CN114452514A

CN114452514A - Anti-falling catheter with lock bag

Info

Publication number: CN114452514A
Application number: CN202210149040.7A
Authority: CN
Inventors: 葛召营; 赵莉
Original assignee: Suiping People's Hospital
Current assignee: Suiping People's Hospital
Priority date: 2022-02-18
Filing date: 2022-02-18
Publication date: 2022-05-10
Anticipated expiration: 2042-02-18
Also published as: CN114452514B

Abstract

An anti-drop catheter with a locked bag relates to a catheter, wherein one end of the catheter (9) is provided with an insertion head (23) with a urine outflow hole, the outer edge of the catheter close to the insertion head is provided with a raised ring, the catheter between the raised ring and the insertion head is provided with a through hole (20), the middle part of the inner surface of a rubber ring (19) sleeved between the raised ring and the insertion head is provided with a conical outward pushing column, and the outer edge of the catheter close to one end is provided with a sleeve (16); two ends of the rubber bag tube (17) are respectively and fixedly connected to the outer edge surfaces of the insertion head and the sleeve; one end of the inner tube (13) is provided with a guide head (3), one end of the guide head, which is close to the inner tube, is provided with an annular recess, and the annular recess of the guide head is provided with a fluid hole connected with the inner tube; the invention utilizes the inner tube to control the rubber bag tube to be filled with liquid, the rubber bag tube prevents a patient from pulling out the catheter privately, and the inner tube also controls the liquid in the rubber bag tube to be released when the catheter is taken out.

Description

Anti-falling catheter with lock bag

Technical Field

The invention relates to a catheter, in particular to an anti-falling catheter with a lock bag.

Background

The urinary catheter is a flexible pipeline made of natural rubber, silicon rubber or polyvinyl chloride (PVC), and mainly aims at draining urine of patients who cannot urinate autonomously, such as prostatic hyperplasia, major surgery, paralysis, urinary retention or urinary incontinence; some patients have the phenomenon of catheter detachment without attention, the catheter with the air bag sold in the market can better prevent the catheter from detachment, the catheter utilizes two parallel pipes, one pipe is used for urination, the other pipe is used for inflating the air bag arranged close to the insertion end of the catheter, the air bag is clamped at the urine discharge port of the bladder to prevent the catheter from detachment, and the air inflation port is arranged at the outer end part, so that the patients can pull out the catheter by opening the plug cover of the air inflation pipe to discharge air in the air bag, and the phenomenon of catheter detachment of the patients is hardly caused; furthermore, the urinary catheter has a certain discomfort after insertion, and some patients can pull out the urinary catheter without attention from doctors or carers, which causes the urinary tract injury.

Disclosure of Invention

In order to overcome the defects in the background art, the invention discloses an anti-falling catheter with a lock bag.

The technical scheme for realizing the invention is as follows:

an anti-dropping catheter with a lock bag comprises a catheter, an insertion head, a rubber ring, a conical outward-pushing column, a rubber bag tube, an inner tube, a guide head and an injector, wherein the insertion head with a urine outflow hole is arranged at one end of the catheter, a bulge ring is arranged at the outer edge of the catheter close to the insertion head, a through hole is formed in the catheter between the bulge ring and the insertion head, the rubber ring is sleeved on the catheter between the bulge ring and the insertion head, the conical outward-pushing column corresponding to the through hole of the catheter is arranged in the middle of the inner surface of the rubber ring, and a sleeve is arranged at the outer edge of the catheter close to one end; two ends of the rubber bag tube are respectively and fixedly connected to the insertion head and the outer edge surface of the sleeve, and an expansion cavity is formed between the rubber bag tube and the outer edge of the rubber ring; a guide head is arranged at one end of the inner pipe, an annular recess is arranged at one end of the guide head, which is close to the inner pipe, a fluid hole connected with the inner pipe is arranged on the annular recess of the guide head, and a lubricant is coated on the guide head and the inner pipe; the liquid in the rubber capsule tube is released by the syringe by feeding the liquid into the rubber capsule tube or through the inner tube.

The anti-drop catheter with the locking bag is characterized in that the end part of the insertion head is of a hemispherical structure, a urine flat hole is formed in the end part close to the insertion head, a connecting hole is formed in the end face of the connecting end of the insertion head, a chamfer is arranged at the outer edge from the connecting hole to the connecting end of the insertion head, the connecting hole is sleeved at one end of the catheter, a vertical hole connected with the urine flat hole is formed in the hole bottom of the connecting hole, and a urine outflow hole is formed by the urine flat hole and the vertical hole; the outer edge of the catheter close to the insertion head is provided with a raised ring which is a limiting ring, and the outer edges of two ends of the limiting ring are respectively provided with a chamfer; chamfers are respectively arranged on the outer edges of the two ends of the sleeve.

