CN112315654A - Anti-misoperation internal-pumping external-injection type tympanic membrane puncture and intratympanic injection medical device - Google Patents

Anti-misoperation internal-pumping external-injection type tympanic membrane puncture and intratympanic injection medical device Download PDF

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CN112315654A
CN112315654A CN202011113843.4A CN202011113843A CN112315654A CN 112315654 A CN112315654 A CN 112315654A CN 202011113843 A CN202011113843 A CN 202011113843A CN 112315654 A CN112315654 A CN 112315654A
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pipe
tube
piston
hole
wall
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张琦
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
    • A61F11/20—Ear surgery
    • A61F11/202—Surgical middle-ear ventilation or drainage, e.g. permanent; Implants therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
    • A61F11/20—Ear surgery
    • A61M1/0023—
    • 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
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/64—Containers with integrated suction means
    • A61M1/67—Containers incorporating a piston-type member to create suction, e.g. syringes
    • 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
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/84—Drainage tubes; Aspiration tips
    • 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
    • A61M31/00—Devices for introducing or retaining media, e.g. remedies, in cavities of the body
    • 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
    • A61M2210/00—Anatomical parts of the body
    • A61M2210/06—Head
    • A61M2210/0662—Ears
    • A61M2210/0668—Middle ear
    • 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
    • A61M2210/00—Anatomical parts of the body
    • A61M2210/06—Head
    • A61M2210/0662—Ears
    • A61M2210/0675—Eustachian tube

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Public Health (AREA)
  • Vascular Medicine (AREA)
  • Hematology (AREA)
  • Anesthesiology (AREA)
  • Surgery (AREA)
  • Psychology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Otolaryngology (AREA)
  • Biophysics (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The invention discloses an anti-misoperation medical device for internal-pumping external-injection tympanocentesis and intratympanic injection, which comprises a first piston, a second piston and a channel converter, wherein the first piston is connected with the second piston through a pipeline; the channel converter comprises a connector and a conversion pipe; the sealing plate is provided with an inner tube positioned in the tube cavity of the base tube; the inner pipe is provided with four longitudinal guide sliding chutes extending along the central line direction of the inner pipe; the pipe wall of the inner pipe is provided with an elastic piece and a positioning through hole, and the first piston comprises a first sealing plug and a first pull handle provided with an inward convex annular baffle table; the second piston comprises a second sealing plug and a second pull handle, and a positioning convex plate matched with the longitudinal guide sliding groove is arranged on the outer wall of the second pull handle; each location flange is equipped with the unblock breach, still is equipped with on each location flange and holds breach and elasticity trip, and each elasticity trip takes place elastic deformation under the exogenic action and stretches into to holding in the breach. The invention effectively prevents misoperation.

Description

Anti-misoperation internal-pumping external-injection type tympanic membrane puncture and intratympanic injection medical device
Technical Field
The invention belongs to the technical field of ear-nose-throat medical equipment, and particularly relates to an anti-misoperation internal-suction external-injection type tympanic membrane puncture and intratympanic injection medical device.
Background
Secretory otitis media is an inflammatory disease of the middle ear characterized primarily by tympanites effusion and hearing loss. The main cause of the disease is the obstruction of the eustachian tube, and the secretions in the tympanic cavity can not be drained to the pharynx to form the effusion of the tympanic cavity. The effusion in the tympanic cavity is a mixture of leakage liquid, effusion and secretion. Removal of tympanometric fluid is critical to the treatment of secretory otitis media. Aspiration of tympanocentesis is the most common treatment for otitis media, and is simple and easy to implement. When secretory otitis media is treated, a second needle insertion and medicine injection is needed after conventional puncture liquid extraction, two holes are formed sometimes, and medicine flows back to the outer side of the tympanic membrane from the other needle hole during medicine injection; in addition, the secondary puncture also aggravates the puncture pain of the patient.
