CN109125891B - Expansion guide - Google Patents
Expansion guide Download PDFInfo
- Publication number
- CN109125891B CN109125891B CN201810869410.8A CN201810869410A CN109125891B CN 109125891 B CN109125891 B CN 109125891B CN 201810869410 A CN201810869410 A CN 201810869410A CN 109125891 B CN109125891 B CN 109125891B
- Authority
- CN
- China
- Prior art keywords
- guide
- expansion
- seat
- sleeve
- strip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 230000000670 limiting effect Effects 0.000 claims description 25
- 230000010339 dilation Effects 0.000 claims description 12
- 229920001971 elastomer Polymers 0.000 claims description 4
- 210000003708 urethra Anatomy 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000000806 elastomer Substances 0.000 claims 3
- 230000008602 contraction Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000002627 tracheal intubation Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 4
- 210000001519 tissue Anatomy 0.000 description 4
- 210000002784 stomach Anatomy 0.000 description 3
- 208000031481 Pathologic Constriction Diseases 0.000 description 2
- 206010065584 Urethral stenosis Diseases 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 201000001988 urethral stricture Diseases 0.000 description 2
- 206010004446 Benign prostatic hyperplasia Diseases 0.000 description 1
- 206010049576 Bladder neck sclerosis Diseases 0.000 description 1
- 208000004403 Prostatic Hyperplasia Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 210000002318 cardia Anatomy 0.000 description 1
- 230000000249 desinfective effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 235000021056 liquid food Nutrition 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000004877 mucosa Anatomy 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 208000000143 urethritis Diseases 0.000 description 1
- 210000001635 urinary tract Anatomy 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/1002—Balloon catheters characterised by balloon shape
-
- 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
- A61M25/00—Catheters; Hollow probes
- A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
- A61M25/0074—Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
-
- 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
- A61M29/00—Dilators with or without means for introducing media, e.g. remedies
- A61M29/02—Dilators made of swellable material
-
- 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
- A61M29/00—Dilators with or without means for introducing media, e.g. remedies
- A61M29/02—Dilators made of swellable material
- A61M2029/025—Dilators made of swellable material characterised by the guiding element
-
- 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
- A61M2210/10—Trunk
- A61M2210/1078—Urinary tract
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Public Health (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Biophysics (AREA)
- Pulmonology (AREA)
- Child & Adolescent Psychology (AREA)
- Vascular Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The invention provides an expansion guide which comprises a guide body, an expansion body, a guide seat and a sliding sleeve, wherein the guide body sequentially comprises a guide part, an expansion body part and a guide core rod, the sliding sleeve is sleeved on the guide core rod in a sliding mode, the guide core rod is connected with the guide seat, the expansion body is arranged on the expansion body part, the expansion body comprises at least 3 groups of expansion frameworks, each expansion framework comprises a first expansion strip and a second expansion strip, one end of each first expansion strip is hinged to the guide part, one end of each second expansion strip is hinged to the middle of each first expansion strip, and the other end of each second expansion strip is hinged to the end of the sliding sleeve. The catheter has the beneficial effects that due to the adoption of the technical scheme, a new mode is provided for the catheterization of the catheter, the catheterization resistance is small, and the pain of a patient is small.
Description
Technical Field
The invention belongs to the technical field of medical appliances, and particularly relates to an expansion guide.
Background
The cannula plays an important role clinically as a common medical means clinically. The intubation tube is used for exchanging liquid substances in a certain cavity of a human body with the outside through a catheter, for example, the catheter is used for guiding out urine in a bladder, the stomach tube is used for injecting liquid food into the stomach, and the catheter is used for discharging pus and dirty blood in the cavity from the outside.
