WO2012041200A1 - 防回血输液器用排气装置 - Google Patents

防回血输液器用排气装置 Download PDF

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Publication number
WO2012041200A1
WO2012041200A1 PCT/CN2011/080169 CN2011080169W WO2012041200A1 WO 2012041200 A1 WO2012041200 A1 WO 2012041200A1 CN 2011080169 W CN2011080169 W CN 2011080169W WO 2012041200 A1 WO2012041200 A1 WO 2012041200A1
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WO
WIPO (PCT)
Prior art keywords
tube
infusion
return blood
exhaust device
return
Prior art date
Application number
PCT/CN2011/080169
Other languages
English (en)
French (fr)
Inventor
戎静华
Original Assignee
Rong Jinghua
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rong Jinghua filed Critical Rong Jinghua
Publication of WO2012041200A1 publication Critical patent/WO2012041200A1/zh

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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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/36—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests with means for eliminating or preventing injection or infusion of air into body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
    • A61J1/14—Details; Accessories therefor
    • A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
    • A61J1/2089—Containers or vials which are to be joined to each other in order to mix their contents
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/36—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests with means for eliminating or preventing injection or infusion of air into body
    • A61M5/38—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests with means for eliminating or preventing injection or infusion of air into body using hydrophilic or hydrophobic filters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
    • A61J1/14—Details; Accessories therefor
    • A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
    • A61J1/2003—Accessories used in combination with means for transfer or mixing of fluids, e.g. for activating fluid flow, separating fluids, filtering fluid or venting
    • A61J1/2006—Piercing means
    • A61J1/201—Piercing means having one piercing end
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
    • A61J1/14—Details; Accessories therefor
    • A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
    • A61J1/2003—Accessories used in combination with means for transfer or mixing of fluids, e.g. for activating fluid flow, separating fluids, filtering fluid or venting
    • A61J1/2068—Venting means
    • A61J1/2072—Venting means for internal venting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
    • A61J1/14—Details; Accessories therefor
    • A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
    • A61J1/2003—Accessories used in combination with means for transfer or mixing of fluids, e.g. for activating fluid flow, separating fluids, filtering fluid or venting
    • A61J1/2079—Filtering means
    • A61J1/2082—Filtering means for gas filtration

Definitions

  • the invention relates to an exhaust device for a disposable infusion set, in particular to an exhaust device for an anti-return blood infusion device. Background technique
  • the current anti-return blood infusion device has no exhaust device. In use, it is necessary to manually remove the excess air in the anti-return blood dropper or the Mofei's tube, and the time for extruding the exhaust gas generally takes more than 20 seconds, which is obviously reduced. Work efficiency. Summary of the invention
  • An object of the present invention is to provide an exhaust apparatus for an anti-return blood infusion set which is simple in structure, low in cost, and simplifies an exhaust operation.
  • An anti-return blood infusion device for preventing blood infusion
  • the anti-return blood infusion device is a blood return dropper, or a combination of an anti-return blood dropper and a Mohd tube
  • the exhaust device comprises a base, an air filter membrane and a sealing plug One end of the base is connected to the side wall of the anti-return blood dropper and/or the Mohd tube, and the other end is connected with the sealing plug that can be opened and closed, and the air filter membrane is fixed on the base. Inside the seat.
  • a vent pipe is added or extended between the base and the hollow tube, and the length of the vent pipe ensures that the air filter membrane in the exhaust device is in the infusion during use. Above the highest infusion level in the bottle, use the pressure principle to prevent the infusion from overflowing the filter membrane;
  • the stopper of the anti-return blood infusion device When the stopper of the anti-return blood infusion device is connected to the infusion bottle, during the process of hanging the infusion bottle, when the anti-returning dropper is not vertical, the anti-return buoy in the anti-return dropper may not have been Drop to the lower end of the anti-return dropper and seal it. If the anti-return dropper is not sealed, it will start to vent, and it is easy to cause gas and liquid inclusions in the lower infusion tube.
  • the venting apparatus of the embodiment of the present invention since the tail end of the venting means has a sealing plug, the venting means can be sealed in advance, and the above phenomenon can be prevented.
  • the air filter membrane for the infusion set since the air filter membrane for the infusion set is installed in the exhaust device, the risk of air pollution inside the infusion set which is not conformed to the infusion set standard is eliminated.
  • the mechanism is to prevent the air from passing through the tension of the liquid adsorbed on the filter membrane to keep the infusion at a constant height to avoid the occurrence of blood return.
  • the infusion is not stopped after a certain period of time, or if it is subjected to vibration or shaking, the drug solution adsorbed on the filter membrane will disappear, so that the filter membrane can restore the air penetration performance and make the infusion. Pipe intake. When this happens, the gas entering the infusion tube must be removed, otherwise a blood clot will form once it enters the body.
  • a waterproof air filter is installed on the outer conical joint to realize the function of discharging this part of the air. To prevent air from entering the body and causing blood clots.
  • FIG. 1 is a schematic structural view of a first embodiment of an exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a second embodiment of an exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • FIG 3 is a schematic structural view of a third embodiment of an exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural view of a fourth embodiment of an exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural view of a fifth embodiment of an exhaust apparatus for an anti-return blood infusion device according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural view of a sixth embodiment of an exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • Fig. 7 is a schematic structural view showing a seventh embodiment of an exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural view of Embodiment 8 of an exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • Fig. 9 is a schematic structural view showing a ninth embodiment of an exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural view of a tenth embodiment of an exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • Figure 11 is a schematic view showing the structure of an eleventh embodiment of an exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • Fig. 12 is a schematic structural view showing a twelfth embodiment of an exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural view of a thirteenth embodiment of an exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • Figure 14 is a schematic view showing the structure of a fourteenth embodiment of an exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • Figure 15 is a schematic view showing the structure of a fifteenth embodiment of an exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • Figure 16 is a schematic view showing the structure of a sixteenth embodiment of an exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • Figure 17 is a schematic view showing the structure of the seventeenth embodiment of the exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • Fig. 18 is a schematic view showing the structure of an eighteenth embodiment of an exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • Fig. 19 is a schematic view showing the structure of a nineteenth embodiment of an exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • Fig. 20 is a schematic structural view showing a twentieth embodiment of an exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • Fig. 21 is a schematic structural view showing the twenty-first embodiment of the exhaust apparatus for an anti-return blood infusion device according to an embodiment of the present invention.
  • Figure 22 is a schematic view showing the structure of an embodiment of an exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • Figure 23 is a schematic view showing the structure of the twenty-third embodiment of the exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • Fig. 24 is a view showing the structure of a twenty-fourth embodiment of an exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention.
  • Figure 25 is a schematic view showing the structure of the twenty-fifth embodiment of the exhaust apparatus for an anti-return blood infusion set according to an embodiment of the present invention. detailed description
  • an embodiment of the present invention provides an exhaust device for an anti-return blood infusion device, wherein the anti-return blood infusion device 1 is an anti-return blood dropper lc, or an anti-return blood dropper lc and a Mohoff tube.
  • the venting device includes a base 3, an air filter membrane 4 and a sealing plug 5, one end of which is connected to the anti-backwater dropper lc and/or the Mohs tube of the anti-return blood transfusion device 1.
  • the other end is connected with an openable and sealing plug 5, and the air filter membrane 4 is fixed in the base 3, for example, the air filter membrane 4 is tightly closed by ultrasonic or heat sealing or gluing. It fits on the base 3.
  • the air filter membrane 4 may be a gas permeable, watertight filter membrane or a gas permeable, water permeable membrane.
  • the base 3 can be made of a hard plastic.
  • the venting device since the venting device is installed on the side wall of the anti-return blood pipette lc and/or the Mohd tube lb of the anti-return blood transfusion device 1, when the anti-return blood transfusion device 1 is protected against the blood dropper lc or After the infusion liquid level in the tube lb rises until the exhaust port is completely immersed, the anti-return blood pipette lc of the anti-return blood infusion set 1 or the infusion water level in the Mofei's tube lb stops rising, and the anti-return blood of the blood return infusion device 1 is prevented.
  • the venting device since the venting device is installed on the side wall of the anti-return blood dropper 1c or the Mohd tube lb of the anti-return blood infusion set 1, it is possible to ensure observation and adjustment of the drip of the infusion without using an object such as a vent needle. speed, Therefore, the exhaust device has a simple structure, low cost, and shortened exhaust time.
  • the venting means may be joined by a hollow tube 2 formed extending from the side wall of the anti-return dropper lc or the Mohd tube lb.