CN105496644A discloses a tympanocentesis, intratympanic injection medical device, comprising: the first puncture device comprises a puncture needle and the first connector, the second puncture device comprises an injection needle and the second connector, and the suction device comprises a negative pressure mechanism and a third connector; after the puncture needle and the injection needle are inserted into the tympanic cavity of the patient, when effusion in the tympanic cavity needs to be sucked, the third connector of the suction device can be in threaded connection with the second connector of the second puncture device; when the liquid medicine needs to be injected into the tympanic cavity, the third connector of the suction device can be screwed out of the second connector, and the fourth connector of the injection device can be screwed into the second connector.
The medical device has the following advantages: because the second pjncture needle cover is established inside first pjncture needle, when first pjncture needle puncture patient's tympanic membrane, first pjncture needle can drive its inside second pjncture needle also puncture patient's tympanic membrane, first pjncture needle and second pjncture needle both only are formed with a puncture hole on patient's tympanic membrane, when needs aspirate the hydrops in the tympanic cavity or need to inject the liquid medicine to the tympanic cavity in, only need select corresponding connector (third connector or fourth connector) to be connected with the second connector can, need not form two holes on the tympanic membrane by the secondary puncture and cause the palirrhea outside to the tympanic membrane of liquid medicine, also can not increase the misery of puncture for the patient for the secondary puncture.
However, the medical device also has the following disadvantages: when the two functional states of sucking the accumulated liquid and injecting the medicine are switched, the other puncture device can be installed only after one puncture device is detached, so that the operation is complicated; in addition, because the needle head of the injection needle and the puncture needle also passes through the tympanic membrane to be positioned in the tympanic cavity during the switching operation, the complicated function switching operation easily causes the needle head to be mistakenly pricked to other parts in the ear due to the shaking of hands.
The applicant previously applied a tympanocentesis and intratympanic injection medical device, which can realize the conversion of two functional states of sucking hydrops and injecting medicine without disassembly and assembly, but has the following defects: because the treatment process of the disease is basically that suction is carried out first and then injection is carried out, although prompt information can be set on the syringe, the misoperation prevention mechanism is not arranged, so that the misoperation of a user in the operation process can still be caused, namely the misoperation of suction after injection occurs.
The applicant also applies a medical device for preventing the operation error of tympanocentesis and intratympanic injection, which can ensure that a user must firstly suck effusion in the treatment process to inject medicine, thereby effectively preventing the operation error. However, the following disadvantages also exist: due to the structural design limitation, the injection medical device is an external-suction and internal-injection type use mode, liquid accumulation is sucked by using an annular first piston of the injection medical device, and medicine is injected by using a second piston which is positioned at the center of the annular first piston; in order to provide different use modes and personal experience, the application particularly provides an anti-misoperation internal-suction external-injection type tympanic membrane puncture and intratympanic injection medical device.
Disclosure of Invention
The invention aims to provide an anti-misoperation medical device for tympanocentesis and intratympanic injection with internal suction and external injection.
The technical scheme for realizing the purpose of the invention is as follows:
the scheme is further preferable that: an anti-misoperation medical device for tympanocentesis and intratympanic injection with internal suction and external injection comprises a first piston, a second piston and a channel converter; the channel converter comprises a connector and a conversion pipe; the conversion pipe comprises a base pipe and a seal plate fixedly arranged at one end of the base pipe; one side end of the sealing plate is provided with an inner tube positioned in the tube cavity of the base tube; the inner pipe is provided with four longitudinal guide sliding chutes extending along the central line direction of the inner pipe; the pipe wall of the inner pipe is provided with an elastic part, the elastic part comprises a boss protruding towards the outside of the inner pipe, each longitudinal guide sliding groove is also provided with a positioning through hole penetrating through the pipe wall of the inner pipe, and each longitudinal guide sliding groove and the corresponding elastic part are positioned on the same straight line; the first piston comprises an annular first sealing plug and an annular first pull handle, an inward convex annular baffle table is arranged in a tube cavity of the first pull handle, and the annular baffle table is sleeved on the outer wall of the inner tube; the second piston comprises a second sealing plug and a second pull handle, positioning convex plates are arranged on the outer wall of the second pull handle, and each positioning convex plate is positioned in a corresponding longitudinal guide sliding groove in the tube cavity of the inner tube; each positioning convex plate is provided with an unlocking notch at the position adjacent to the second sealing plug, and each elastic piece can elastically deform under the action of external force and extend into the corresponding unlocking notch; each positioning convex plate is also provided with an accommodating notch and an elastic clamping hook, each elastic clamping hook comprises an elastic arm connected with the corresponding positioning convex plate and a hook tooth positioned at the tail end of the elastic arm, and each hook tooth protrudes towards the outer side of the second pull handle; each elastic clamping hook generates elastic deformation under the action of external force and extends into the accommodating notch.