The catheter is mainly made of silica gel, rubber, EVA, PVC and the like, and the head end and the catheter body are soft. In the intubation process, when the channel is narrow, the intubation resistance is overlarge, and the intubation is difficult. Taking a catheter as an example, partial patients have larger resistance in the urethra due to the conditions of urethral stricture, prostatic hyperplasia, canceration, bladder neck sclerosis and the like, so that the difficulty of tube placement is greatly increased. The existing clinical urethral catheterization is usually carried out by fixing the external urethral orifice with one hand after disinfecting the external urethral orifice and surrounding tissues, directly holding the catheter with the other hand or with forceps and the like, inserting the catheter from the external urethral orifice, and when the catheter faces the bending resistance and the narrow condition, the catheter needs to be more forcefully placed in the patient, so that huge pain is brought to the patient, the damage to the urethral mucosa is caused, the damage to the urinary tract structure is caused, and the risk of urethral infection is increased. When passing through the cardia in the stomach tube intubation process, the problem of difficult intubation also exists.
The following problems exist in the existing clinical intubation process: when the top end of the catheter head advances to the urethral stricture, external force is required to be increased for pushing, the head top end and human tissues at the stricture can be sheared, even though the inner membrane of the human tissues passes through the stricture, the inner membrane of the human tissues is severely contused and conditions are created for microorganism infection, and measures such as smearing lubricating oil on the outer surface of the catheter have little effect.
The invention of application number 2009200275009 discloses a guide wire catheter which comprises a guide wire and a catheter, wherein the guide wire is arranged in the catheter, the guide wire is firstly inserted into the catheter, so that the catheter has certain rigidity, and when the catheter is inserted into a bladder, the guide wire is extracted from the catheter.
However, even in the presence of a guidewire, the problems encountered with the above-described cannulae are only alleviated to a limited extent and do not fundamentally reduce the resistance of the guidewire.
Disclosure of Invention
The invention aims to provide an expanding guide device, and particularly solves the problem of high resistance at the top of a catheter in the intubation process.
The technical scheme of the invention is as follows:
the utility model provides an expansion director, includes guide main part, expansion body, guide seat and slip cap, the guide main part includes guide part, expansion body and guide core bar in proper order, and slip cap links to each other in the guide core bar, guide core bar and guide seat, the expansion body sets up in expansion body part, the expansion body includes not less than 3 group's expansion skeletons, the expansion skeleton includes first expansion strip and second expansion strip, and the one end and the guide part of first expansion strip are articulated, and the one end and the middle part of first expansion strip of second expansion strip are articulated, and the other end and the slip cap's of second expansion strip are articulated, the length of guide core bar is not less than the length of pipe.
When the catheter is used, the expansion guide is required to be matched with the catheter, the expansion guide is inserted into the catheter, the guide part and the expansion body part of the expansion guide extend out of the through hole at the front end of the catheter body, the umbrella-shaped expansion body is arranged at the front part of the guide main body, the expansion body is started through the sliding sleeve sleeved outside the guide core rod, an operator slides the sliding sleeve forwards relative to the guide core rod during use, the sliding sleeve extrudes the expansion body positioned at the expansion body part along the axial direction, the second expansion strip of the expansion body is driven by the sliding sleeve to displace, and the second expansion strip drives the first expansion strip, so that a plurality of groups of first expansion strips are propped up around the guide main body to support the urethral wall, and a path is dredged for the advancing of the catheter outside the expansion guide.
The expansion body is provided with at least 1 track groove parallel to the axis of the expansion guide, and the inner side of the end part of the sliding sleeve connected with the second expansion strip is provided with a bulge matched with the track groove.
The inner side of the end part of the sliding sleeve connected with the second expansion strip is provided with at least 1 track groove parallel to the axis of the expansion guide, and the expansion body part is provided with a bulge matched with the track groove.
The sliding sleeve and the guide body are of elongated structures, and when the sliding sleeve slides relatively, namely, when the sliding sleeve extrudes the expansion body, the sliding sleeve can possibly rotate circumferentially, and the expansion body can be possibly driven to rotate circumferentially, so that the expansion body cannot be expanded into an ideal shape. Thus, the present invention provides a relative track between the expansion body and the end of the sliding sheath that prevents rotation of the sliding sheath relative to the expansion guide. The opposite track comprises a track groove and a bulge, wherein the track groove can be arranged on the expansion body part or the sliding sleeve, and the bulge is correspondingly arranged on the sliding sleeve or the expansion body part
The external surface of the expansion body is provided with an elastic sleeve film matched with the expansion body.
