CN112155850A

CN112155850A - Anti-misoperation tympanic membrane puncture and intratympanic injection medical device

Info

Publication number: CN112155850A
Application number: CN202010969444.1A
Authority: CN
Inventors: 张琦
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-08-13
Filing date: 2018-08-13
Publication date: 2021-01-01
Also published as: CN112155849A; CN109172139B; CN109172139A

Abstract

The invention discloses a medical device for preventing misoperation of tympanocentesis and intratympanic injection, which comprises a first needle head, a second needle head, a first piston, a second piston and a channel converter, wherein the first needle head is connected with the second needle head through a first connecting rod; the channel converter comprises a connector and a conversion pipe; the base pipe is provided with four longitudinal guide sliding chutes extending along the central line direction of the base pipe; the inner tube is provided with four elastic pieces, and each elastic piece is provided with a lug boss protruding towards the tube cavity of the inner tube; the first piston comprises a first pull handle provided with four longitudinal guide limiting plates, and the inner wall of the first pull handle is provided with four longitudinal guide positioning plates protruding along the radial direction of the base tube; each longitudinal guide positioning plate is provided with an unlocking notch at the position adjacent to the first sealing plug, and each elastic piece can enter into one corresponding unlocking notch; the second piston comprises a second pull handle, and a protruding annular baffle table matched with the inner tube cavity is arranged on the outer wall of the second pull handle. The invention can limit the sequence of the actions of the first piston and the second piston in use, thereby effectively preventing misoperation.

Description

Anti-misoperation 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 a medical device for tympanic membrane puncture and intratympanic injection, which is capable of preventing misoperation.

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.

Disclosure of Invention

The invention aims to provide a tympanic membrane puncturing and intratympanic injection medical device which effectively solves the technical problems and effectively prevents misoperation.

The technical scheme for realizing the purpose of the invention is as follows: a medical device for preventing the operation of the tympanic membrane puncture and the intratympanic injection comprises a first needle head, a second needle head, a first piston and a second piston; the first needle comprises a first connecting pipe and a first contact pin;

the structure is characterized in that: also includes a channel converter; the channel converter comprises a connector and a conversion pipe;

the conversion pipe comprises a base pipe and a seal plate arranged at one end of the base pipe; one 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 other side end of the sealing plate is provided with an inner pipe 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, and the pipe cavity of the inner pipe forms a second working cavity; the first plugging part is provided with a first conversion hole communicated with the first working cavity, and the second plugging part is provided with a second conversion hole communicated with the second working cavity;

the base tube is provided with four longitudinal guide sliding chutes extending along the central line direction of the base tube on the inner wall of one end of the base tube away from the connector; the tube wall of the inner tube is provided with four elastic pieces, and each elastic piece is provided with a boss protruding towards the tube cavity of the inner tube;

the first piston comprises a first sealing plug and a first pull handle, and the first sealing plug and the first pull handle can slide in a reciprocating mode along the first working cavity;

four longitudinal guide limiting plates protruding along the radial direction of the base tube are arranged on the outer wall of the first pull handle, and four longitudinal guide positioning plates protruding along the radial direction of the base tube are arranged on the inner wall of the first pull handle; each longitudinal guide limiting plate is positioned in a corresponding longitudinal guide sliding chute, and the inner end of each longitudinal guide limiting plate is in pressure joint with the outer wall of the inner pipe; each longitudinal guide positioning plate is provided with an unlocking notch at the position adjacent to the first sealing plug, and the length of the unlocking notch along the central line direction of the base pipe is greater than that of the elastic piece along the central line direction of the base pipe, so that each elastic piece can enter one corresponding unlocking notch under the action of external force;

the second piston comprises a second sealing plug and a second pull handle, and the second sealing plug and the second pull handle can slide along the second working cavity in a reciprocating mode; the outer wall of the second pull handle is provided with a protruding annular baffle table matched with the inner tube cavity.