The scheme is further preferable that: the needle head comprises a first needle head and a second needle head; the second needle head is arranged in the cavity of the first needle head, the cavity of the second needle head forms a second channel, and a space between the outer wall of the second needle head and the inner wall of the first needle head forms a first channel; the connector comprises a base plate, a first convex pipe and a second convex pipe which are arranged at one side end of the base plate, and a first sliding pipe and a second sliding pipe which are arranged at the other side end of the base plate; the second convex tube is positioned in the tube cavity of the first convex tube, the first convex tube is connected with the first needle head, and the second convex tube is connected with the second needle head; the substrate is provided with four first through holes communicated with the first channels and four second through holes communicated with the second channels; the second sliding tube is positioned in the tube cavity of the first sliding tube; the outer wall of the inner pipe and the inner wall of the base pipe are clamped to form a first working cavity, and the pipe cavity of the inner pipe forms a second working cavity; the first plugging portion is provided with a first conversion hole communicated with the first working cavity, and the second plugging portion is provided with a second conversion hole communicated with the second working cavity.
The scheme is further preferable that: the other side end of the sealing plate is provided with a first plugging part matched with the first sliding pipe and a second plugging part matched with the second sliding pipe, and the elastic part is positioned on the inner pipe body between the positioning through hole and the sealing plate.
The scheme is further preferable that: the longitudinal guide sliding groove is arranged on the inner wall of one end, far away from the sealing plate, of the inner tube.
The scheme is further preferable that: the inner tube and the base tube are concentrically arranged.
The scheme is further preferable that: the outer wall of the first pull handle is provided with a longitudinal support plate protruding along the radial direction of the base pipe, and the inner wall of the first pull handle is provided with a longitudinal crimping plate protruding along the radial direction of the base pipe; the outer ends of the longitudinal supporting plates are in press connection with the inner wall of the base pipe, and the longitudinal press connection plates are in press connection with the outer wall of the inner pipe.
The scheme is further preferable that: a gap is arranged between the annular blocking platform and the first sealing plug, and the length of the gap along the central line direction of the base pipe is greater than that of the protruding platform of the elastic part along the central line direction of the base pipe.
The scheme is further preferable that: each elastic clamping hook is arranged at the opening of the corresponding accommodating notch.
The scheme is further preferable that: the base pipe drives the sealing plate and the first conversion hole and the second conversion hole of the sealing plate to rotate, and when the first conversion hole rotates to be communicated with the first through hole, the second plugging part plugs the second through hole; when the second conversion hole rotates to be communicated with the second through hole, the first blocking part blocks the first through hole.
The invention has the positive effects that: (1) the second piston can only act after the first piston is pulled to the preset position, namely, in the use process, the accumulated liquid can only be sucked first and then the medicine is injected, so that misoperation is effectively prevented. (2) The conversion of two functional states of sucking hydrops and injecting medicine can be completed only by twisting the base tube to a preset angle.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic half-section view of the injectable medical device of FIG. 1;
FIG. 3 is an exploded view of the injectable medical device of FIG. 1;
FIG. 4 is an exploded view of the injectable medical device of FIG. 3 from another angle;
FIG. 5 is a schematic half-sectional view of the connector of the injectable medical device of FIG. 1;
FIG. 6 is a schematic half-section view of a transition tube of the injectable medical device of FIG. 1;
FIG. 7 is a schematic half-section view of a primary piston of the injectable medical device of FIG. 1;
fig. 8 is a schematic half-section view of a secondary piston of the injectable medical device of fig. 1.