The length of the elastic sleeve film is matched with that of the first expansion strip, and the inner side wall of the elastic sleeve film is fixedly connected with the first expansion strip. The elastic sleeve film increases the contact area between the expansion body and the urethra, reduces the pressure intensity, and reduces the uncomfortable feeling of the patient caused by the expansion of the expansion body
The guide seat comprises a guide seat lower part, a guide seat upper part and a sleeve seat sleeved on the guide seat upper part, one side of the sleeve seat, which is close to the guide main body, is provided with a round hole matched with the diameter of the guide core rod, and the diameter of the round hole is smaller than that of the sliding sleeve.
The sleeve seat and the upper part of the guide seat can slide relatively, the guide body passes through the round hole to be fixed with the upper part of the guide seat, and when the sleeve seat slides relatively to the upper part of the guide seat, the sleeve is pushed to move forward, so that the outer diameters of the guide seat and the sleeve seat are larger, and the operation on the expanding guide is facilitated.
Preferably, the outer surface of the upper part of the guide seat is provided with a first thread, and the inner surface of the sleeve seat is provided with a second thread matched with the first thread. The sleeve seat moves relative to the upper part of the guide seat through the threads, the advancing sliding sleeve can be effectively limited, the advancing sliding sleeve has a resetting trend under the reaction of the expanding body, and an operator can vacate both hands to operate the catheter after the limiting.
The invention has the advantages and positive effects that: by adopting the technical scheme, a new mode is provided for the intubation, the intubation resistance is small, and the pain of a patient is small.
Drawings
FIG. 1 is a schematic view of a structure of an unexpanded stent of a stent body
FIG. 2 is a schematic view of the structure of the dilation guide after inflation of the dilation body
FIG. 3 is a schematic view at A in FIG. 2
FIG. 4 is a schematic view at B in FIG. 2
In the figure:
1. introducer body 2, expansion body 3, and introducer seat
4. Guide wire sleeve 11, guide part 12, and expansion body part
13. Guide core bar 21, first expansion bar 22, second expansion bar
23. Elastic sleeve film 31, guide seat lower part 32, guide seat upper part
33. Socket
Detailed Description
Example 1
As shown in figures 1-4 of the drawings,
an dilation introducer, characterized by: including guide main part 11, expansion body 2, guide seat 3 and slip cap 4, guide main part 1 includes guide part 11, expansion body 12 and guide core bar 13 in proper order, and slip cap slides and overlaps in the guide core bar, and guide core bar 13 links to each other with guide seat 3, expansion body 2 sets up in expansion body 12, expansion body 2 includes 4 group expansion skeleton, expansion skeleton includes first expansion strip 21 and second expansion strip 22, and the one end and the guide part 11 of first expansion strip 21 are articulated, and the one end and the middle part of first expansion strip 21 of second expansion strip 22 are articulated, and the other end and the tip of slip cap 4 of second expansion strip 22 are articulated.
The expansion body 12 is provided with at least 1 track groove parallel to the axis of the expansion guide, and the inner side of the end part of the sliding sleeve 4 connected with the second expansion strip 22 is provided with a protrusion matched with the track groove.
The outer surface of the expansion body 2 is provided with an elastic sleeve film 23 matched with the expansion body 2.
The length of the elastic sleeve film 23 is matched with the length of the first expansion strip 21, and the inner side wall of the elastic sleeve film 23 is fixedly connected with the first expansion strip 21.
The guide seat 3 comprises a guide seat lower part 31, a guide seat upper part 32 and a sleeve seat 33 sleeved on the guide seat upper part 32, one side of the sleeve seat 33 close to the guide main body 1 is provided with a round hole matched with the diameter of the guide core rod 13, and the diameter of the round hole is smaller than that of the sliding sleeve 4.