The middle parts of two sides of the anti-falling catheter with the lock bag are respectively provided with a fixing hole, and the outer side of each fixing hole is provided with a diameter expanding port; the outer edge of the outer end of the conical outer pushing column is provided with an annular plane matched with the aperture of the through hole, the outer end face of the conical outer pushing column is provided with a connecting blind hole, the fixing plate is located in the diameter expanding opening of the rubber ring, and the inserting rod in the middle of the inner face of the fixing plate penetrates through the fixing hole and then is fixedly connected with the connecting blind hole.

Take lock bag anticreep catheter, the leader outer end is equipped with the conical surface, the leader inner is equipped with the inverted cone face, the inner and the connecting pipe one end fixed connection of inverted cone face, be equipped with the horizontal hole that link up both sides near on inverted cone face department at the connecting pipe, the horizontal hole middle part link up with the connecting pipe pore, the middle part of connecting pipe is pegged graft to the other end in inner tube one end.

The anti-dropping catheter with the lock bag is provided with protruding strips from the middle part of the connecting pipe to the outer edges of two sides of one end of the connecting pipe respectively.

The anti-drop catheter with the lock bag is characterized in that a urine bag connector connected with a urine bag is arranged at the other end of the catheter; the middle part in the urine bag connector is equipped with the urine bag connection trepanning of ureter trepanning and undergauge respectively to both ends terminal surface, ureter trepanning and the other end fixed connection of catheter.

The anti-dropping catheter with the locking bag is characterized in that the lubricant is a water-soluble human lubricant.

The anti-dropping catheter with the lock bag is characterized in that the other end of the inner tube is provided with an injection connector connected with an injector, a pore is formed in the middle of the inside of the injection connector, an inner tube trepanning and an insertion tube trepanning are respectively arranged at two ends of the pore and end faces of two ends of the injection connector, and the inner tube trepanning is fixedly connected with the other end of the inner tube.

The anti-dropping catheter with the lock bag comprises an injection tube, a barrel cover, a piston rod and a piston handle, wherein an insertion tube matched with an insertion tube trepanning of an injection connector is arranged at one end of the injection tube, the other end of the injection tube is provided with the barrel cover, finger rods are respectively arranged on two sides of the barrel cover, the piston is positioned in a cavity of the injection tube, the middle of one end of the piston is fixedly connected with one end of the piston rod, the middle of the piston rod is positioned in a hole in the middle of the barrel cover, and the piston handle is arranged at the other end of the piston rod.

The anti-dropping catheter with the lock bag is provided with a measuring ruler on the outer surface of the injection tube.

Through the disclosure, the beneficial effects of the invention are as follows:

according to the anti-dropping catheter with the locked bag, the insertion head and the limiting ring are arranged at one end of the catheter, the through hole is formed in the catheter between the insertion head and the limiting ring, the through hole is blocked by the conical outward pushing column sleeved on the inner face of the rubber ring between the insertion head and the limiting ring, so that liquid injected into the rubber bag tube forms the expanded bag, the expanded bag is blocked at the urine discharge port of the bladder to prevent the catheter from dropping out, and the expanded bag of the rubber bag tube forms locking on the urine discharge port of the bladder; the inner tube with the guide head and the injector are stored by medical staff, so that the patient can not control the liquid in the rubber bag tube to be discharged outside without the inner tube, and the phenomenon that the patient pulls out the catheter can be effectively prevented; the urine bag has the advantages that the innovation is expanded, a small amount of red or blue edible pigments are added into liquid, when the rubber ring is not tightly blocked, the outflow of the colored liquid can be displayed in the urine bag, the accompanying and nursing can be conveniently found in time to remind a doctor to replace and treat the liquid in time, the edible pigments are less harmful to the body, even if a small amount of the liquid flows out, the liquid enters the urine bag through the catheter, the liquid reversely flows into the bladder, little or no phenomenon that the liquid reversely flows into the bladder after being laid for a long time can occur, and the phenomenon can be found in time; the invention has ingenious design and can effectively prevent the catheter from falling off or being pulled out.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the rubber bladder tube of the present invention in a liquid-filled state;