The reference signs are: a first needle 1, a first channel 11, a second needle 2, a second channel 21, a first piston 3, a first sealing plug 31, a first pull handle 32, a longitudinal support plate 321, a longitudinal pressing plate 322, an annular stop 323, a gap 324, a second piston 4, a second sealing plug 41, a second pull handle 42, a positioning convex plate 43, an unlocking notch 44, a containing notch 45, an elastic clamping hook 46, an elastic arm 461, a hook tooth 462,
the connecting head 5, the base plate 51, the first through hole 511, the second through hole 512, the first convex tube 52, the second convex tube 53, the first sliding tube 54, the guide groove 541, the guide notch 542, the second sliding tube 55, the transition tube 6, the base tube 61, the sealing plate 62, the first blocking portion 63, the first transition hole 631, the second blocking portion 64, the second transition hole 641, the inner tube 65, the longitudinal guide sliding groove 651, the elastic member 652, the boss 653, the positioning through hole 654, the first working cavity 66, the second working cavity 67, the annular groove 68, and the guide boss 69.
Detailed Description
(example 1)
The embodiment is a medical device for preventing misoperation, such as internal suction and external injection tympanocentesis and intratympanic injection, and is shown in fig. 1 to 8, and comprises a first needle 1, a second needle 2, a first piston 3, a second piston 4 and a channel converter.
As shown in fig. 1 to 4, the second needle is arranged in the cavity of the first needle, the cavity of the second needle forming the second passage 21, and the space between the outer wall of the second needle and the inner wall of the first needle forming the first passage 11.
The channel switch comprises a connection head 5 and a switch tube 6.
The connector comprises a base plate 51, a first convex pipe 52 and a second convex pipe 53 which are arranged at one side end of the base plate, and a first sliding pipe 54 and a second sliding pipe 55 which are arranged at the other side end of the base plate; the second convex tube is positioned in the tube cavity of the first convex tube, the first convex tube is connected with the first needle head, and the second convex tube is connected with the second needle head; the substrate is provided with four first through holes 511 communicated with the first channel and four second through holes 512 communicated with the second channel; the second slide is located in the lumen of the first slide. The four first through holes and the four second through holes are evenly distributed along the circumferential direction of the first sliding pipe.
The conversion pipe comprises a base pipe 61 and a closing plate 62 fixedly arranged at one end of the base pipe; one side end of the sealing plate is provided with a first plugging part 63 matched with the first sliding pipe and a second plugging part 64 matched with the second sliding pipe, and the other side end of the sealing plate is provided with an inner pipe 65 positioned in the cavity of the base pipe; the outer wall of the inner pipe and the inner wall of the base pipe are clamped to form a first working cavity 66, and the pipe cavity of the inner pipe forms a second working cavity 67; the first blocking part is provided with four first conversion holes 631 communicated with the first working cavity, and the second blocking part is provided with four second conversion holes 641 communicated with the second working cavity. The four first conversion holes are uniformly distributed on the first plugging part in an annular shape, and the four second conversion holes are uniformly distributed on the second plugging part in an annular shape. The inner tube and the base tube are concentrically arranged.
The inner tube is provided with four longitudinal guide sliding grooves 651 extending along the central line direction of the inner tube on the inner wall of the open end of the inner tube, namely the inner wall of one end of the inner tube away from the sealing plate; the tube wall of the inner tube is provided with four elastic pieces 652, each elastic piece comprises a boss 653 protruding towards the outside of the inner tube, each longitudinal guide sliding groove is also provided with a positioning through hole 654 penetrating through the tube wall of the inner tube, and the four positioning through holes are uniformly distributed on the tube wall of the inner tube in a ring shape. Each longitudinal guide sliding groove and the corresponding elastic piece are positioned on the same straight line. The elastic piece is positioned on the inner tube body between the positioning through hole and the sealing plate. In this embodiment, each of the elastic members is formed by die cutting the wall of the inner tube. The base tube and the closing plate are integrally formed by injection molding.