The outer surface of the upper part 32 of the guide seat is provided with a first thread, and the inner surface of the sleeve seat 33 is provided with a second thread matched with the first thread.
Example 2
As shown in figures 1-4 of the drawings,
an dilation introducer, characterized by: including guide main part 11, expansion body 2, guide seat 3 and slip cap 4, guide main part 1 includes guide part 11, expansion body 12 and guide core bar 13 in proper order, and slip cap slides and overlaps in the guide core bar, and guide core bar 13 links to each other with guide seat 3, expansion body 2 sets up in expansion body 12, expansion body 2 includes 4 group expansion skeleton, expansion skeleton includes first expansion strip 21 and second expansion strip 22, and the one end and the guide part 11 of first expansion strip 21 are articulated, and the one end and the middle part of first expansion strip 21 of second expansion strip 22 are articulated, and the other end and the tip of slip cap 4 of second expansion strip 22 are articulated.
The inner side of the end part of the sliding sleeve 4 connected with the second expansion strip 22 is provided with at least 1 track groove parallel to the axis of the expansion guide, and the expansion body 12 is provided with a protrusion matched with the track groove.
The outer surface of the expansion body 2 is provided with an elastic sleeve film 23 matched with the expansion body 2.
The length of the elastic sleeve film 23 is matched with the length of the first expansion strip 21, and the inner side wall of the elastic sleeve film 23 is fixedly connected with the first expansion strip 21.
The guide seat 3 comprises a guide seat lower part 31, a guide seat upper part 32 and a sleeve seat 33 sleeved on the guide seat upper part 32, one side of the sleeve seat 33 close to the guide main body 1 is provided with a round hole matched with the diameter of the guide core rod 13, and the diameter of the round hole is smaller than that of the sliding sleeve 4.
The outer surface of the upper part 32 of the guide seat is provided with a first thread, and the inner surface of the sleeve seat 33 is provided with a second thread matched with the first thread.
Example 3
As shown in figures 1-4 of the drawings,
an dilation introducer, characterized by: including guide main part 11, expansion body 2, guide seat 3 and slip cap 4, guide main part 1 includes guide part 11, expansion body 12 and guide core bar 13 in proper order, and slip cap slides and overlaps in the guide core bar, and guide core bar 13 links to each other with guide seat 3, expansion body 2 sets up in expansion body 12, expansion body 2 includes 4 group expansion skeleton, expansion skeleton includes first expansion strip 21 and second expansion strip 22, and the one end and the guide part 11 of first expansion strip 21 are articulated, and the one end and the middle part of first expansion strip 21 of second expansion strip 22 are articulated, and the other end and the tip of slip cap 4 of second expansion strip 22 are articulated.
The expansion body 12 is provided with at least 1 track groove parallel to the axis of the expansion guide, and the inner side of the end part of the sliding sleeve 4 connected with the second expansion strip 22 is provided with a protrusion matched with the track groove.
The outer surface of the expansion body 2 is provided with an elastic sleeve film 23 matched with the expansion body 2.
The length of the elastic sleeve film 23 is matched with the length of the first expansion strip 21, and the inner side wall of the elastic sleeve film 23 is fixedly connected with the first expansion strip 21.
The guide seat 3 comprises a guide seat lower part 31, a guide seat upper part 32 and a sleeve seat 33 sleeved on the guide seat upper part 32, one side of the sleeve seat 33 close to the guide main body 1 is provided with a round hole matched with the diameter of the guide core rod 13, and the diameter of the round hole is smaller than that of the sliding sleeve 4.
The outer surface of the upper part 32 of the guide seat is provided with a first thread, and the inner surface of the sleeve seat 33 is provided with a second thread matched with the first thread.
The end surface of the sleeve seat 33, which is far away from the lower part 31 of the guide seat, is provided with a corrugated pipe, and the sum of the height of the corrugated pipe and the length of the sliding sleeve 4 is matched with the length of the guide core rod 13.