FIG. 3 is a schematic view of the insert head structure of the present invention;

FIG. 4 is a schematic view of a stop collar of the present invention;

FIG. 5 is a schematic view of the construction of the bushing of the present invention;

FIG. 6 is a schematic perspective view of the sleeve, stop ring and insertion head of the catheter of the present invention;

FIG. 7 is a schematic perspective view of a rubber ring according to the present invention;

FIG. 8 is a schematic perspective view of the connection structure of the fixing plate and the tapered outer push-out post according to the present invention;

FIG. 9 is a schematic view of the connection structure of the rubber ring and the tapered outer push column of the present invention;

FIG. 10 is a schematic view of the guide head of the present invention;

FIG. 11 is a perspective view of the guide head of the present invention;

FIG. 12 is a schematic view of the structure of the urine bag connector of the present invention;

FIG. 13 is a schematic view of the injection connector of the present invention;

FIG. 14 is a schematic view of the syringe configuration of the present invention;

reference numerals: 1. a piston handle; 2. a piston rod; 3. a guide head; 4. a horizontal hole; 5. a connecting pipe; 6. a cylinder cover; 7. a finger; 8. an injection tube; 9. a urinary catheter; 10. a piston; 11. a cavity; 12. inserting a tube; 13. an inner tube; 14. an injection connector; 15. a urine bag connector; 16. a sleeve; 17. a rubber capsule tube; 18. a limiting ring; 19. a rubber ring; 20. perforating; 21. a fixing plate; 22. a tapered push-out post; 23. an insertion head; 24. an expansion chamber; 25. a fluid direction; 26. flattening urine holes; 27. erecting a hole; 28. connecting holes; 29. a fixing hole; 30. expanding the diameter opening; 31. an annular flat surface; 32. connecting the blind holes; 33. inserting a rod; 34. a conical surface; 35. a reverse conical surface; 36. a tube hole; 37. a raised strip; 38. a urinary catheter trepan; 39. the urine bag is connected with the trepanning; 40. an inner pipe sleeve hole; 41. fine pores; 42. sleeving a cannula; 43. a measuring ruler.

Detailed Description

The present invention will be further illustrated with reference to the following examples; the following examples are not intended to limit the present invention, and are only used as a support for the implementation of the present invention, and any equivalent structure replacement within the technical framework of the present invention is included in the protection scope of the present invention;

with reference to the figures 1 to 14, the anti-drop urinary catheter with the lock bag comprises a urinary catheter 9, an insertion head 23, a rubber ring 19, a conical outward pushing column 22, a rubber bag tube 17, an inner tube 13, a guide head 3 and an injector, wherein one end of the urinary catheter 9 is provided with the insertion head 23 with a urine outflow hole, and the other end of the urinary catheter 9 is provided with a urine bag connector 15 connected with a urine bag; a urinary catheter trepanning 38 and a reduced urinary bag connecting trepanning 39 are respectively arranged from the middle part to the end faces of two ends in the urinary bag connector 15, the urinary catheter trepanning 38 is fixedly connected with the other end of the urinary catheter 9, a protruding ring is arranged on the outer edge of the urinary catheter 9 close to the insertion head 23, a through hole 20 is arranged on the urinary catheter 9 between the protruding ring and the insertion head 23, a rubber ring 19 is sleeved on the urinary catheter 9 between the protruding ring and the insertion head 23, a conical outward pushing column 22 corresponding to the through hole 20 of the urinary catheter 9 is arranged in the middle of the inner face of the rubber ring 19, and a sleeve 16 is arranged on the outer edge of one end, close to the urinary catheter 9; two ends of the rubber bag tube 17 are respectively fixedly connected to the insertion head 23 and the outer edge surface of the sleeve 16, and an expansion cavity 24 is formed between the rubber bag tube 17 and the outer edge of the rubber ring 19; one end of the inner tube 13 is provided with a guide head 3, the other end of the inner tube 13 is provided with an injection connector 14 connected with an injector, the middle part in the injection connector 14 is provided with a fine hole 41, an inner tube sleeve hole 40 and an intubation tube sleeve hole 42 are respectively arranged from the two ends of the fine hole 41 to the end surfaces of the two ends of the injection connector 14, and the inner tube sleeve hole 40 is fixedly connected with the other end of the inner tube 13; an annular recess is arranged at one end of the guide head 3 close to the inner tube 13, a fluid hole connected with the inner tube 13 is arranged on the annular recess of the guide head 3, and a water-soluble human lubricant is coated on the guide head 3 and the inner tube 13; the liquid in the rubber tube 17 is released by the syringe by feeding the liquid into the rubber tube 17 or through the inner tube 13.