The base pipe drives the sealing plate and the first conversion hole and the second conversion hole of the sealing plate to rotate, and when the first conversion hole rotates to be communicated with the first through hole, the second plugging part plugs the second through hole; when the second conversion hole rotates to be communicated with the second through hole, the first blocking part blocks the first through hole.
The first through hole is arranged in a clamping space of the first convex pipe and the second convex pipe on the base plate, and the second through hole is arranged in a space enclosed by the first convex pipe on the base plate.
The first blocking part and the second blocking part are clamped to form an annular groove 68 matched with the second sliding pipe, and the second sliding pipe of the connecting head is inserted into the annular groove.
The first plugging portion and the second plugging portion are provided with sealing surfaces which abut against the base plate of the connector, and the sealing surfaces are in sliding sealing fit with the base plate.
An arc-shaped guide groove 541 is formed in the inner wall of the first sliding pipe of the connector and is arranged along the circumferential direction of the first sliding pipe; the outer peripheral wall of the base pipe is provided with a guide boss 69 located in the guide groove. The advantages of this structure are: the guide boss rotates in the guide groove in a reciprocating manner along with the reciprocating rotation of the base pipe, and the first through hole is communicated with the first conversion hole and the second through hole is blocked when the guide boss rotates to the bottom in one direction by presetting the positions of the first through hole, the second through hole, the first conversion hole and the second conversion hole; when the guide boss rotates to the bottom in the other direction, the second through hole is communicated with the second conversion hole, and the first through hole is blocked from the first conversion hole; the structure is convenient to switch between two working states of sucking accumulated liquid and injecting medicine.
The inner wall of the first sliding pipe is also provided with a guide notch 542 arranged along the central line direction of the first sliding pipe, and a guide boss on the connector is in interference fit with the guide notch. The advantages of this structure are: the base pipe and the connector can be assembled and matched in an inserting mode, the operation is simple and convenient, and the base pipe can be prevented from falling off from the connector in the rotating process.
The first working chamber is annular in radial cross-section and the second working chamber is circular in radial cross-section.
The first piston 3 comprises an annular first sealing plug 31 and an annular first pull handle 32, the first sealing plug and the first pull handle can slide along the first working chamber in a reciprocating mode, and the inner pipe penetrates through the first pull handle; four longitudinal supporting plates 321 protruding along the radial direction of the base pipe are arranged on the outer wall of the first pull handle, and four longitudinal crimping plates 322 protruding along the radial direction of the base pipe are arranged on the inner wall of the first pull handle; the outer ends of the longitudinal supporting plates are in press connection with the inner wall of the base pipe, and the longitudinal press connection plates are in press connection with the outer wall of the inner pipe. An inward convex annular baffle 323 is arranged in the tube cavity of the first pull handle, and the annular baffle is sleeved on the outer wall of the inner tube. A gap 324 is provided between the annular abutment and the first sealing plug, which gap has a greater length in the direction of the centre line of the substrate tube than the length of the projection of the resilient member in the direction of the centre of the substrate tube. When the boss of the elastic member is located in the gap, the first piston can reciprocate within a certain distance for discharging air that enters the first working chamber when sucking the liquid medicine to be injected.
The first pull handle, the longitudinal support plate, the longitudinal compression joint plate and the annular baffle table are integrally formed by injection molding.
The second piston comprises a second sealing plug 41 and a second pull handle 42, which are reciprocally slidable along the second working chamber. The second sealing plug is matched with the second working cavity, and the shape of the radial section of the second sealing plug is circular. Four positioning convex plates 43 are arranged on the outer wall of the second pull handle, and each positioning convex plate is positioned in a corresponding longitudinal guide sliding groove in the inner pipe cavity; each positioning convex plate is provided with an unlocking notch 44 at the position adjacent to the second sealing plug, and the length of the unlocking notch along the central line direction of the inner pipe is greater than that of the elastic piece along the central line direction of the inner pipe, so that each elastic piece can extend into a corresponding unlocking notch under the action of external force. Each positioning convex plate is also provided with an accommodating notch 45 and an elastic clamping hook 46, each elastic clamping hook comprises an elastic arm 461 connected with the corresponding positioning convex plate and a hook tooth 462 positioned at the tail end of the elastic arm, and each hook tooth protrudes towards the outer side of the second pull handle; each elastic clamping hook is arranged at the opening of the corresponding accommodating notch.
