体 2 和接头基座 3 ，连接座 1 前端与留置导管的延长管 6 接驳，接头体 2 后端与输液器接驳，接头基座 3 与连接座 1 分体构造但通过一种旋紧螺旋装置 32 与连接座 1 固接。接头体 2 与接头基座 3 内腔之间具有接头体 2 推进的空间，接头体 2 内腔通过一种截止阀 4 与连接座内腔连通，此截止阀 4 设置在上述接头体 2 推进空间中并藉着推进到位的接头体 2 而与对应内腔止进壁截止触接。接头体 2 前端头内凹一较深的环形槽，此环形槽内侧的芯柱滑套在接头基座 3 后段开口朝上的内腔中，此环形槽的外槽壁设置螺纹与接头基座后段外周壁上的外螺纹对应螺旋连接，该螺旋连接组成调节螺旋装置 31 。而接头体 2 前段又陷落在限位套 27 的内腔中，限位套 27 后端面设置有限位止口，接头体前端对应设置限位挡肩，限位套 27 与接头基座 3 固接。接头基座 3 前段开口朝下的内腔中设置内螺纹与连接座 1 的对应外螺纹锁接并组成旋紧螺旋装置 32 。该内腔中芯向下突伸一芯柱，此芯柱内中具有贯穿通道，此贯穿通道由竖向较大通道以及斜向的较小通道组成，斜向较小通道倾斜贯穿接头基座 3 后段开口朝上的内腔，贯穿处为一挡肩，此挡肩为前述的止进壁并作为截止阀 4 的密封面 42 。接头体 2 内腔包括竖向通道 23 ，阀瓣 41 为接头体端头，共有复数个斜向较小通道口设置在该竖向通道 23 口外围的圆周位置上，藉着接头体 2 的推进，该接头体端头盖合在止进壁上，截止了竖向通道 23 与斜向较小通道的连通。
本实施例未述部分与实施例一相同。
实施例四：
参照图 8 ，具有截止阀的医用输液接头，接头体 2 与截止阀阀杆 43 一体构造，截止阀阀杆 43 即为接头体 2 ，连接座 1 沿接头基座 3 轴向延伸并分布。包括连接座 1 、接头体 2 和接头基座 3 ，连接座 1 前端与留置导管的延长管 6 接驳，接头基座 3 与连接座 1 分体构造但通过一种旋紧螺旋装置 32 与连接座 1 固接。接头体 2 前段插置在接头基座 3 内腔中，接头体 2 内腔通过一种截止阀 4 与连接座 1 内腔连通。接头体 2 由螺旋杆 21 和升降头 22 组成，与输液针管接驳的密封胶塞 5 位于螺旋杆 21 尾端，螺旋杆 21 前段插置在升降头 22 内腔中并与其螺旋连接，螺旋杆 21 还与接头基座 3 轴向限位连接，升降头 22 以可相对接头基座 3 前后滑移的方式套置在接头基座 3 的内腔中。接头基座 3 内腔为一种前大后小的阶梯型腔，大型腔内壁设置旋紧螺旋装置 32 与连接座 1 对应部分锁接，小型腔内壁设置圆柱孔与升降头 22 间隙配合套接，该圆柱孔长度大于升降头 22 对应段落的长度，从而使升降头 22 乃至接头体 2 具有螺旋调节轴向推移的空间。圆柱孔与旋紧螺旋装置 32 之间具有一挡肩，一种内密封件安装在此挡肩之前，升降头的前端穿过此该内密封件的内孔突伸入连接座 1 内腔中。接头体 2 与连接座 1 内腔之间具有接头体 2 推进的空间，截止阀 4 设置在上述接头体推进空间中并藉着推进到位的接头体而与连接座 1 内腔止进壁截止触接。