  • the anti-return blood infusion set 1 shown in Figs. 3 to 11 and Figs. 16 to 19 is a case of the blood drop preventing tube lc.
  • the anti-return blood infusion set 1 shown in Fig. 1 to Fig. 2, Fig. 12 to Fig. 15, Fig. 20 to Fig. 25 is a combination of the Mohs tube lb and the anti-return dropper l c .
  • the venting device can be installed in the upper tube and can be located between 1/2 and 2/3 of the tube height. Position, for example, if the Mohs tube lb is attached above the anti-return pipette lc, then the venting device is mounted on the Mohs tube lb and is located 1/2 to 2/3 of the tube height of the Mohd tube lb In the position between, if the anti-return blood pipette lc is connected above the Mohs tube lb, the exhaust device is installed on the anti-return pipette lc, and can be located at 1/2 of the pipe height of the anti-return pipette lc Position between 2/3.
  • the anti-return blood infusion set 1 is a combination of the Mohd tube lb and the anti-return blood drip tube lc
  • the Mo Fei's tube lb and the anti-return blood drop tube lc are connected through the neck, then the Mohd tube lb
  • An exhaust device can be installed on the anti-return dropper lc, as shown in Figures 20-25.
  • the venting device mounted on the Moffier tube lb is located between 1/2 and 2/3 of the tube height of the Mohd tube lb.
  • the exhaust device installed on the anti-return blood pipette lc can be installed at any position of 1/2 or more of the pipe height of the anti-return pipette lc, as shown in Fig. 22, Fig. 24 and Fig. 25;
  • the tube lc is connected above the Mohs tube lb, and then the exhaust device mounted on the anti-return blood pipette lc is located at any position of 1/2 or more of the tube height of the anti-return blood pipette lc, and is mounted on the Mofei's tube lb.
  • the venting means can be mounted at a position between 1/2 and 2/3 of the tube height of the Moffier tube lb as shown in Figs. 20, 21 and 23.
  • the limitation of the position of the exhaust device in this embodiment can further ensure that the drip rate of the infusion can be accurately observed.
  • the Mo Fei's tube lb and the anti-return blood pipette lc are connected by a hollow net or a plate, and the Mofei's tube lb is located above the anti-return blood pipette lc, then only the exhaust gas is required to be connected to the Mofei's tube lb.
  • the device may be because the hollow mesh or plate has a larger diameter relative to the neck, and the air in the lower anti-return pipette lc may be discharged from the exhaust device installed on the Moffier tube 1b during infusion.
  • the use process of the embodiment of the present invention will be described by taking the blood infusion inflator 1 as an anti-return dropper lc as an example:
  • the sealing plug 5 is in a closed state, and then normal operation before the infusion set is exhausted (for example, the infusion set is connected under the infusion bottle 7, and the infusion bottle 7 is hung), in the blood return prevention
  • the infusion set 1 is hung down, it is observed whether the anti-return buoyant la in the anti-return blood pipette lc has fallen back to the bottom of the anti-return pipette lc and sealed, and the sealing plug 5 is opened after the sealing is confirmed.
  • the liquid in the infusion bag (or infusion bottle) is input into the anti-return blood pipette lc or the Mohs tube lb of the anti-return blood infusion device 1, and the air therein follows the hollow tube 2 and the air filter membrane 4 Go out.
  • the air filter membrane 4 is a gas permeable, watertight filter membrane, then the liquid level of the blood infusion drop tube lc or the Mohd tube lb of the anti-return blood infusion device 1 rises to the hollow tube with the discharge of air.
  • the top of the opening of 2 After the position, the anti-return blood pipette lc of the anti-return blood infusion set 1 or the air in the Mohd tube lb is stopped, so that the infusion liquid level is maintained at a constant height.
  • the sealing plug 5 can be closed or it can still be turned on; if the infusion set is in a swaying state, the sealing plug 5 needs to be closed, because the infusion
  • the air filter membrane 4 is automatically vented, and the exhaust gas will cause the anti-return blood pipette 1c or the Mohd tube lb of the anti-return blood infusion device 1.
  • the infusion level rises too far from the top of the anti-backwater dropper lc or the Mohd tube lb of the anti-return blood infusion set 1, for example, the infusion level exceeds the tube height of the tube in which the exhaust unit is installed. After the second, it is easy to cause difficulty in the observation of the drip rate, so that the drop rate cannot be observed and the speed of the drop can not be adjusted, which brings inconvenience to the treatment.
  • the infusion in the venting device is returned to the anti-return blood dropper of the anti-return blood transfusion device 1 as the blood infusion drop lc or the infusion water level in the Mohs tube lb drops.
  • the exhaust device is automatically released from the seal, and the anti-returning float is dropped as the infusion in the anti-return drip tube lc decreases, and finally the lower end of the anti-return dropper lc is sealed.
  • the barrier air enters the lower infusion tube under the anti-return blood pipette lc, preventing the infusion from overcoming the pressure of the vein and causing blood return.
  • the air filter membrane 4 is a gas permeable, water permeable filter membrane, after the seal plug 5 is opened, when the liquid level of the infusion liquid rises to more than half of the tube height of the tube to which the exhaust device is installed, it has not risen.
  • the embodiment shown in Figs. 1 and 2 means that the anti-return blood pipette lc or the Mohd tube lb that has not risen to the anti-return blood infusion device 1 and the lower end of the opening of the exhaust device have not been raised. Then, the sealing plug 5 needs to be plugged to prevent the infusion solution from overflowing the outside of the discharge device through the air filtering membrane 4.
  • the method of use is as follows: When the Mohd tube lb is connected above the anti-return blood pipette lc, the anti-return blood buoy will be After the bottom of the anti-return blood pipette lc is sealed, the sealing plug 5 of the exhaust device on the Mofei's tube lb is first opened, and the exhaust of the Mofei's tube lb is completed while the liquid is being sucked. At this time, the Mofe's tube lb and the anti-return blood are eliminated.
  • the connection between the dropper lc is relatively small, the infusion tension can hold the infusion and not go down, because the lower anti-return buoy has sealed the lower end of the anti-return dropper, so the infusion and air can not pass.
  • the neck port is downward, so when the venting device of the anti-return blood pipette lc is not opened, the air and the infusion in the Mofe's tube lb do not enter the anti-return pipette lc; when the Mofe's tube lb After the exhausting is completed, the sealing plug 5 of the exhaust device of the anti-return blood pipette lc is opened to complete the exhaust of the anti-return blood pipette lc.
  • the other operation method and the anti-return blood infusion device 1 are the anti-return blood pipette lc. The situation is the same.
  • the sealing plug 5 of the exhaust device on the anti-return blood pipette lc is first opened.
  • the anti-return blood pipette lc is exhausted.
  • the anti-return blood floating plug l is floated up, and then the sealing plug 5 of the exhaust device of the Mofei's tube lb is opened, and the infusion gradually enters the Mofei's tube.
  • the exhaust device on the Mohd tube lb begins to vent until the end of the exhaust.
  • the anti-return blood pipette lc of the anti-return blood infusion set 1 or the flow regulator (not shown) on the lower infusion tube 9 below the Mohd tube lb is closed.
  • the liquid and gas cannot pass, and the flow regulator can be turned on after the exhaust is completed, so that no gas can enter the human body from the intravenous infusion needle.
  • the sealing plug 5 is connected to the base 3 via a connecting piece 5a, and a sealing ring 6 is arranged between the sealing plug 5 and the base 3.
  • the connecting piece 5a may be a soft connecting piece
  • the sealing ring 6 refers to a sealing ring made of a sealing soft rubber for an infusion set that conforms to the Pharmacopoeia standard.
  • the base 3 is provided with a first hollow body 3a and a second hollow body 3b, and the first and second hollow bodies 3a, 3b are respectively located on both sides of the air filter membrane 4 .
  • the first and second hollow bodies 3a, 3b are used to support the air filter membrane 4.
  • the first and second hollow bodies 3a, 3b may respectively be hollowed out plates, or nets, or vertical cells.
  • the base 3 can be horizontally disposed, that is, the center line of the base 3 and the anti-backwater dropper lc are perpendicular to each other, as shown in FIG. 1, at this time, the first and second hollow bodies 3a, 3b are fixed at right and left positions.
  • the sealing plug 5 contacts the first hollow body 3a in a closed state.
  • the pedestal 3 can also be arranged vertically, that is, the center line of the pedestal 3 and the anti-return blood pipette lc are parallel to each other, as shown in FIG. 2, at this time, the first and second hollow bodies 3a, 3b are fixed at the upper and lower positions.
  • the sealing plug 5 contacts the first hollow body 3a in a closed state.