The working principle of preventing misoperation of this embodiment is as follows:
(1) sucking the liquid medicine to be injected: the second piston is pulled outwards, so that the elastic clamping hook 46 of the second piston is embedded into the positioning through hole 654 of the inner pipe, the unlocking notch 44 of the second piston is right opposite to the elastic piece 651, and then the first piston can freely reciprocate in the first working cavity because the annular baffle 323 of the first piston can press and deform the elastic piece to extend into the unlocking notch; in the process, when the second piston moves in place, the resistance of the elastic clamping hook needs to be overcome when the second piston moves again, and a larger acting force is needed, so that a user can clearly perceive the resistance; in addition, by presetting the size between the elastic clamping hook and the inner pipe wall, a sound such as 'click' can be heard as a prompt sound when each hook tooth extends into a corresponding through hole.
(2) After the first piston is used for sucking the medicine to be injected, the first piston can be moved to the position shown in fig. 2 by presetting the volume of the first working cavity and the volume of the medicine liquid to be sucked; the second piston is also inserted to the bottom in the position shown in figure 2; at the moment, the unlocking notch is moved away, and the elastic piece can not retract, so that the annular boss of the first piston can not slide through the elastic piece any more, namely the first piston can not perform injection action at the moment and can only perform effusion suction action by using the second piston;
(3) after the second piston sucks the effusion, the second piston is pulled to the elastic clamping hook to be embedded into the positioning through hole of the inner tube again, and then the first piston can freely move to inject the liquid medicine.
The embodiment forces the first piston and the second piston to act successively, so that the beneficial technical effect of preventing misoperation is obtained.

Claims (3)

1. An anti-misoperation medical device for tympanocentesis and intratympanic injection with internal suction and external injection comprises a first piston, a second piston and a channel converter; the method is characterized in that:
the channel converter comprises a connector and a conversion pipe;
the conversion pipe comprises a base pipe and a seal plate fixedly arranged at one end of the base pipe;
one side end of the sealing plate is provided with an inner tube positioned in the tube cavity of the base tube;
the inner pipe is provided with four longitudinal guide sliding chutes extending along the central line direction of the inner pipe; the pipe wall of the inner pipe is provided with an elastic part, the elastic part comprises a boss protruding towards the outside of the inner pipe, each longitudinal guide sliding groove is also provided with a positioning through hole penetrating through the pipe wall of the inner pipe, and each longitudinal guide sliding groove and the corresponding elastic part are positioned on the same straight line;
the first piston comprises an annular first sealing plug and an annular first pull handle, an inward convex annular baffle table is arranged in a tube cavity of the first pull handle, and the annular baffle table is sleeved on the outer wall of the inner tube;
the second piston comprises a second sealing plug and a second pull handle, positioning convex plates are arranged on the outer wall of the second pull handle, and each positioning convex plate is positioned in a corresponding longitudinal guide sliding groove in the tube cavity of the inner tube; each positioning convex plate is provided with an unlocking notch at the position adjacent to the second sealing plug, and each elastic piece can elastically deform under the action of external force and extend into the corresponding unlocking notch; each positioning convex plate is also provided with an accommodating notch and an elastic clamping hook, each elastic clamping hook comprises an elastic arm connected with the corresponding positioning convex plate and a hook tooth positioned at the tail end of the elastic arm, and each hook tooth protrudes towards the outer side of the second pull handle; each elastic clamping hook generates elastic deformation under the action of external force and extends into the accommodating notch;
the other side end of the sealing plate is provided with a first plugging part matched with the first sliding pipe and a second plugging part matched with the second sliding pipe, and the elastic part is positioned on the inner pipe body between the positioning through hole and the sealing plate; the longitudinal guide sliding groove is arranged on the inner wall of one end of the inner tube far away from the sealing plate;
the base pipe drives the sealing plate and the first conversion hole and the second conversion hole of the sealing plate to rotate, and when the first conversion hole rotates to be communicated with the first through hole, the second plugging part plugs the second through hole; when the second conversion hole rotates to be communicated with the second through hole, the first blocking part blocks the first through hole.