接头体 2 内腔包括螺旋杆 21 内腔和升降头 22 内腔，都是竖向通道 23 ，阀瓣 41 位于升降头 22 端头的竖向通道口，前述连接座 1 内腔止进壁是一种中部往接头体方向突凸的尖锥形或圆台形，该止进壁在竖向通道口外围的圆周位置上分布有复数个输液通道 11 ，藉着接头体 2 的推进，该尖锥形或圆台形的止进壁突凸中部伸入到接头体竖向通道 23 并封堵截止在该竖向通道口。由于止进壁上的输液通道 11 位于竖向通道口的外围，即位于竖向通道口口径以外的区域，这样，当止进壁突凸中部封堵在竖向通道口时，该止进壁上的输液通道 11 无法与竖向通道 23 连通，从而被截止。
本实施例未述部分与实施例一相同。
实施例五：
参照图 9 ，具有截止阀的医用输液接头，接头体 2 与截止阀阀杆 43 一体构造，截止阀阀杆 43 即为接头体 2 ，连接座 1 沿与接头基座 3 轴向垂直交叉的方向分布。包括连接座 1 、接头体 2 、接头基座 3 和截止阀 4 。连接座 1 前端与留置导管的延长管 6 接驳，接头基座 3 与连接座 1 一体构造但二者垂直交叉。截止阀阀杆 43 插置在接头基座 3 内腔中并与接头基座 3 螺旋连接。截止阀阀杆 43 后端部是一种无针接头（也可是有针接头），可与输液器接驳。阀杆 43 内芯中空具有轴向贯穿的内腔，此内腔作为输液通道。截止阀阀杆 43 端部外周面包覆有密封圈，此密封圈外周面作为阀瓣 41 ，截止阀密封面 42 位于与阀杆 43 垂直的输液通道口，即连接座 1 内腔的腔口。接头基座内腔的底端壁作为对应内腔的止进壁，当阀杆 43 前端头与该止进壁触接时，上述密封圈外周面恰正截止关闭连接座 1 内腔的腔口完成截止阀 4 的关闭。
本实施例未述部分与现有技术相同。
实施例六：
参照图 10 ，具有截止阀的医用输液接头，包括连接座 1 、接头体 2 、接头基座 3 以及截止阀 4 。连接座 1 前端与留置导管的延长管接驳，接头体 2 后端或是一种有针接头或是一种无针接头可与输液器接驳，接头体 2 、接头基座 3 以及连接座 1 三者之间的位置结构关系呈一种三通构造，此时，接头体 2 与接头基座 3 处于同一轴线上而连接座 1 则与该二者交叉，但上述三者一体构造。接头体 2 内腔通过一种截止阀 4 与连接座 1 内腔连通，截止阀阀杆 43 以可推进及后退的方式插置在接头基座 3 内腔中并与接头基座 3 螺旋连接。截止阀阀杆 43 端头呈一种尖锥形，接头基座内腔底端的对应止进壁是一种与该尖锥形对应的圆台形台阶，该圆台形台阶的内缩口是输液通道口直接与接头体 2 内腔贯通。当截止阀阀杆 43 尖锥形端头与对应的锥形台阶触接时，截止阀 4 闭合；而当截止阀阀杆 43 后退，截止阀开启，输液进入锥形台阶内缩口并进而进入连接座 1 内腔。截止阀阀杆 43 与接头基座 3 螺旋连接段的前方设置有一种密封圈。
本实施例未述部分与现有技术相同。
实施例七：
参照图 11 ，具有截止阀的医用输液接头，包括连接座 1 、接头体 2 、接头基座 3 以及截止阀 4 。接头体 2 、接头基座 3 以及连接座 1 三者之间的位置结构关系呈一种三通构造，此时，连接座 1 与接头基座 3 处于同一轴线上而接头体 2 则与该二者交叉，但上述三者一体构造。截止阀阀杆 43 端头呈一种尖锥形，接头基座内腔底端的对应止进壁是一种与该尖锥形对应的圆台形台阶，该圆台形台阶的内缩口是输液通道口直接与连接座 1 内腔贯通。