  • This embodiment is a further improvement based on the first embodiment, and the details are as follows:
  • the exhaust device when the base 3 is vertically disposed, the exhaust device further includes a third hollow body 3c, and the third hollow body 3c is disposed in the base 3 and located at the Below the second hollow body 3b, a sealing float 3d is disposed between the second and third hollow bodies 3b, 3c, and a distance between the second and third hollow bodies 3b, 3c is greater than the sealed floating plug 3d.
  • the height, so that the sealing float 3d can float up and down with the liquid surface, the outer side of the upper portion of the sealing float 3d and the interior of the base 3 are located between the second hollow body 3b to the third hollow body 3c.
  • the shape and size of the inner side of the upper portion are matched to achieve an anastomotic seal.
  • the sealing float 3d can be sealed on the outer surface, the inner part is hollow, the upper part is in the shape of a truncated cone body, the lower part is a cylinder body, and the cylinder can be a circular crown or a semi-spherical sphere. Sealing the surface of the floating plug 3d
  • the outer surface of the upper part is made of a soft rubber for the infusion set that conforms to the Pharmacopoeia standard.
  • the other parts of the sealing float 3d are made of hard plastic.
  • the upper part is in the shape of a truncated cone
  • the lower part is in the shape of a cylinder
  • the lower part is in the shape of a cylinder to ensure more Buoyancy, and requires a minimum volume between the second hollow body and the third hollow body to accommodate it.
  • the height of the sealing float 3d should satisfy: the diameter of the circumcircle of the central longitudinal section of the sealing float 3d is larger than the cylinder of the interior of the base 3 between the second hollow plate 3b and the third hollow plate 3c.
  • the height of the floating plug 3d is sealed to ensure that the floating plug 3d does not roll over and invert in the base 3 during storage and use.
  • the third hollow body 3c may be formed to extend from the hollow tube 2, as shown in FIG. 4, or the third hollow body 3c is adhesively mounted at the lower end of the base 3, as shown in the figure. 5 is shown.
  • the air filter membrane 4 in the present embodiment may be a gas permeable, water permeable filter membrane.
  • the third hollow body 3c may be a hollow plate, or a mesh, or a vertical grid.
  • the liquid in the infusion bag is input into the anti-return blood infusion device 1, and the air therein is discharged along with the hollow tube 2 and the air filter membrane 4, and the liquid also follows the hollow tube. 2 and the air filter membrane 4 is discharged to the outside, and the liquid gradually enters the base 3.
  • the sealing float 3d floats as the liquid level in the base 3 rises until the outer side of the upper portion of the sealing float 3d and the outer shape of the outer surface of the floating plug 3d match the shape of the outer surface of the floating plug 3d.
  • the air in the anti-return blood transfusion device 1 stops discharging, and prevents the infusion from continuing to surge upward and overflows through the air filter membrane 4 to the outside of the exhaust device, thereby maintaining the infusion liquid level at a constant height. .
  • the sealing plug 5 is closed, and if it is not shaken, it is not necessary to close the sealing plug 5.
  • the liquid in the infusion bag When the liquid in the infusion bag is dripped, the liquid in the anti-return blood infusion device 1 gradually decreases, and the liquid in the base 3 of the exhaust device returns to the anti-return blood infusion device as the infusion water level in the anti-return blood infusion device 1 decreases.
  • the sealing float 3d is lowered to open the sealed end, and the exhaust device is automatically released from the seal.
  • the sealing float 3d since the structure of the sealing float 3d is added to the exhaust device, the sealing float 3d floats up and down by the buoyancy of the infusion, so that the base 3 of the exhaust device can be automatically sealed and automatically unsealed.
  • This embodiment is a further improvement based on the first embodiment, and the details are as follows:
  • the exhaust device when the base 3 is vertically disposed, the exhaust device further includes a vent pipe 2a, and one end of the vent pipe 2a is connected to the outer end of the hollow pipe 2 (refer to The hollow tube 2 is away from the end of the anti-return blood infusion set 1 , and the other end of the vent tube 2 a is connected to the base 3 , that is, the base 3 communicates with the hollow tube 2 via the vent tube 2 a , The position of the air filter membrane 4 is not lower than the highest liquid level in the infusion bottle 7 connected above the blood-returning infusion set 1.
  • the air filter membrane 4 in the present embodiment may be a gas permeable, water permeable filter membrane.
  • the liquid in the infusion bag is input into the anti-return blood infusion device 1, and the air in the anti-return blood infusion device 1 is discharged along with the hollow tube 2 and the air filter membrane 4, and the liquid also follows
  • the hollow tube 2 and the air filter membrane 4 are discharged to the outside, and gradually enter the susceptor 3 and the vent pipe 2a. Since the position of the air filter membrane 4 is not lower than the highest liquid level in the infusion bottle 7, the liquid in the vent pipe 2a cannot reach the position of the air filter membrane 4, so that the infusion overflow is effectively prevented.
  • the liquid in the infusion bag When the liquid in the infusion bag is dripped, the liquid in the anti-return blood infusion device 1 gradually decreases, and the liquid in the base 3 of the exhaust device and the vent pipe 2a is returned to the liquid in the anti-return blood infusion device 1 to fall.
  • the exhaust device In the anti-return blood infusion set 1, the exhaust device is automatically released from sealing at this time.
  • the hollow tube 2 and the vent tube 2a may be connected separately, as shown in FIG. 5 and FIG. 6, the lower end of the vent tube 2a is sleeved on the end of the hollow tube 2, and the upper end To connect the base 3, the length of the vent tube 2a is such that the height of the air filter membrane 4 is not lower than the highest infusion level in the infusion bottle 7 during use.
  • the hollow tube 2 and the snorkel 2a can also be made in one piece, as shown in Figure 7.
  • the upper end side of the vent pipe 2a is provided with a hook 2b or a clip.
  • the infusion bottle 7 can be hung on the side object by the hook 2b or the clip to make the exhaust device
  • the position of the air filter membrane 4 is not lower than or higher than the position of the infusion liquid level of the infusion bottle 7.
  • the present embodiment is a further improvement based on any of the above embodiments, and is specifically as follows: As shown in FIG. 9 to FIG. 16, the hollow tube 2 is a medicinal tube 2c, and one end of the medicated tube 2c Connecting the anti-return blood dropper 1C of the anti-return blood infusion set 1 or the side wall of the Mohd tube lb, and the other end is connected with a sealing soft rubber 2d for facilitating dosing, and the exhaust device is installed at the upper end of the medicated tube 2c .
  • an intermediate portion of the medicinal tube 2c extends upwardly from a connecting tube 2e, and the venting means is mounted at the upper end of the connecting tube 2e.
  • the upper end of the connecting pipe 2e may be an exhaust device including only the base 3, the first and second hollow bodies 2a, 2b and the air filter membrane 4 (that is, the exhaust gas shown in the first embodiment). a device), as shown in FIG. 12; or may be an exhaust device (that is, the exhaust device shown in Embodiment 2) further including a third hollow body 3c and a sealing float 3d, at which time the base 3 is disposed at
  • the upper end of the connecting pipe 2e is as shown in Fig. 11; or the exhausting device including the vent pipe 2a (that is, the exhausting device shown in Embodiment 3), at which the lower end of the vent pipe 2a communicates with the connecting pipe 2e, the upper end Connect the base 3 as shown in Figure 10.
  • the medicated tube 2c is coupled to the venting means via a hollow needle 2f, as shown in Figures 9, 14-16. Specifically, the lower end of the venting means is closed, one end of the hollow needle 2f is inserted into the sealing soft rubber 2d of the medicinalnating tube 2c, and the other end is inserted into the lower end of the venting means. The liquid medicine in the charging tube 2c can flow into the exhaust device through the hollow needle 2f.
  • Embodiment 5 is the same as those of the first, second, or third embodiments, and will not be described again.
  • Embodiment 5 is the same as those of the first, second, or third embodiments, and will not be described again.
  • the exhaust device further includes an exhaust passage 8, one end of the exhaust passage 8
  • the base 3 is connected to the other end, and the other end is provided with an opening.
  • the lateral position of the opening is located in a central region of the anti-return blood infusion device 1, and the longitudinal position is located at 1/2 of the tube height of the tube to which the exhaust device is mounted. To a position between 2/3.
  • the exhaust passage 8 may be formed integrally with the base 3.
  • the opening is located below the exhaust passage 8, and the opening may be a bell mouth 8a, as shown in Fig. 17, or a straight port 8b, as shown in Figs.
  • the initial discharge port (here, the opening) of the gas in the exhaust device is extended from the anti-backwater dropper lc of the anti-return blood infusion set 1 or the inner wall of the Mohd tube lb. Central area, this can be prevented Due to the inclination of the anti-return blood pipette lc or the Mohd tube lb of the infusion set 1 , the infusion set continues to be exhausted outward, and the anti-return blood pipette lc of the anti-return blood infusion set 1 or the infusion water level in the Mohd tube lb is biased. high.