Because the expanding guide is used together with the sleeve, when the sleeve seat 33 drives the sliding sleeve 4 to move forwards, the corrugated pipe between the guide pipe and the end surface of the sleeve seat 33 far away from the lower part 31 of the guide seat is compressed, the resetting trend of the compressed corrugated pipe pushes the guide pipe to move forwards, and an operator does not need to push the guide pipe relative to the guide body 1, so that the insertion pipe is more convenient.
Example 4
As shown in figures 1-4 of the drawings,
an dilation introducer, characterized by: including guide main part 11, expansion body 2, guide seat 3 and slip cap 4, guide main part 1 includes guide part 11, expansion body 12 and guide core bar 13 in proper order, and slip cap slides and overlaps in the guide core bar, and guide core bar 13 links to each other with guide seat 3, expansion body 2 sets up in expansion body 12, expansion body 2 includes 4 group expansion skeleton, expansion skeleton includes first expansion strip 21 and second expansion strip 22, and the one end and the guide part 11 of first expansion strip 21 are articulated, and the one end and the middle part of first expansion strip 21 of second expansion strip 22 are articulated, and the other end and the tip of slip cap 4 of second expansion strip 22 are articulated.
The expansion body 12 is provided with at least 1 track groove parallel to the axis of the expansion guide, and the inner side of the end part of the sliding sleeve 4 connected with the second expansion strip 22 is provided with a protrusion matched with the track groove.
The outer surface of the expansion body 2 is provided with an elastic sleeve film 23 matched with the expansion body 2.
The length of the elastic sleeve film 23 is matched with the length of the first expansion strip 21, and the inner side wall of the elastic sleeve film 23 is fixedly connected with the first expansion strip 21.
The guide seat 3 comprises a guide seat lower part 31, a guide seat upper part 32 and a sleeve seat 33 sleeved on the guide seat upper part 32, one side of the sleeve seat 33 close to the guide main body 1 is provided with a round hole matched with the diameter of the guide core rod 13, and the diameter of the round hole is smaller than that of the sliding sleeve 4.
The outer surface of the upper part 32 of the guide seat is provided with a first thread, and the inner surface of the sleeve seat 33 is provided with a second thread matched with the first thread.
The end surface of the sleeve seat 33, which is far away from the lower part 31 of the guide seat, is provided with a spring, and the sum of the stretching length of the spring and the length of the sliding sleeve 4 is matched with the length of the guide core rod 13.
Many times, the expanding guide needs to be matched with the guide tube, when the sleeve seat 33 drives the sliding sleeve 4 to move forwards, the spring between the guide tube and the end face of the sleeve seat 33, which is far away from the lower part 31 of the guide tube seat, is compressed, the restoring trend of the compressed spring pushes the guide tube 5 to move forwards, and an operator does not need to push the guide tube relative to the guide tube body, so that the insertion tube is more convenient.
Example 5
As shown in figures 1-4 of the drawings,
an dilation introducer, characterized by: including guide main part 11, expansion body 2, guide seat 3 and slip cap 4, guide main part 1 includes guide part 11, expansion body 12 and guide core bar 13 in proper order, and slip cap slides and overlaps in the guide core bar, and guide core bar 13 links to each other with guide seat 3, expansion body 2 sets up in expansion body 12, expansion body 2 includes 4 group expansion skeleton, expansion skeleton includes first expansion strip 21 and second expansion strip 22, and the one end and the guide part 11 of first expansion strip 21 are articulated, and the one end and the middle part of first expansion strip 21 of second expansion strip 22 are articulated, and the other end and the tip of slip cap 4 of second expansion strip 22 are articulated.
The expansion body 12 is provided with at least 1 track groove parallel to the axis of the expansion guide, and the inner side of the end part of the sliding sleeve 4 connected with the second expansion strip 22 is provided with a protrusion matched with the track groove.
The outer surface of the expansion body 2 is provided with an elastic sleeve film 23 matched with the expansion body 2.