本实施例未述部分与实施例六相同。
最佳实施例：
参照图 12 ，具有截止阀的医用输液接头，包括连接座 1 、接头体 2 、接头基座 3 以及截止阀 4 。接头体 2 、接头基座 3 以及连接座 1 三者之间的位置结构关系呈一种三通构造，此时，连接座 1 与接头体 2 处于同一轴线上而接基座 3 则与该二者交叉，但上述三者一体构造。截止阀阀杆 43 端头呈一种尖锥形，接头基座内腔底端的对应止进壁是一种与该尖锥形对应的尖锥形，当阀杆 43 前端头与该止进壁触接时，阀杆 43 外周面恰正截止关闭连接座 1 内腔的腔口以及接头体 2 内腔的腔口从而完成截止阀 4 的关闭。
本实施例未述部分与实施例六相同。

Claims (19)

  1. 具有截止阀的医用输液接头，包括连接座和接头体，连接座前端或者与留置导管的延长管接驳或者与输液管接驳，接头体后端与输液器接驳，其特征在于，还包括一种接头基座和一种截止阀，此接头基座或者与连接座一体构造或者分体构造但与连接座固接，接头体内腔通过一种截止阀与连接座内腔连通，截止阀阀杆以可推进及后退的方式套置在接头基座内腔中，截止阀阀门或者位于接头基座内腔中或者位于连接座内腔中或者位于接头体内腔中，藉着推进到位以及后退的截止阀阀杆而关闭或开启阀门。
  2. 根据权利要求1所述的具有截止阀的医用输液接头，其特征在于，接头体与截止阀阀杆一体构造，接头体上的与输液器接驳的构造位于截止阀阀杆的尾端，截止阀阀杆具有内腔并作为接头体内腔通过截止阀阀门与连接座内腔连通，此时，连接座或者沿接头基座轴向延伸并分布或者沿与接头基座轴向交叉的方向分布。
  3. 根据权利要求1所述的具有截止阀的医用输液接头，其特征在于，接头体与截止阀阀杆分体构造，接头体或者与接头基座固接或者与连接座固接。
  4. 根据权利要求3所述的具有截止阀的医用输液接头，其特征在于，接头体、接头基座以及连接座三者之间的位置结构关系呈一种三通构造，此时，或者接头体与接头基座处于同一轴线上而连接座则与该二者交叉，或者接头体与连接座处于同一轴线上而接头基座则与该二者交叉，或者连接座与接头基座处于同一轴线上而接头体则与该二者交叉。
  5. 根据权利要求1所述的具有截止阀的医用输液接头，其特征在于，还包括有一种螺旋调节轴向推移的装置，藉着这种装置截止阀阀杆得以以可推进及后退的方式与接头基座进行套接。
  6. 根据权利要求5所述的具有截止阀的医用输液接头，其特征在于，截止阀阀杆插置在接头基座内腔中并与接头基座螺旋连接。
  7. 根据权利要求5或6所述的具有截止阀的医用输液接头，其特征在于，截止阀阀杆与接头基座螺旋连接段的前方设置有一种内密封件。
  8. 根据权利要求5所述的具有截止阀的医用输液接头，其特征在于，截止阀阀杆由螺旋杆和升降头组成，螺旋杆前段插置在升降头内腔中并与其螺旋连接，螺旋杆还与接头基座轴向限位连接，升降头以可相对接头基座前后滑移的方式套置在接头基座的内腔中。
  9. 根据权利要求1所述的具有截止阀的医用输液接头，其特征在于，截止阀阀杆以可伸缩滑移方式插置在接头基座内腔中，截止阀阀杆与接头基座内腔藉着二者之间的密封圈进行带有阻尼的配合连接。