2. The anti-maloperation tympanocentesis, intratympanic injection medical device of claim 1, wherein: the inner tube and the base tube are concentrically arranged.
3. The anti-maloperation tympanocentesis, intratympanic injection medical device of claim 1, wherein: the needle head comprises a first needle head and a second needle head; the second needle head is arranged in the cavity of the first needle head, the cavity of the second needle head forms a second channel, and a space between the outer wall of the second needle head and the inner wall of the first needle head forms a first channel;
the connector comprises a base plate, a first convex pipe and a second convex pipe which are arranged at one side end of the base plate, and a first sliding pipe and a second sliding pipe which are arranged at the other side end of the base plate; the second convex tube is positioned in the tube cavity of the first convex tube, the first convex tube is connected with the first needle head, and the second convex tube is connected with the second needle head; the substrate is provided with four first through holes communicated with the first channels and four second through holes communicated with the second channels; the second sliding tube is positioned in the tube cavity of the first sliding tube;
the outer wall of the inner pipe and the inner wall of the base pipe are clamped to form a first working cavity, and the pipe cavity of the inner pipe forms a second working cavity; the first plugging portion is provided with a first conversion hole communicated with the first working cavity, and the second plugging portion is provided with a second conversion hole communicated with the second working cavity.
CN202011113843.4A 2018-11-06 2018-11-06 Anti-misoperation internal-pumping external-injection type tympanic membrane puncture and intratympanic injection medical device Withdrawn CN112315654A (en)

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CN202011113843.4A Withdrawn CN112315654A (en) 2018-11-06 2018-11-06 Anti-misoperation internal-pumping external-injection type tympanic membrane puncture and intratympanic injection medical device
CN202011113846.8A Withdrawn CN112315655A (en) 2018-11-06 2018-11-06 Anti-misoperation internal-pumping external-injection type tympanic membrane puncture and intratympanic injection medical device

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* Cited by examiner, † Cited by third party
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NO884377L (en) * 1988-10-03 1990-04-04 Ken Heimreid Dosing / BLANDESPROEYTE.
CH696423A5 (en) * 2003-12-18 2007-06-15 Tecpharma Licensing Ag Automatic injection unit comprises a release element which is joined to the trigger element so that it moves longitudinally together with the trigger element, and is laterally movable relative to it
EP2279021B1 (en) * 2008-04-18 2013-02-13 Kuros Biosurgery AG Dispensing device, kit containing the device, and method of operating the device
AT506690B1 (en) * 2008-06-16 2009-11-15 Pharma Consult Ges M B H & Co INJECTION DEVICE
WO2011084504A1 (en) * 2010-01-05 2011-07-14 Allergan, Inc. Syringe comprising two plungers with locking means
DK2533834T3 (en) * 2010-02-09 2018-01-15 Shl Group Ab DRUG DELIVERY DEVICES
EP2583705A1 (en) * 2011-10-21 2013-04-24 Sanofi-Aventis Deutschland GmbH Indicator arrangement for an auto-injector
CN203598347U (en) * 2013-11-25 2014-05-21 王海鹏 Cavity medicine feeder
WO2016102446A1 (en) * 2014-12-24 2016-06-30 Ferrosan Medical Devices A/S Syringe for retaining and mixing first and second substances
CN108524100A (en) * 2018-05-03 2018-09-14 张琦 Auripuncture, Injection in Tympanic Cavity medical treatment device

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CN109481144A (en) 2019-03-19
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