The length of the elastic sleeve film 23 is matched with the length of the first expansion strip 21, and the inner side wall of the elastic sleeve film 23 is fixedly connected with the first expansion strip 21.
The guide seat 3 comprises a guide seat lower part 31, a guide seat upper part 32 and a sleeve seat 33 sleeved on the guide seat upper part 32, one side of the sleeve seat 33 close to the guide main body 1 is provided with a round hole matched with the diameter of the guide core rod 13, and the diameter of the round hole is smaller than that of the sliding sleeve 4.
The outer surface of the upper part 32 of the guide seat is provided with a first thread, and the inner surface of the sleeve seat 33 is provided with a second thread matched with the first thread.
The sleeve seat 33 is slidably connected with the upper portion 32 of the guide seat, and the upper portion 32 of the guide seat is provided with a limiting device. The limiting device comprises a limiting rod penetrating through the upper portion 32 of the guide seat along the radial direction of the upper portion 32 of the guide seat, the length of the limiting rod is larger than the diameter of the upper portion 32 of the guide seat, and an elastic body is arranged in the middle of the limiting rod.
The introducer body 1 expands the urethra through the expander body 2, with the net effect of advancing the tube over the exterior of the expanded introducer. When the expandable body 2 is supported, the expandable body 2 is pressed by the urethral wall, the expandable body 2 tends to shrink inwards, the sliding sleeve 4 also tends to reset backwards, the sleeve seat 33 contacts with the sliding sleeve 4, and the sleeve seat 33 also tends to reset backwards, at this time, the sliding sleeve 4 and the introducer main body 1 need to be relatively fixed, that is, the sleeve seat 33 and the upper portion 32 of the introducer seat need to be relatively fixed, so as to keep the deformation of the expandable body 2. The elastic body is arranged in the limiting device, in a normal state, the elastic body is compressed, the length of the limiting rod is equal to the inner diameter of the sleeve seat 33, the limiting rod is positioned in the sleeve seat 33, when the sleeve seat 33 slides forwards, the tail end of the sleeve seat 33 is separated from the limiting rod, the elastic body of the limiting rod expands, the length of the limiting rod is larger than the inner diameter of the sleeve seat 33, and the limiting effect on resetting of the sleeve seat 33 is achieved
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (5)
1. An dilation introducer, characterized by: comprises a guide body, an expansion body, a guide seat and a sliding sleeve, wherein the guide body sequentially comprises a guide part, an expansion body and a guide core rod, the sliding sleeve is sleeved on the guide core rod in a sliding manner, the guide core rod is connected with the guide seat, the expansion body is arranged on the expansion body, the expansion body comprises at least 3 groups of expansion frameworks, each expansion framework comprises a first expansion strip and a second expansion strip, one end of each first expansion strip is hinged with the guide part, one end of each second expansion strip is hinged with the middle part of each first expansion strip, the other end of each second expansion strip is hinged with the end of the sliding sleeve, the sleeve seat is in sliding connection with the upper part of the guide seat, the upper part of the guide seat is provided with a limiting device, the limiting device comprises a limiting rod penetrating through the upper part of the guide seat along the radial direction of the upper part of the guide seat, the length of the limiting rod is larger than the diameter of the upper part of the guide seat, the middle part of the limiting rod is provided with an elastomer, the guide body expands the urethra through the expanding body, the final effect is that the tube body sleeved outside the expanding guide is advanced, when the expanding body is supported and opened, the expanding body is extruded by the urethral wall, the expanding body has a trend of inward contraction, the sliding sleeve also has a trend of backward resetting, the sleeve seat is contacted with the sliding sleeve, the sleeve seat also has a trend of backward resetting, at the moment, the sliding sleeve and the guide body are required to be relatively fixed, namely, the sleeve seat and the upper part of the guide seat are required to be relatively fixed, thereby the deformation of the expanding body is kept, the elastomer is arranged in the limiting device, the elastomer is compressed in a normal state, the length of the limiting rod is equal to the inner diameter of the sleeve seat, the limiting rod is positioned in the sleeve seat, when the sleeve seat slides forwards, the tail end of the sleeve seat is separated from the limiting rod, the elastic body of the limiting rod expands, the length of the limiting rod is larger than the inner diameter of the sleeve seat, the resetting of the sleeve seat is limited, the guide seat comprises a guide seat lower part, a guide seat upper part and a sleeve seat sleeved on the guide seat upper part, a round hole matched with the diameter of the guide core rod is formed in one side, close to the guide main body, of the sleeve seat, the diameter of the round hole is smaller than that of the sliding sleeve, a first thread is arranged on the outer surface of the guide seat upper part, and a second thread matched with the first thread is arranged on the inner surface of the sleeve seat.