The scheme is further preferable that: the second needle head comprises a second connecting pipe and a second contact pin; 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 first channel is formed between the outer wall of the second needle head and the inner wall of the first needle head; 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 pipe is positioned in the pipe cavity of the first convex pipe, the first convex pipe is in sealing connection with the first connecting pipe, and the second convex pipe is in sealing connection with the second connecting pipe; the substrate is provided with a first through hole communicated with the first channel and a second through hole communicated with the second channel; the second slide is located in the lumen of the first slide.

The scheme is further preferable that: when the sealing plate rotates along with the base pipe and the first conversion hole is 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 scheme is further preferable that: a gap is arranged between the annular blocking table and the second sealing plug, and the length of the gap along the central line direction of the base pipe is greater than that of the protruding table of the elastic part along the central line direction of the base pipe.

The scheme is further preferable that: each longitudinal guide positioning plate is arranged right opposite to a corresponding elastic piece.

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: the first needle 1, the first connecting tube 11, the first inserting needle 12, the first passage 13, the second needle 2, the second connecting tube 21, the second inserting needle 22, the second passage 23, the first piston 3, the first sealing plug 31, the first pull handle 32, the longitudinal guide limit plate 321, the longitudinal guide limit plate 322, the unlocking notch 323, the accommodating notch 33, the elastic hook 34, the elastic arm 341, the hook tooth 342, the second piston 4, the second sealing plug 41, the second pull handle 42, the annular stop 421, the gap 422, the connector 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 converting tube 6, the base tube 61, the longitudinal guide sliding groove 611, the sealing plate 62, the first blocking part 63, the first converting hole 631, the second blocking part 64, the second converting hole 641, the inner tube 65, the elastic piece 651, boss 652, through-hole 653, first working chamber 66, second working chamber 67, annular recess 68, guide boss 69.

Detailed Description

(example 1)

The embodiment is a medical device for tympanocentesis and intratympanic injection for preventing misoperation, which 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 first needle comprises a first connecting tube 11 and a first pin 12; the second needle comprises a second connecting tube 21 and a second inserting pin 22; the second needle is arranged in the cavity of the first needle, the cavity of the second needle forms a second channel 23, and a first channel 13 is formed between the outer wall of the second needle and the inner wall of the first needle.

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 pipe is positioned in the pipe cavity of the first convex pipe, the first convex pipe is in sealing connection with the first connecting pipe, and the second convex pipe is in sealing connection with the second connecting pipe; 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 base pipe is equipped with four longitudinal guide sliding grooves 611 extending along the central line direction of the base pipe on the inner wall of one end of the opening of the base pipe, namely, the inner wall of one end of the base pipe far away from the closing plate. Four elastic members 651 are provided on the wall of the inner tube, each including a boss 652 projecting towards the lumen of the inner tube. In this embodiment, each of the elastic members is formed by die cutting the wall of the inner tube.

In this embodiment, base tube and shrouding make through moulding plastics integrated into one piece.

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 a first sealing plug 31 and a first pull handle 32, and the first sealing plug and the first pull handle can slide back and forth along the first working chamber; four longitudinal guide limiting plates 321 protruding along the radial direction of the base tube are arranged on the outer wall of the first pull handle, and four longitudinal guide positioning plates 322 protruding along the radial direction of the base tube are arranged on the inner wall of the first pull handle; each longitudinal guide limiting plate is positioned in a corresponding longitudinal guide sliding chute, and the inner end of each longitudinal guide limiting plate is in pressure joint with the outer wall of the inner pipe; each longitudinal guide positioning plate is provided with an unlocking notch 323 at the position adjacent to the first sealing plug, and the length of the unlocking notch along the central line direction of the base pipe is greater than that of the elastic part along the central line direction of the base pipe, so that each elastic part can enter into a corresponding unlocking notch under the action of external force. The first pull handle, the longitudinal guide limiting plate and the longitudinal guide positioning plate are integrally formed by injection molding. The first sealing plug is matched with the first working cavity, and the radial section of the first sealing plug is annular; the radial section of the first pull handle is annular, and the inner pipe passes through the first pull handle. Each longitudinal guide positioning plate is arranged right opposite to a corresponding elastic piece.