With reference to fig. 1, 2, 3, 4, 5 or 6, the end of the insertion head 23 is a hemispherical structure, a urine flat hole 26 is formed at the end close to the end of the insertion head 23, a connection hole 28 is formed at the end face of the connection end of the insertion head 23, a chamfer is formed at the outer edge of the connection hole 28 to the connection end of the insertion head 23, the connection hole 28 is sleeved at one end of the catheter 9, a vertical hole 27 connected with the urine flat hole 26 is formed at the hole bottom of the connection hole 28, and a urine outflow hole is formed by the urine flat hole 26 and the vertical hole 27; the outer edge of the catheter 9 close to the insertion head 23 is provided with a raised ring which is a limiting ring 18, and the outer edges of two ends of the limiting ring 18 are respectively provided with a chamfer; the outer edges of the two ends of the sleeve 16 are respectively provided with a chamfer.

With reference to fig. 1, 2, 7 or 8, the middle parts of both sides of the rubber ring 19 are respectively provided with a fixing hole 29, and the outer side of the fixing hole 29 is provided with a diameter expanding port 30; the outer edge of the outer end of the conical outer pushing column 22 is provided with an annular plane 31 matched with the aperture of the through hole 20, a gap is preferably reserved between the outer edge of the conical outer pushing column 22 and the through hole 20 when the conical outer pushing column 22 is inserted into the through hole 20, the outer end face of the conical outer pushing column 22 is provided with a connecting blind hole 32, the fixing plate 21 is positioned in the expanding opening 30 of the rubber ring 19, and an inserting rod 33 in the middle of the inner surface of the fixing plate 21 penetrates through the fixing hole 29 and then is fixedly connected with the connecting blind hole 32; or a cylinder is arranged on the outer end face of the conical pushing column 22, and the cylinder on the outer end face of the conical pushing column 22 is melted by a hot melting mode and then filled in the expanding opening 30 of the rubber ring 19.

Combine figure 1, 2, 10 or 11, 3 outer ends of guide are equipped with

conical surface

34, 3 inner ends of guide are equipped with inverted cone face 35, the inner and the 5 one end fixed connection of connecting pipe of inverted cone face 35, be equipped with the horizontal hole 4 that link up both sides near inverted cone face 35 department at connecting

pipe

5, 4 middle parts of horizontal hole link up with 5 tube holes 36 of connecting pipe, the middle part to the other end of connecting pipe 5 are pegged graft in inner tube 13 one end, the both sides outer fringe at the middle part to one end of connecting pipe 5 is equipped with protruding strip 37 respectively, the depth of insertion of connecting pipe 5 in inner tube 13 one end when controlling the installation by two protruding strips 37.

With reference to fig. 1 or 14, the syringe comprises a syringe barrel 8, a barrel cover 6, a piston 10, a piston rod 2 and a piston handle 1, the external surface of the injection tube 8 is provided with a measuring ruler 43, the doctor can conveniently control the using amount of the liquid by the measuring ruler 43, one end of the injection tube 8 is provided with an insertion tube 12 matched with the insertion tube trepanning 42 of the injection connector 14, the other end of the injection tube 8 is provided with a tube cover 6, the connection of the tube cover 6 and the injection tube 8 uses the conventional threaded connection, the two sides of the cylinder cover 6 are respectively provided with a finger 7, a piston 10 is positioned in a cavity 11 of the injection cylinder 8, the middle of the outer edge surface of the piston 10 is provided with an annular groove, a rubber ring is placed in the annular groove to obtain the interference fit between the piston 10 and the 11 walls of the cavity of the injection cylinder 8, the middle of one end of the piston 10 is fixedly connected with one end of the piston rod 2, the middle of the piston rod 2 is positioned in a hole in the middle of the cylinder cover 6, and the other end of the piston rod 2 is provided with a piston handle 1.

The anti-dropping catheter with the lock bag is implemented by combining the attached drawings 1 to 14, wherein the catheter 9, the insertion head 23 and the limiting ring 18 are of an integrated structure made of the same material, and the material is medical grade plastic; the sleeve 16, the urine bag connector 15, the guide head 3, the inner tube 13 and the injection connector 14 are of an integrated structure made of the same material, and the material is medical grade plastic; the rubber capsule tube 17 is latex; the conical outward pushing column 22 and the fixing plate 21 are made of medical grade plastics; the syringe may use a syringe cannula 12 that mates with the cannula trepan 42 of the injection connector 14, i.e., a commercially available human syringe; the urine bag is a urine bag with a urine bag connecting sleeve hole 39 matched with the urine bag connecting head 15.