  • the liquid level in the anti-return blood transfusion device 1 is substantially close to a straight line, so the gas The initial discharge port does not deviate from the anti-return blood pipette 1 of the anti-return blood infusion device 1 or a large distance above the liquid surface of the Mohs tube lb, and the sealing plug of the end of the base 3 of the exhaust device is not required in use. 5 plug, you can prevent the rise of the internal infusion water level.
  • the infusion liquid surface is not in a straight line or close to a straight line, and the sealing is required at this time.
  • the plug 5 is plugged to prevent the anti-return blood pipette 1C of the anti-return blood infusion device 1 or the infusion liquid surface in the Mohd tube lb from being higher than the initial discharge port of the gas discharge, and the liquid level rises, and the drip rate is difficult to observe.
  • the neck of the upper end of the anti-return blood transfusion device 1 is provided with a nozzle 8c for injecting the infusion to the inner wall of the anti-return blood dropper 1C or the Mohs tube lb of the anti-return blood transfusion device 1. This prevents the inhalation that is sucked into the exhaust device from dripping directly into the gas discharge port when the exhaust device is exhausted, and the exhaust gas passage 8 contains the infusion and the exhaust gas is difficult.
  • the present embodiment is a further improvement based on any of the above embodiments, and is specifically as follows: As shown in FIGS. 17 to 19, the lower end of the anti-return blood dropper 1c of the anti-return blood infusion device 1 is connected to the lower infusion tube 9
  • the lower infusion tube 9 is provided with an outer conical joint 9a
  • the outer conical joint 9a has a receiving cavity 9b
  • the top of the outer conical joint 9a has an upper cover 9c
  • the upper cover 9c is provided with an upper cover
  • the opening 9d is provided with a waterproof air filter membrane 9e below the upper cover 9c
  • the bottom of the outer conical joint 9a is tapered.
  • the waterproof air filter membrane 9e can be precisely attached to the upper cover 9c by ultrasonic or heat sealing or gluing.
  • the sealing plug 5 before the sealing plug 5 is opened, it is necessary to ensure that the anti-return blood floating plug la is returned to the bottom of the anti-return blood pipette lc to seal it, and then the infusion bottle 7 can be dropped into the anti-return blood infusion solution.
  • the infusion bottle 7 can be dropped into the anti-return blood infusion solution.
  • An intermittent chamber may be provided between the waterproof air filter membrane 9e and the upper cover 9c so that air can be discharged from the upper cover opening 9d more smoothly.
  • the sealing plug 5 is directly opened, that is, it is not necessary to ensure the anti-return blood floating before opening the sealing plug 5.
  • the plug falls back to the bottom of the anti-return blood pipette lc to seal it, because if air enters the anti-return blood infusion device 1 through the exhaust device, the air mixed infusion water is discharged together into the lower infusion tube 9, and the outer The conical joint 9a can enter the lower infusion tube 9 Air is expelled from the upper cover opening 9d to prevent air from entering the intravenous infusion needle to ensure the safety of the infusion.
  • the air when the air enters the lower infusion tube 9, it is first trapped at the upper end of the liquid filtering membrane 9f. Since the infusion is heavier than the air, the air is distributed thereon because the upper infusion continuously flows into the outer conical joint 9a. Inside, finally, the air is completely discharged from the upper cover opening 9d to the outer conical joint 9a, so that the air does not pass through the liquid chemical filtration film 9f in the outer conical joint 9a, thereby posing a threat to the human body.