2. The dilation introducer of claim 1, wherein: the expansion body is provided with at least 1 track groove parallel to the axis of the expansion guide, and the inner side of the end part of the sliding sleeve connected with the second expansion strip is provided with a bulge matched with the track groove.
3. The dilation introducer of claim 1, wherein: the inner side of the end part of the sliding sleeve connected with the second expansion strip is provided with at least 1 track groove parallel to the axis of the expansion guide, and the expansion body part is provided with a bulge matched with the track groove.
4. The dilation introducer of claim 1, wherein: the external surface of the expansion body is provided with an elastic sleeve film matched with the expansion body.
5. The dilation introducer of claim 4 wherein: the length of the elastic sleeve film is matched with that of the first expansion strip, and the inner side wall of the elastic sleeve film is fixedly connected with the first expansion strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810869410.8A CN109125891B (en) | 2018-08-02 | 2018-08-02 | Expansion guide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810869410.8A CN109125891B (en) | 2018-08-02 | 2018-08-02 | Expansion guide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109125891A CN109125891A (en) | 2019-01-04 |
| CN109125891B true CN109125891B (en) | 2024-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810869410.8A Active CN109125891B (en) | 2018-08-02 | 2018-08-02 | Expansion guide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109125891B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113171538B (en) * | 2021-05-06 | 2023-05-02 | 海安市人民医院 | Cut-off equipment for intestinal tract treatment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628143A (en) * | 2009-08-07 | 2010-01-20 | 中国人民解放军第三军医大学第一附属医院 | Intervention device with adjustable diameter |
| CN103156358A (en) * | 2013-03-29 | 2013-06-19 | 余德清 | Push-pull umbrella |
| CN106730279A (en) * | 2016-12-27 | 2017-05-31 | 重庆迪赛生物工程有限公司 | A kind of procteurynter |
| CN106963429A (en) * | 2017-03-30 | 2017-07-21 | 郭新辉 | The minimally invasive tunnel dilator of gasbag-type |
| CN207306970U (en) * | 2017-03-27 | 2018-05-04 | 安海慧 | A kind of medical procteurynter |
| CN207356353U (en) * | 2017-03-13 | 2018-05-15 | 刘少宁 | A kind of GI Medicine stomach inner wall brace type drug delivery device |
-
2018
- 2018-08-02 CN CN201810869410.8A patent/CN109125891B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628143A (en) * | 2009-08-07 | 2010-01-20 | 中国人民解放军第三军医大学第一附属医院 | Intervention device with adjustable diameter |
| CN103156358A (en) * | 2013-03-29 | 2013-06-19 | 余德清 | Push-pull umbrella |
| CN106730279A (en) * | 2016-12-27 | 2017-05-31 | 重庆迪赛生物工程有限公司 | A kind of procteurynter |
| CN207356353U (en) * | 2017-03-13 | 2018-05-15 | 刘少宁 | A kind of GI Medicine stomach inner wall brace type drug delivery device |
| CN207306970U (en) * | 2017-03-27 | 2018-05-04 | 安海慧 | A kind of medical procteurynter |
| CN106963429A (en) * | 2017-03-30 | 2017-07-21 | 郭新辉 | The minimally invasive tunnel dilator of gasbag-type |
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| Publication number | Publication date |
|---|---|
| CN109125891A (en) | 2019-01-04 |
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