During installation, operating in an aseptic factory, firstly coating a proper amount of lubricant on the outer parts of the guide head 3 and the inner tube 13, inserting the guide head 3 and the inner tube 13 into the catheter 9 to a proper depth, then coating a proper amount of lubricant on the outer parts of the catheter 9, including the insertion head 23, the rubber bag tube 17 and the catheter, placing the package bag into a package bag and sealing the package bag; the syringe is sterilized and packaged; the liquid is bottled in a quantitative mode.

When in use, the rubber sac tube 17 is inserted into the bladder of a patient through the urethra of the patient, the liquid is sucked into the cavity 11 of the syringe injection tube 8, the liquid comprises physiological saline added with pigment, sterile water for injection or medical water which is not rejected by human bodies, the cannula 12 of the syringe is connected with the cannula trepanning 42 of the injection connector 14 at the other end of the inner tube 13, the guide head 3 and the inner tube 13 are pushed towards the inner part of the catheter 9, the urine outflow hole of the insertion head 23 is sealed by the conical surface 34 at the end part of the guide head 3, the conical outward pushing column 22 pushed open by the guide head 3 and pushed against one end of the inner tube 13 at the moment is used for sucking the air among the catheter 9, the rubber sac tube 17 and the inner tube 13 by the upward end of the syringe, then the cannula 12 end of the syringe is downwards pressed on the piston handle 1, and the liquid is injected into the bladder of the inner tube 13 through the inner tube 13 by the syringe at the other end of the inner tube 13, The gap between the perforation 20 of the urinary catheter 9 and the conical outer pushing column 22 and the gap between the rubber ring 19 and the urinary catheter 9 are pushed into an expansion cavity 24' of the rubber bag tube 17, which is indicated by a fluid direction 25 shown in figure 2, the catheter 9 is prevented from falling off from the urinary bladder discharge port by the expanded rubber bag tube 17, and the liquid in the rubber bag tube 17 acquires the expansion bag of the expansion cavity 24 to form locking to the urinary bladder discharge port;

when the liquid in the expansion cavity 24 is taken out, the guide head 3 is smeared with the lubricant again, the guide head 3 and the inner tube 13 are inserted into the catheter 9, the urine outflow hole of the insertion head 23 is closed by the end part of the guide head 3, at the moment, the conical outer pushing column 22 which is pushed open by the guide head 3 and is pushed by one end of the inner tube 13 is pushed, the liquid in the expansion cavity 24 flows out through the other end of the inner tube 13 after passing through the gap between the rubber ring 19 and the catheter 9 and the gap between the perforation 20 of the catheter 9 and the conical outer pushing column 22 by the elasticity of the rubber capsule tube 17 in the expansion cavity 24, and the application can be pulled out.

The present invention is not described in detail in the prior art.

Claims

1. The utility model provides a take lock bag anticreep catheter, includes catheter (9), insert head (23), rubber circle (19), toper push column (22), rubber bag pipe (17), inner tube (13), guide head (3) and syringe, characterized by: an insertion head (23) with a urine outflow hole is arranged at one end of the catheter (9), a raised ring is arranged at the outer edge of the catheter (9) close to the insertion head (23), a through hole (20) is formed in the catheter (9) between the raised ring and the insertion head (23), a rubber ring (19) is sleeved on the catheter (9) between the raised ring and the insertion head (23), a conical outer pushing column (22) corresponding to the through hole (20) of the catheter (9) is arranged in the middle of the inner surface of the rubber ring (19), and a sleeve (16) is arranged at the outer edge of the catheter (9) close to one end; two ends of the rubber bag tube (17) are respectively and fixedly connected to the outer edge surfaces of the insertion head (23) and the sleeve (16), and an expansion cavity (24) is formed between the rubber bag tube (17) and the outer edge of the rubber ring (19); one end of the inner pipe (13) is provided with a guide head (3), one end of the guide head (3) close to the inner pipe (13) is provided with an annular recess, the annular recess of the guide head (3) is provided with a fluid hole connected with the inner pipe (13), and a lubricant is coated on the guide head (3) and the inner pipe (13); the liquid in the rubber tube (17) is released by the syringe by feeding the liquid into the rubber tube (17) or through the inner tube (13).