  • the anti-return dropper lc has two types of floating plug type (as shown in Figs. 1 to 16, and Fig. 19) and anti-bleeding filter type (shown in Figs. 17 and 18). That is to say, the floating plug type anti-return blood pipette lc is provided with an anti-return blood floating plug la, and the anti-return blood dripping tube lc of the anti-return blood filter membrane is provided with an anti-return blood filter membrane ld.
  • the lower part of the anti-return blood floating plug 1a of the floating plug type anti-return blood pipette lc is a sealant. Once the lower end of the anti-return blood pipette lc is sealed, no matter how much time, how much degree of severe shaking or vibration is experienced. Does not make it lose its anti-return function.
  • the anti-return blood filter membrane Id of the anti-bleeding filter type anti-return blood pipette lc utilizes the tension of the infusion, that is, the membrane on the surface of the bubble to prevent blood return, so the anti-return function can only last for ten minutes, and When the barrier air enters the lower infusion tube 9, the anti-return blood infusion device 1 cannot be subjected to strong vibration or bombardment.
  • the anti-bleeding filter type anti-return blood pipette lc of the above-described anti-bleeding filter type is combined with the structure of the outer conical joint 9a of the present embodiment, and when the anti-return blood filter type anti-backwater dropper lc encounters the above-mentioned loss of the barrier air, After the external factor acts, the waterproof air filter membrane 9e and the upper lid opening 9d can be used to automatically remove the air entering the lower infusion tube 9, thereby ensuring the safety of use.

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Abstract

本发明实施例公开了一种防回血输液器用排气装置，其包括基座，空气过滤膜和密封塞，所述基座的一端连通在所述防回血输液器侧壁凸伸出的中空管上，另一端连接有可开、合的所述密封塞，所述空气过滤膜固定在所述基座内。本发明实施例的结构简单，成本低，简化了排气操作。

Description

防回血输液器用排气装置
技术领域
本发明涉及一次性输液器的排气装置， 尤其涉及一种防回血输液器用的排气装置。 背景技术
目前的防回血输液器没有排气装置， 它在使用中， 需要人工将防回血滴管或者莫非氏 管内多余的空气排掉， 而且一般完成挤压排气的时间需要二十秒以上， 明显降低了工作效 率。 发明内容
本发明的目的是， 提供一种防回血输液器用排气装置， 其结构简单， 成本低， 简化了 排气操作。
本发明的上述目的可采用下列技术方案来实现：
一种防回血输液器用排气装置， 所述防回血输液器为防回血滴管， 或者为防回血滴管 与莫非氏管的组合； 所述排气装置包括基座， 空气过滤膜和密封塞， 所述基座的一端连接 在所述防回血滴管和 /或莫非氏管的侧壁上， 另一端连接有可开、 合的所述密封塞， 所述空 气过滤膜固定在所述基座内。
本发明实施例的排气装置的特点和优点是：
一、 简化防回血输液器的排气操作。 现有技术的防回血输液器， 排气时需要用手指挤 压防回血滴管， 将空气挤入输液瓶， 然后从输液瓶内吸入药液， 通过连续数次的挤压和吸 液， 才能完成排气。 本发明实施例的排气装置安装在防回血输液器上后， 输液前， 在防回 血滴管或莫非氏管， 在需要排气时打开该排气装置尾端的密封塞， 空气就自动持续的排出。
本发明实施例在排气时， 吸液也同时进行。 当空气排到设定的量时它就自动停止向外 排。 为防止排气装置在排气结束后向外溢输液， 又设计了四种方案：
1、 使用透气、 不透水的过滤膜， 自动阻止输液外溢；
2、 使用透气、 透水的空气过滤膜， 在它下面设置第二镂空体， 第三镂空体和一个可以 随药液升降的密封浮塞， 当密封浮塞上升到一定高度时， 其上部外侧面与基座上的位于第 二镂空体到第三镂空体之间的上部的内侧面吻合形成密封效果， 自动阻止输液外溢；
3、 当使用的空气过滤膜为透气、 透水时， 在基座和中空管之间增加或者延伸形成一通 气管， 该通气管道长度确保在使用中， 使排气装置内的空气过滤膜位于输液瓶内最高输液 液面之上， 利用压力原理， 防止输液溢出过滤膜；
4、 当它里面使用的空气过滤膜为透气、 透水时， 它的基座和中空管相接， 在输液液面 上升到空气过滤膜位置之前， 用手将密封塞塞上。
不管上述哪种方案， 它们都能实现自动排气， 无须人工挤压防回血滴管排气， 简化了 操作。
二、 缩短了排气时间。 现有技术的防回血输液器在排气时， 吸液和排气不能同时进行， 如果给它安装上本发明实施例的排气装置后， 就可以克服这样的缺点， 因此该排气装置将 缩短防回血输液器在排气时所需的时间。
三、 运行安全。 当防回血输液器的瓶塞穿剌器接入输液瓶后， 在把输液瓶向上挂的过 程中， 当防回血滴管还没有竖直时， 防回血滴管内的防回血浮塞不一定已经下落到防回血 滴管的低端并将之密封住。 如果在防回血滴管没有被密封时就开始排气， 容易使其下的输 液管内出现气体和液体夹杂现象。 但是安装上本发明实施例的排气装置后， 由于该排气装 置的尾端有一个密封塞， 可以事先使排气装置处于密封状态， 可以防止出现上述现象。 另 外因为在该排气装置中安装了输液器专用的空气过滤膜， 排除了输液器内部被外面的不符 合输液器标准的空气污染的隐患。
对于使用防回血过滤膜以实现防回血功能的防回血输液器， 它的机理是利用过滤膜上 吸附的药液的张力阻止了空气通过而使输液停留在恒定的高度， 以避免回血的发生。 但是 如果输液自停后， 超过了一定的时间不去处理它， 或者经受振动或者晃动时， 会使过滤膜 上吸附的药液消失， 因此使过滤膜重新恢复空气穿透的性能而使下输液管进气。 当这种情 况发生时， 必须排除下输液管内进入的气体， 否则一旦进入人体就会产生血栓。 本专利在 外圆锥接头上安装了一个防水空气过滤器， 可以实现将这部分空气排出的功能。 以防止空 气进入人体造成血栓。 附图说明
为了更清楚地说明本发明实施例中的技术方案， 下面将对实施例描述中所需要使用的 附图作简单地介绍， 显而易见地， 下面描述中的附图仅仅是本发明的一些实施例， 对于本 领域普通技术人员来讲， 在不付出创造性劳动的前提下， 还可以根据这些附图获得其他的 附图。
图 1为本发明实施例的防回血输液器用排气装置实施例一的结构示意图。
图 2为本发明实施例的防回血输液器用排气装置实施例二的结构示意图。
图 3为本发明实施例的防回血输液器用排气装置实施例三的结构示意图。
图 4为本发明实施例的防回血输液器用排气装置实施例四的结构示意图。
图 5为本发明实施例的防回血输液器用排气装置实施例五的结构示意图。
图 6为本发明实施例的防回血输液器用排气装置实施例六的结构示意图。
图 7为本发明实施例的防回血输液器用排气装置实施例七的结构示意图。
图 8为本发明实施例的防回血输液器用排气装置实施例八的结构示意图。
图 9为本发明实施例的防回血输液器用排气装置实施例九的结构示意图。
图 10为本发明实施例的防回血输液器用排气装置实施例十的结构示意图。
图 11为本发明实施例的防回血输液器用排气装置实施例十一的结构示意图。 图 12为本发明实施例的防回血输液器用排气装置实施例十二的结构示意图。
图 13为本发明实施例的防回血输液器用排气装置实施例十三的结构示意图。
图 14为本发明实施例的防回血输液器用排气装置实施例十四的结构示意图。
图 15为本发明实施例的防回血输液器用排气装置实施例十五的结构示意图。