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. The outer wall of the second pull handle is provided with a protruding annular baffle table 421 matched with the inner pipe cavity, a gap 422 is arranged between the annular baffle table and the second sealing plug, and the length of the gap along the central line direction of the base pipe is greater than that of the protruding table of the elastic part along the central direction of the base pipe. When the boss of the elastic member is located in the gap, the second piston can reciprocate within a certain distance for discharging air that enters the second working chamber when sucking the liquid medicine to be injected.

The working principle of the embodiment is as follows: as shown in fig. 2, at this time, the first switching hole is communicated with the first through hole, and the second switching hole is blocked from the second through hole, so that effusion pumping operation can be performed; after the base pipe is twisted to a preset angle, the first switching hole and the first through hole are blocked, the second switching hole and the second through hole are communicated, and medicine injection operation can be carried out. So this embodiment need not the dismouting and can accomplish two kinds of operations of suction hydrops and injection liquid medicine.

In addition, as shown in fig. 2, at this time, because the elastic member is pressed by the longitudinal guiding positioning plate of the first piston, the elastic member has no return space, and the protruding table thereof blocks the passage of the annular blocking table, so that the second piston cannot perform an injection action, that is, no matter whether the base tube is twisted to a correct position, the second piston cannot perform an injection action, and only when the first piston completes a suction action and the first piston moves to a position where the unlocking notch 323 faces the elastic member 611, under the pushing force of the annular blocking table 421 on the second piston, the protruding table of each elastic member enters into a corresponding unlocking notch 323, and the second piston can reciprocate in the inner tube, thereby completing the operation of injecting the liquid medicine. The present embodiment can effectively prevent the malfunction.

In order to allow the user to determine whether the first piston is moving to the position opposite to the elastic member 611, the present embodiment further includes four through holes 653 formed on the inner tube wall of the transition tube, and the elastic member is located between the through holes and the sealing plate; each longitudinal guiding positioning plate of the first piston is also provided with an accommodating notch 33 and an elastic clamping hook 34, each elastic clamping hook comprises an elastic arm 341 connected with a corresponding longitudinal guiding positioning plate and a hook tooth 342 positioned at the tail end of the elastic arm, and each hook tooth protrudes towards the inner tube cavity of the switching tube; each elastic clamping hook is arranged at the opening of the corresponding accommodating notch; when the first piston moves in the first working cavity in a reciprocating mode, if the hook teeth of the elastic hooks are pressed on the outer wall of the inner pipe, the unlocking notches of the first piston are not aligned with the elastic pieces on the inner pipe, and each elastic hook is compressed by the inner pipe and rebounded to a corresponding accommodating notch, so that the first piston can smoothly slide in the first working cavity; when the hook teeth move to the through holes opposite to the inner tube wall, each hook tooth extends into a corresponding through hole, the unlocking notch of the first piston is opposite to the elastic piece, the boss of each elastic piece enters into a corresponding unlocking notch, and when the first piston moves again, the resistance of the elastic clamping hook needs to be overcome, and a larger acting force is needed, so that a user can clearly perceive the elastic clamping hook; 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.

Claims

1. An anti-misoperation tympanic membrane puncture and intratympanic injection medical device comprises a channel converter, a first piston and a second piston; the channel converter comprises a connector and a conversion pipe; the method is characterized in that:

the second piston comprises a second sealing plug and a second pull handle, and the second sealing plug and the second pull handle can slide along the second working cavity in a reciprocating mode; the outer wall of the second pull handle is provided with a protruding annular baffle table matched with the inner pipe 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.

2. 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 first needle comprises a first connecting pipe and a first contact pin; the second needle head comprises a second connecting pipe and a second contact pin; 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 first channel is formed between the outer wall of the second needle head and the inner wall of the first needle head; 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 pipe is positioned in the pipe cavity of the first convex pipe, the first convex pipe is in sealing connection with the first connecting pipe, and the second convex pipe is in sealing connection with the second connecting pipe; the substrate is provided with a first through hole communicated with the first channel and a second through hole communicated with the second channel; the second slide is located in the lumen of the first slide.

3. The anti-maloperation tympanocentesis, intratympanic injection medical device of claim 2, wherein: when the sealing plate rotates along with the base pipe and the first conversion hole is 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.