2. The anti-drop catheter with lock capsule of claim 1, which is characterized in that: the end part of the insertion head (23) is of a hemispherical structure, a urine flat hole (26) is formed in the end part, close to the end part, of the insertion head (23), a connecting hole (28) is formed in the end face of the connecting end of the insertion head (23), a chamfer is formed in the outer edge of the connecting end, from the connecting hole (28) to the connecting end of the insertion head (23), the connecting hole (28) is sleeved at one end of the catheter (9), a vertical hole (27) connected with the urine flat hole (26) is formed in the hole bottom of the connecting hole (28), and a urine outflow hole is formed by the urine flat hole (26) and the vertical hole (27); the outer edge of the catheter (9) close to the insertion head (23) is provided with a raised ring which is a limiting ring (18), and the outer edges of two ends of the limiting ring (18) are respectively provided with a chamfer; chamfers are respectively arranged on the outer edges of the two ends of the sleeve (16).

3. The anti-dropping catheter with lock capsule of claim 1, which is characterized in that: the middle parts of two sides of the rubber ring (19) are respectively provided with a fixing hole (29), and the outer side of the fixing hole (29) is provided with a diameter expanding opening (30); the outer edge of the outer end of the conical outer pushing column (22) is provided with an annular plane (31) matched with the aperture of the through hole (20), the outer end face of the conical outer pushing column (22) is provided with a connecting blind hole (32), the fixing plate (21) is positioned in the diameter expanding opening (30) of the rubber ring (19), and the inserted rod (33) in the middle of the inner face of the fixing plate (21) penetrates through the fixing hole (29) and then is fixedly connected with the connecting blind hole (32).

4. The anti-dropping catheter with lock capsule of claim 1, which is characterized in that: the outer end of the guide head (3) is provided with a conical surface (34), the inner end of the guide head (3) is provided with an inverted conical surface (35), the inner end of the inverted conical surface (35) is fixedly connected with one end of the connecting pipe (5), a horizontal hole (4) which runs through two sides is formed in the position of the connecting pipe (5) close to the inverted conical surface (35), the middle of the horizontal hole (4) is run through with a pipe hole (36) of the connecting pipe (5), and the middle of the connecting pipe (5) is inserted into one end of the inner pipe (13) to the other end.

5. The anti-drop catheter with lock capsule of claim 1, which is characterized in that: the outer edges of two sides from the middle part to one end of the connecting pipe (5) are respectively provided with a convex strip (37).

6. The anti-drop catheter with lock capsule of claim 1, which is characterized in that: a urine bag connector (15) connected with a urine bag is arranged at the other end of the catheter (9); the middle part in urine bag connector (15) is equipped with urine pipe trepanning (38) and urine bag connection trepanning (39) of undergauge respectively to both ends terminal surface, urine pipe trepanning (38) and catheter (9) other end fixed connection.

7. The anti-drop catheter with lock capsule of claim 1, which is characterized in that: the lubricant is a water-soluble human lubricant.

8. The anti-drop catheter with lock capsule of claim 1, which is characterized in that: the other end of the inner tube (13) is provided with an injection connector (14) connected with an injector, a fine hole (41) is arranged in the middle of the inside of the injection connector (14), an inner tube trepanning (40) and an intubation trepanning (42) are respectively arranged from the two ends of the fine hole (41) to the end faces of the two ends of the injection connector (14), and the inner tube trepanning (40) is fixedly connected with the other end of the inner tube (13).

9. The anti-drop catheter with lock capsule of claim 8, which is characterized in that: the injector comprises an injection tube (8), a barrel cover (6), a piston (10), a piston rod (2) and a piston handle (1), wherein an insertion tube (12) matched with an injection connector (14) insertion tube trepanning (42) is arranged at one end of the injection tube (8), the barrel cover (6) is arranged at the other end of the injection tube (8), finger rods (7) are respectively arranged on two sides of the barrel cover (6), the piston (10) is positioned in a cavity (11) of the injection tube (8), the middle of one end of the piston (10) is fixedly connected with one end of the piston rod (2), the middle of the piston rod (2) is positioned in a middle hole of the barrel cover (6), and the piston handle (1) is arranged at the other end of the piston rod (2).

10. The anti-drop catheter with lock capsule of claim 9, which is characterized in that: a measuring ruler (43) is arranged on the outer surface of the injection cylinder (8).