图 16为本发明实施例的防回血输液器用排气装置实施例十六的结构示意图。
图 17是本发明实施例的防回血输液器用排气装置实施例十七的结构示意图。
图 18是本发明实施例的防回血输液器用排气装置实施例十八的结构示意图。
图 19是本发明实施例的防回血输液器用排气装置实施例十九的结构示意图。
图 20是本发明实施例的防回血输液器用排气装置实施例二十的结构示意图。
图 21是本发明实施例的防回血输液器用排气装置实施例二十一的结构示意图。
图 22是本发明实施例的防回血输液器用排气装置实施例二十二的结构示意图。
图 23是本发明实施例的防回血输液器用排气装置实施例二十三的结构示意图。
图 24是本发明实施例的防回血输液器用排气装置实施例二十四的结构示意图。
图 25是本发明实施例的防回血输液器用排气装置实施例二十五的结构示意图。 具体实施方式
下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案进行清楚、 完整地 描述， 显然， 所描述的实施例仅仅是本发明一部分实施例， 而不是全部的实施例。 基于本 发明中的实施例， 本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实 施例， 都属于本发明保护的范围。
实施方式一
如图 1-图 3所示， 本发明实施例提出了一种防回血输液器用排气装置， 所述防回血输 液器 1为防回血滴管 lc， 或者为防回血滴管 l c与莫非氏管 lb的组合； 所述排气装置包括 基座 3， 空气过滤膜 4和密封塞 5， 所述基座 3的一端连接所述防回血输液器 1的防回血滴 管 lc和 /或莫非氏管 lb侧壁上， 另一端连接有可开、 合的密封塞 5， 所述空气过滤膜 4固 定在所述基座 3内， 例如使空气过滤膜 4利用超声或热合或胶合的方法将之紧密的贴合在 基座 3上。
其中， 所述空气过滤膜 4可为透气、 不透水式的过滤膜， 或者为透气、 透水式的过滤 膜。 所述基座 3可由硬塑料制成。
本发明实施例中， 由于排气装置安装在防回血输液器 1的防回血滴管 lc和 /或莫非氏 管 lb的侧壁上，因此当防回血输液器 1的防回血滴管 lc或莫非氏管 lb内的输液液面上升 到将其排气口全部浸没后， 防回血输液器 1的防回血滴管 lc或莫非氏管 lb内的输液水位 停止上升， 防回血输液器 1的防回血滴管 lc或莫非氏管 lb内留有一部分的空气柱子， 可 以观察到输液的滴速。 进一步而言， 由于排气装置安装在防回血输液器 1的防回血滴管 lc 或莫非氏管 lb的侧壁上， 不需要借助排气针之类的物件就能保证观察和调整输液的滴速， 因此， 该排气装置结构简单， 成本低， 排气时间缩短。
具体来说， 所述排气装置可通过从所述防回血滴管 lc或莫非氏管 lb的侧壁上延伸形 成的中空管 2相接。 进一步而言， 图 3-图 11和图 16-图 19所示的防回血输液器 1为防回 血滴管 lc的情况。 图 1-图 2， 图 12-图 15， 图 20-图 25所示的防回血输液器 1为莫非氏 管 lb与防回血滴管 l c的组合的情况。
当防回血输液器 1为莫非氏管 lb与防回血滴管 lc的组合时， 所述排气装置可以安装 在位于上方的管内， 并可位于管高的 1/2到 2/3之间的位置上， 例如， 如果莫非氏管 lb连 接在防回血滴管 lc的上方， 那么排气装置则安装在莫非氏管 lb上， 并位于莫非氏管 lb的 管高的 1/2到 2/3之间的位置上， 如果防回血滴管 lc连接莫非氏管 lb的上方， 那么排气 装置则安装在防回血滴管 lc上， 并可位于防回血滴管 lc的管高的 1/2到 2/3之间的位置 上。
当防回血输液器 1为莫非氏管 lb与防回血滴管 lc的组合时，如果莫非氏管 lb与防回 血滴管 lc之间是通过颈部相连接的，那么在所述莫非氏管 lb和防回血滴管 l c上均可安装 有排气装置， 参见图 20-图 25所示。例如， 如果莫非氏管 lb连接在防回血滴管 l c的上方， 那么安装在莫非氏管 lb上的排气装置位于莫非氏管 lb的管高的 1/2到 2/3之间的位置上， 安装在防回血滴管 lc上的排气装置则可以安装在防回血滴管 lc的管高的 1/2以上的任何 部位， 如图 22、 图 24和图 25所示； 如果防回血滴管 lc连接莫非氏管 lb的上方， 那么安 装在防回血滴管 lc上的排气装置位于防回血滴管 lc的管高的 1/2以上的任何位置上， 安 装在莫非氏管 lb上的排气装置则可以安装在莫非氏管 lb的管高的 1/2到 2/3之间的位置 上， 如图 20、 图 21和图 23所示。
本实施例中对排气装置的位置所做的限定，可进一步保证能准确地观察到输液的滴速。 此外， 如果莫非氏管 lb与防回血滴管 l c之间是通过镂空网或板连接的， 且莫非氏管 lb位 于防回血滴管 lc的上方， 那么只需要在莫非氏管 lb上连接排气装置即可， 这是因为镂空 网或板相对于颈部而言直径较大， 输液时， 位于下方的防回血滴管 lc内的空气可从莫非氏 管 lb上安装的排气装置中排出。
下面为了说明的方便， 以防回血输液器 1为防回血滴管 lc为例来说明本发明实施例的 使用过程：
首先在输液器撕开包装后， 所述密封塞 5处于闭合状态， 接着进行输液器排气前的正 常操作（例如输液器连接在输液瓶 7下方， 并挂好输液瓶 7)， 在防回血输液器 1向下挂时， 观察防回血滴管 lc内的防回血浮塞 la是否已经回落到防回血滴管 lc的底部并将之密封 住， 确认密封后将密封塞 5打开。 打开密封塞 5后， 输液袋 （或输液瓶） 内的液体输入防 回血输液器 1的防回血滴管 l c或莫非氏管 lb内， 其内的空气随着中空管 2和空气过滤膜 4往外排。
接着， 如果空气过滤膜 4为透气、 不透水式的过滤膜， 那么当防回血输液器 1的防回 血滴管 lc或莫非氏管 lb内的输液液面随空气的排出而上升到中空管 2的开口处的最上方 的位置后， 防回血输液器 1的防回血滴管 lc或莫非氏管 lb内的空气停止排出， 从而使输 液液面维持在恒定的高度。 此时， 如果在输液器处于不摇摆晃动状态， 密封塞 5可关闭， 也可仍旧使之处于开启状态； 如果输液器处于摇摆晃动的状态， 则需要将密封塞 5关闭， 这是因为， 输液器在摆动时， 只要中空管 2的开口处位于液面之上， 空气过滤膜 4就会自 动排气， 排气就会造成防回血输液器 1的防回血滴管 lc或莫非氏管 lb输液水位的上升， 如果输液水位与防回血输液器 1的防回血滴管 lc或莫非氏管 lb的顶部距离太小后， 例如 输液水位超过排气装置所安装的管的管高的三分之二后， 就容易导致滴速观察的困难， 这 样即无法观察到滴速也无法对输液滴速进行调整， 给治疗带来了不便。
再接着， 当输液瓶内的输液滴尽后， 排气装置里面的输液随着防回血滴管 lc或莫非氏 管 lb内的输液水位的下降而回流到防回血输液器 1的防回血滴管 l c或莫非氏管 lb内，此 时排气装置自动解除密封， 防回血浮塞 la则随着防回血滴管 lc内的输液的减少而下落， 并最终将防回血滴管 lc的下端密封住， 隔阻空气进入防回血滴管 lc下面的下输液管， 防 止输液无法克服静脉的压力而出现回血现象。 此外， 如果空气过滤膜 4为透气、 透水式的过滤膜， 那么在密封塞 5打开后， 当输液 液面上升到排气装置所安装的管的管高的二分之一以上， 还没有上升到达空气过滤膜 5之 前， 对于图 1、 2所示的实施例指的是还没有上升到防回血输液器 1的防回血滴管 lc或莫 非氏管 lb与排气装置的开口处的下端前， 则需要将密封塞 5塞住， 以避免输液透过空气过 滤膜 4溢出排出装置外部。
在防回血输液器 1是莫非氏管 lb与防回血滴管 lc的组合的情况下的使用方法如下： 当莫非氏管 lb连接在防回血滴管 lc的上方时， 等防回血浮塞 la将防回血滴管 lc的 底部密封后， 先将莫非氏管 lb上的排气装置的密封塞 5打开， 吸液的同时完成莫非氏管 lb的排气， 此时由于莫非氏管 lb与防回血滴管 lc之间的连接颈部比较小， 输液张力可以 收住输液不向下走， 因为下面的防回血浮塞 la已经将防回血滴管的低端密封了， 所以输液 和空气都不能通过这个颈部端口向下， 因此当防回血滴管 lc的排气装置没有打开的时候， 莫非氏管 lb内的空气和输液都不会向下进入防回血滴管 lc内；当莫非氏管 lb排气结束后， 再将防回血滴管 lc的排气装置的密封塞 5打开， 完成防回血滴管 lc的排气， 其它的操作 方法则与防回血输液器 1为防回血滴管 l c的情况是一样的。
当防回血滴管 lc连接在莫非氏管 lb的上方时， 等防回血浮塞 la将防回血滴管 lc的 底部密封后， 先将防回血滴管 lc上的排气装置的密封塞 5打开， 吸液的同时完成防回血滴 管 lc的排气， 在排气过程中， 防回血浮塞 la上浮， 接着将莫非氏管 lb的排气装置的密封 塞 5打开， 输液逐渐进入莫非氏管 lb， 使莫非氏管 lb上的排气装置开始排气， 直至排气 结束。 此时要注意一点的是， 在排气前， 要将防回血输液器 1的防回血滴管 l c或莫非氏管 lb下方的下输液管 9上的流量调节器 （图中未示） 关闭， 使液体和气体不能通过， 在排气 结束后， 才能开启流量调节器， 如此可保证不会有气体从静脉输液针进入人体。 根据本发明的一个实施方式， 所述密封塞 5通过一个连接片 5a连接所述基座 3， 所述 密封塞 5与基座 3之间设有一个密封圈 6。 当打开密封塞 5后， 密封塞 5借助连接片 5a仍 旧连接在基座 3上， 因此， 便于保管。 密封塞 5与基座 3之间的接触部位具有密封圈 6， 从而可确保密封塞 5密封无误。 其中， 所述连接片 5a可为软质连接片， 所述密封圈 6指的 是符合药典标准的输液器用的密封软胶制作的密封圈。