  10. 根据权利要求1所述的具有截止阀的医用输液接头，其特征在于，截止阀阀杆以可伸缩滑移方式插置在接头基座内腔中，截止阀阀杆与接头基座内腔藉着二者之间的密封圈进行带有阻尼的配合连接，还包括有一种用于限定滑移到位的截止阀阀杆难以再轴向移位的卡扣装置，此卡扣装置安装在截止阀阀杆与接头基座内腔之间。
  11. 根据权利要求10所述的具有截止阀的医用输液接头，其特征在于，卡扣装置是一种弹性卡扣，由嵌置在接头基座侧壁上的卡扣、弹簧以及对应设置在截止阀阀杆侧壁上的卡槽组成，藉着弹簧的预紧力卡扣与滑移到位的卡槽卡接。
  12. 根据权利要求10所述的具有截止阀的医用输液接头，其特征在于，截止阀阀杆以可伸缩滑移且可转动方式插置在接头基座内腔中，卡扣装置由卡销及滑动槽组成，卡销突露在接头体侧壁上，滑动槽对应设置在接头基座内腔侧壁上，滑动槽由轴向槽和横向槽组成，突露的卡销头滑套在滑动槽中，沿着轴向槽推移到位的截止阀阀杆藉着转动滑套入横向槽中而与接头基座轴向卡接。
  13. 根据权利要求12所述的具有截止阀的医用输液接头，其特征在于，横向槽具有斜度，但斜角小于自锁角。
  14. 根据权利要求1所述的具有截止阀的医用输液接头，其特征在于，截止阀的阀瓣位于截止阀阀杆端头，截止阀密封面或者位于接头基座内腔止进壁上或者位于连接座内腔止进壁上或者位于接头体内腔止进壁上。
  15. 根据权利要求14所述的具有截止阀的医用输液接头，其特征在于，截止阀阀杆端头呈一种尖锥形，对应内腔止进壁是一种与该尖锥形对应的圆台形台阶，该圆台形台阶的内缩口是输液通道口。
  16. 根据权利要求1所述的具有截止阀的医用输液接头，其特征在于，截止阀阀杆端部外周面包覆有密封圈，此密封圈外周面作为阀瓣，截止阀密封面位于与阀杆垂直的输液通道口。
  17. 根据权利要求1所述的具有截止阀的医用输液接头，其特征在于，接头体与截止阀阀杆一体构造，截止阀阀杆即为接头体，接头体内腔包括竖向通道和横向通道，横向通道位于接头体端部内芯中，接头体端部小于接头基座内腔，二者之间的间隙作为输液通道与横向通道连通，接头体端头呈一种尖锥形，接头基座内腔或者连接座内腔止进壁是一种与该尖锥形对应的圆台形台阶，该圆台形台阶的内缩口是输液通道口。
  18. 根据权利要求1所述的具有截止阀的医用输液接头，其特征在于，接头体与截止阀阀杆一体构造，截止阀阀杆即为接头体，接头体内腔包括竖向通道，阀瓣是一种包覆在接头体端头的复数个弹性舌瓣，接头基座内腔或者连接座内腔止进壁是一种与该复数个弹性舌瓣闭合形状对应的台阶，台阶内口是输液通道，藉着与该台阶的触接，复数个弹性舌瓣闭合并封堵截止在接头体竖向通道口。
  19. 根据权利要求1所述的具有截止阀的医用输液接头，其特征在于，接头体与截止阀阀杆一体构造，截止阀阀杆即为接头体，接头体内腔包括竖向通道，阀瓣位于接头体端头的竖向通道口，接头基座内腔或者连接座内腔止进壁是一种中部往接头体方向突凸的尖锥形或圆台形，该止进壁在竖向通道口外围的圆周位置上分布有复数个输液通道，藉着接头体的推进，该尖锥形或圆台形的止进壁突凸中部伸入到接头体竖向通道并封堵截止在该竖向通道口。
PCT/CN2013/080777 2013-08-03 2013-08-03 具有截止阀的医用输液接头 WO2015017961A1 (zh)

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