根据本发明的一个实施方式， 所述基座 3内设置有第一镂空体 3a和第二镂空体 3b， 所述第一、 二镂空体 3a、 3b分别位于所述空气过滤膜 4的两侧。 所述第一、 二镂空体 3a、 3b用于支撑空气过滤膜 4。 所述第一、 二镂空体 3a、 3b分别可为镂空板， 或网， 或纵格。
其中， 基座 3可呈水平设置， 即基座 3的中心线与防回血滴管 lc相互垂直， 如图 1所 示， 此时， 第一、 二镂空体 3a、 3b呈左右位置地固定在基座 3内， 所述密封塞 5在闭合状 态下接触所述第一镂空体 3a。基座 3也可呈垂直设置， 即基座 3的中心线与防回血滴管 lc 相互平行， 如图 2所示， 此时， 第一、 二镂空体 3a、 3b呈上下位置地固定在基座 3内， 所 述密封塞 5在闭合状态下接触所述第一镂空体 3a。 实施方式二
本实施方式是在实施方式一的基础上做的进一步改进， 具体如下：
如图 4和图 5所示， 当基座 3呈垂直设置时， 所述排气装置还包括第三镂空体 3c， 所 述第三镂空体 3c设置在所述基座 3内并位于所述第二镂空体 3b的下方， 所述第二、 三镂 空体 3b、 3c之间设有密封浮塞 3d， 所述第二、 三镂空体 3b、 3c之间的距离大于所述密封 浮塞 3d的高度， 以便密封浮塞 3d可随着液面而上下浮动， 所述密封浮塞 3d的上部的外侧 面与所述基座 3内部位于第二镂空体 3b到第三镂空体 3c之间部分的上部的内侧面的形状、 尺寸相匹配， 以实现吻合密封。
其中，所述密封浮塞 3d可外表面密封， 内部中空， 上部为圆台体形状， 下部为圆柱体， 还可以是圆柱体下加圆冠体， 或半圆球体。密封浮塞 3d上部的外侧面的表层使用符合药典 标准的输液器专用的密封软胶制作， 密封浮塞 3d的其他部位使用硬塑料制作。 以之相配合 的是， 所述第二镂空体 3b与第三镂空体 3c之间的部分中， 上部为圆台体形状， 下部为圆 柱体形状， 下部是圆柱形的形状可以确保获得更多的浮力， 且需要第二镂空体和第三镂空 体之间提供容纳它的体积最小。
此外， 所述密封浮塞 3d的高度应满足： 密封浮塞 3d的中心纵截面图的外接圆的直径， 大于基座 3内部位于第二镂空板 3b到第三镂空板 3c之间的圆柱体形状部分的直径之值时 的密封浮塞 3d的高度， 以保证在储运、 使用中密封浮塞 3d在基座 3内不会发生侧翻、 倒 置。
进一步而言， 所述第三镂空体 3c可从所述中空管 2延伸形成， 如图 4所示， 或者， 所 述第三镂空体 3c粘结安装在基座 3的下端处， 如图 5所示。 本实施方式中的所述空气过滤膜 4可为透气、透水式的过滤膜。所述第三镂空体 3c可 为镂空板， 或网， 或纵格。
在使用时， 在密封塞 5打开后， 输液袋内的液体输入防回血输液器 1内， 其内的空气 随着中空管 2和空气过滤膜 4往外排， 同时液体也随着中空管 2和空气过滤膜 4往外排， 液体逐渐进入基座 3内。所述密封浮塞 3d随着基座 3内的液面的升高而上浮， 直至所述密 封浮塞 3d的上部的外侧面和基座的与浮塞 3d的外侧面的形状尺寸相匹配的那部分接触吻 合后， 防回血输液器 1内的空气停止排出， 并防止输液继续向上涌而穿过空气过滤膜 4向 排气装置的外面溢的现象， 从而使输液液面维持在恒定的高度。 此时， 如果输液器晃动， 就将密封塞 5关闭， 如果不晃动， 就不必关闭密封塞 5。
当输液袋的液体滴尽后， 防回血输液器 1内的液体逐渐减少， 排气装置的基座 3里面 的液体随着防回血输液器 1内的输液水位的下降而回流到防回血输液器 1内， 密封浮塞 3d 则随之下降而打开密封端， 此时排气装置自动解除密封。
本实施方式中， 由于在排气装置内增加了密封浮塞 3d的结构， 密封浮塞 3d利用输液 的浮力而上下浮动， 从而可使排气装置的基座 3进行自动密封和自动解除密封。
本实施方式的其他结构、 工作原理和有益效果与实施方式一的相同， 在此不再赘述。 实施方式三
本实施方式是在实施方式一的基础上做的进一步改进， 具体如下：
如图 6-图 8所示， 当基座 3呈垂直设置时， 所述排气装置还包括通气管 2a， 所述通气 管 2a的一端连接所述中空管 2的外端 （指的是中空管 2远离防回血输液器 1的一端）， 所 述通气管 2a的另一端连接所述基座 3， 即所述基座 3借助所述通气管 2a而连通所述中空 管 2， 所述空气过滤膜 4的位置不低于连接在防回血输液器 1上方的输液瓶 7内的最高液 面。
本实施方式中的所述空气过滤膜 4可为透气、 透水式的过滤膜。
在使用时， 在密封塞 5打开后， 输液袋内的液体输入防回血输液器 1内， 防回血输液 器 1内的空气随着中空管 2和空气过滤膜 4往外排， 同时液体也随着中空管 2和空气过滤 膜 4往外排， 逐渐进入基座 3和通气管 2a内。 由于空气过滤膜 4的位置不低于所述输液瓶 7内的最高液面， 使得通气管 2a内的液体无法到达空气过滤膜 4的位置， 因此有效地防止 了输液外溢。
当输液袋的液体滴尽后， 防回血输液器 1内的液体逐渐减少， 排气装置的基座 3和通 气管 2a里面的液体随着防回血输液器 1内的输液水位的下降而回流到防回血输液器 1内， 此时排气装置自动解除密封。
进一步而言， 所述中空管 2与通气管 2a可以分体连接， 如图 5和图 6所示， 所述通气 管 2a的下端套设在所述中空管 2的端部上， 上端连接基座 3， 通气管 2a的长度要保证在 使用中空气过滤膜 4的高度不低于输液瓶 7中的最高输液液面。 此外， 中空管 2与通气管 2a也可以一体制成， 如图 7所示。
根据本发明的一个实施方式， 所述通气管 2a的上端一侧设有钩子 2b或者夹子， 当需 要输液时， 可通过钩子 2b或者夹子将输液瓶 7挂在旁边的物体上， 使排气装置的空气过滤 膜 4的位置不低于或高于输液瓶 7的输液液面的位置。
本实施方式的其他结构、 工作原理和有益效果与实施方式一的相同， 在此不再赘述。 实施方式四
本实施方式是在上述任一个实施方式的基础上做的进一步改进， 具体如下： 如图 9-图 16所示， 所述中空管 2为加药管 2c， 所述加药管 2c的一端连接所述防回血 输液器 1的防回血滴管 1C或莫非氏管 lb的侧壁， 另一端连接便于加药的密封软胶 2d， 所 述排气装置安装在所述加药管 2c的上端。
进一步而言， 所述加药管 2c 的中间部位向上延伸出一个连接管 2e， 所述排气装置安 装在所述连接管 2e的上端。
进一步而言， 在连接管 2e的上端安装的， 可以是仅包括基座 3， 第一、 二镂空体 2a、 2b和空气过滤膜 4的排气装置 （也就是实施方式一所示的排气装置）， 如图 12所示； 或者 可以是还包括有第三镂空体 3c和密封浮塞 3d的排气装置 （也就是实施方式 2所示的排气 装置）， 此时基座 3设置在连接管 2e的上端， 如图 11所示； 或者是包括有通气管 2a的排 气装置 （也就是实施方式 3所示的排气装置）， 此时通气管 2a的下端连通连接管 2e， 上端 连接基座 3， 如图 10所示。
在另一个实施例中， 所述加药管 2c通过一个空心针 2f与所述排气装置连接， 如图 9， 图 14-图 16所示。 具体是， 所述排气装置的下端封闭设置， 空心针 2f 的一端插入所述加 药管 2c的密封软胶 2d中， 另一端插入排气装置的下端。 加药管 2c中的药液通过空心针 2f可流入排气装置内。
本实施方式的其他结构、 工作原理和有益效果与实施方式一， 二或三的相同， 在此不 再赘述。 实施方式五
本实施方式是在上述任一个实施方式的基础上做的进一步改进， 具体如下： 如图 17-图 19所示， 所述排气装置还包括排气通道 8， 所述排气通道 8的一端连通所 述基座 3， 另一端设有开口， 所述开口的横向位置位于所述防回血输液器 1 的中心区域， 纵向位置位于所述排气装置所安装的管的管高的 1/2到 2/3之间的位置。
其中， 所述排气通道 8可与基座 3—体形成。 所述开口位于排气通道 8的下方， 所述 开口可以为喇叭口 8a， 如图 17所示， 也可为直口 8b， 如图 18、 19所示。
本实施例中由于设置了排气通道 8， 将排气装置内的气体的始排口 （此处为开口） 从 防回血输液器 1的防回血滴管 lc或莫非氏管 lb的内壁延伸到了中央区域， 如此可以防止 由于输液器 1的防回血滴管 lc或莫非氏管 lb的倾斜而导致输液器内继续向外排气， 而使 防回血输液器 1的防回血滴管 lc或莫非氏管 lb内输液水位偏高。 进一步而言， 本实施例 中， 当防回血输液器 1的防回血滴管 lc或莫非氏管 lb出现低频的轻微晃动时， 防回血输 液器 1内的液面基本接近于一条直线， 所以气体的始排口不会偏离防回血输液器 1的防回 血滴管 lc或莫非氏管 lb内液面之上很大的距离， 在使用中不须将排气装置的基座 3尾端 的密封塞 5塞上， 就可以防止内输液水位的上升。 当防回血输液器 1的防回血滴管 lc或莫 非氏管 lb出现高频的剧烈晃动或震动时，此时输液液面不是出于一条直线或接近于直线的 情况的， 此时需要将密封塞 5塞上， 以防止防回血输液器 1 的防回血滴管 1C或莫非氏管 lb内的输液液面高于气体排出的始排口很多， 而导致液面上升， 滴速观察困难。
在另一个实施例中， 所述防回血输液器 1上端的颈部安装有一个喷嘴 8c， 以将输液喷 向防回血输液器 1的防回血滴管 1C或莫非氏管 lb的内壁上。 如此可以防止在排气装置排 气时， 吸入到排气装置内的输液直接滴落在气体的始排口内， 而导致排气通道 8 内含有输 液而导致排气困难。
本实施方式的其他结构、 工作原理和有益效果与实施方式一至实施方式四中的其中一 个的相同， 在此不再赘述。 实施方式六
本实施方式是在上述任一个实施方式的基础上做的进一步改进， 具体如下： 如图 17-图 19所示， 所述防回血输液器 1的防回血滴管 lc的下端连接下输液管 9， 所 述下输液管 9上设有外圆锥接头 9a， 所述外圆锥接头 9a具有容置腔 9b， 所述外圆锥接头 9a的顶部具有上盖 9c， 所述上盖 9c上设有上盖开口 9d， 所述上盖 9c的下方设有防水空 气过滤膜 9e， 所述外圆锥接头 9a的底部呈锥形。
所述防水空气过滤膜 9e可以以超声或热合或胶合的方法精密地贴合在上盖 9c上。 在实施方式一至实施方式五中，在打开密封塞 5之前必须确保防回血浮塞 la回落到防 回血滴管 lc的底部将之密封住， 之后才能使输液瓶 7的输液滴落到防回血输液器 1内。这 是因为，如果防回血浮塞 la没有下落到防回血滴管 lc将防回血滴管 lc密封住前就开始排 气后， 空气就会通过排气装置进入防回血输液器 1 内， 使得空气混合输液水一起排向防回 血输液器 1下面的下输液管 9内， 导致下输液管 9进气， 而如果空气通过下输液管 9和静 脉注射针进入人体， 会在人体内造成血栓， 引发生命危险。
所述防水空气过滤膜 9e与所述上盖 9c之间可设有间歇腔， 以便空气能更顺畅地从上 盖开口 9d中排出。
本实施方式中， 进行输液器排气前的正常操作后， 在防回血输液器 1 向下挂时， 直接 将密封塞 5打开， 也就是说， 在打开密封塞 5之前不需要确保防回血浮塞 la回落到防回血 滴管 lc的底部将之密封住， 因为如果有空气通过排气装置进入防回血输液器 1内， 使得空 气混合输液水一起排向下输液管 9内，而所述外圆锥接头 9a则可以将进入下输液管 9内的 空气从上盖开口 9d中排出， 从而避免空气进入静脉输液针， 以确保输液的安全。 进一步而 言， 当空气进入下输液管 9内后， 会先截留在药液过滤膜 9f 的上端， 因为输液比空气重， 所以空气分布在上面， 由于上面的输液不断地涌入外圆锥接头 9a内， 最终将空气全部从上 盖开口 9d排出外圆锥接头 9a， 如此空气就不会穿过外圆锥接头 9a内的药液过滤膜 9f 而 造成对人体的威胁。
此外， 所述防回血滴管 lc有浮塞型的 （如图 1至图 16， 图 19所示） 和防回血过滤膜 型的 （如图 17、 18所示） 两种。 也就是说， 浮塞型的防回血滴管 lc内设置的是防回血浮 塞 la， 防回血过滤膜的防回血滴管 lc内设置的是防回血过滤膜 ld。
浮塞型的防回血滴管 lc内的防回血浮塞 la的下部是密封胶，一旦将防回血滴管 lc的 下端密封住后， 不管经历多少时间， 经历多么大的程度的剧烈晃动或震动， 都不会使它丧 失防回血功能。 但是， 防回血过滤膜型的防回血滴管 lc的防回血过滤膜 Id是利用输液的 张力， 也就是气泡表面的膜来防回血的， 因此其防回血功能只能维持十来分钟， 并且在隔 阻空气进入下输液管 9时不能对抗防回血输液器 1受到强烈的振动或弹击。
因此， 上述防回血过滤膜型的防回血滴管 lc如果结合本实施例的外圆锥接头 9a的结 构，当防回血过滤膜型的防回血滴管 lc当遭遇了上述使它丧失隔阻空气的外部因素的作用 后， 则可以利用防水空气过滤膜 9e及上盖开口 9d来将进入下输液管 9内的空气自动排除 掉， 从而确保使用的安全性。
本实施方式的其他结构、 工作原理和有益效果与实施方式一至实施方式五中的其中一 个的相同， 在此不再赘述。 以上所述仅为本发明的几个实施例， 本领域的技术人员依据申请文件公开的可以对本 发明实施例进行各种改动或变型而不脱离本发明的精神和范围。

Claims

权利要求书
1、 一种防回血输液器用排气装置， 所述防回血输液器 （1) 为防回血滴管 （ic)， 或者 为防回血滴管 （lc) 与莫非氏管 （lb) 的组合； 其特征在于， 所述排气装置包括基座 （3)， 空气过滤膜 （4) 和密封塞 （5)， 所述基座 （3) 的一端连接在所述防回血滴管 （lc) 和 / 或莫非氏管 （lb) 的侧壁上， 另一端连接有可开、 合的所述密封塞 （5)， 所述空气过滤膜 (4) 固定在所述基座 （3) 内。
2、 根据权利要求 1所述的排气装置， 其特征在于， 所述排气装置通过从所述防回血滴 管 （lc) 或莫非氏管 （lb) 的侧壁上延伸形成的中空管 （2) 相接。
3、 根据权利要求 1所述的排气装置， 其特征在于， 所述密封塞 （5) 通过一个连接片 (5a) 连接所述基座 （3)， 所述密封塞 （5) 与基座 （3) 之间设有一个密封圈 （6)。
4、 根据权利要求 1或 2所述的排气装置， 其特征在于， 所述基座 （3) 内设置有第一 镂空体 （3a)和第二镂空体 （3b)， 所述第一、 二镂空体 （3a、 3b) 分别位于所述空气过滤 膜 (4) 的两侧。
5、 根据权利要求 4所述的排气装置， 其特征在于， 所述空气过滤膜 （4) 为透气、 不 透水式的过滤膜。
6、 根据权利要求 4所述的排气装置， 其特征在于， 所述空气过滤膜 （4) 为透气、 透 水式的过滤膜。
7、 根据权利要求 6所述的排气装置， 其特征在于， 所述基座 （3) 呈垂直设置， 所述 第一镂空体 （3a) 和第二镂空体 （3b) 呈上下位置地固定在所述基座 （3) 内。
8、 根据权利要求 7 所述的排气装置， 其特征在于， 所述排气装置还包括第三镂空体
(3c), 所述第三镂空体 （3c) 设置在基座 （3) 内并位于所述第二镂空体 （3b) 的下方， 所述第二、 三镂空体 （3b、 3c) 之间设有密封浮塞 （3d)， 所述第二、 三镂空体 （3b、 3c) 之间的距离大于所述密封浮塞 （3d) 的高度， 所述密封浮塞 （3d) 的上部的外侧面与所述 基座（3) 内部位于第二镂空体（3b)到第三镂空体（3c)之间部分的上部的内侧面的形状、 尺寸相匹配。
9、 根据权利要求 7所述的排气装置， 其特征在于， 所述排气装置还包括通气管（2a)， 所述通气管 （2a) 的一端连接所述中空管 （2) 的外端， 所述通气管 （2a) 的另一端连接所 述基座 （3)， 所述空气过滤膜 （4) 的位置不低于连接在所述输液器上方的输液瓶 （7) 内 的最高液面。
10、 根据权利要求 8所述的排气装置， 其特征在于， 所述通气管 （2a) 的上端一侧设 有钩子 （2b) 或者夹子。
11、 根据权利要求 5-9任意一项所述的排气装置， 其特征在于， 所述中空管 （2) 为加 药管 （2c)， 所述加药管 （2c) 的一端连接所述防回血输液器 （1) 的防回血滴管 （lc) 或 莫非氏管 （lb) 的侧壁， 另一端连接便于加药的密封软胶（2d)， 所述排气装置安装在所述 加药管 （2c) 的上端。
12、 根据权利要求 11所述的排气装置， 其特征在于， 所述加药管 （2c) 的中间部位向 上延伸出一个连接管 （2e)， 所述排气装置安装在所述连接管 （2e) 的上端； 或者， 所述加 药管 （2c) 通过一个空心针 （2f) 与所述排气装置连接。
13、 根据权利要求 2、 3、 5、 6、 7、 8、 9、 10或 12所述的排气装置， 其特征在于， 所 述排气装置还包括向所述防回血滴管 （lc) 或莫非氏管 （lb) 内延伸的排气通道 （8)， 所 述排气通道（8) 的一端连通所述基座 （3)， 另一端设有开口， 所述开口的位置设置在所述 防回血输液器 （1) 的防回血滴管 （lc) 或莫非氏管 （lb) 的管的管高的 1/2到 2/3之间， 且位于防回血滴管 （lc) 或莫非氏管 （lb) 的该位置的横截面的中心区域。
14、 根据权利要求 13所述的排气装置， 其特征在于， 所述开口位于所述排气通道（8) 的下方， 所述开口为喇叭口 （8a) 或直口 （8b)。
15、 根据权利要求 13所述的排气装置， 其特征在于， 所述防回血输液器 （1) 上端的 颈部安装有一个喷嘴 （8c)， 以将输液喷向防回血输液器 （1) 的内壁上。
16、 根据权利要求 13-15任意一项所述的排气装置， 其特征在于， 所述防回血输液器 (1) 的防回血滴管 （lc) 或莫非氏管 （lb) 的下端连接的下输液管 （9) 上的外圆锥接头 (9a) 具有容置腔 （9b)， 所述外圆锥接头 （9a) 的顶部具有上盖 （9c)， 所述上盖 （9c) 上设有上盖开口 （9d)， 所述上盖 （9c) 的下方设有防水空气过滤膜 （9e)， 所述外圆锥接 头 （9a) 的底部呈锥形。
17、 根据权利要求 16所述的排气装置， 其特征在于， 所述防水空气过滤膜 （9e) 与所 述上盖 （9c) 之间设有间歇腔。
18、 根据权利要求 5所述的排气装置， 其特征在于， 所述第一、 二、 三镂空体 （3a、
3b、 3c) 分别为镂空板， 或网， 或纵格。
19、 根据权利要求 1所述的排气装置， 其特征在于， 所述的排气装置上的空气过滤膜 (4) 以超声、 热合或胶合的方法紧密的贴合在所述的基座 （3) 内。
PCT/CN2011/080169 2010-09-30 2011-09-26 防回血输液器用排气装置 WO2012041200A1 (zh)

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