CN217525243U - Brain tissue self-expander - Google Patents
Brain tissue self-expander Download PDFInfo
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- CN217525243U CN217525243U CN202221416266.0U CN202221416266U CN217525243U CN 217525243 U CN217525243 U CN 217525243U CN 202221416266 U CN202221416266 U CN 202221416266U CN 217525243 U CN217525243 U CN 217525243U
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Abstract
The utility model relates to a brain tissue is from expander, including sacculus pipe, tectorial membrane passageway and interior push rod, sacculus pipe includes outer body, sacculus pointed end, sacculus utricule and pipe seat, and outer body has exocoel and inner chamber, and the sacculus pointed end sets up the distal end at outer body, and the cladding of sacculus body is at the distal end of outer body, is provided with axial entry and side direction entry on the pipe seat, and the sacculus chamber of sacculus utricule is connected through the exocoel of outer body to the side direction entry, the inner chamber of outer body is connected to the axial entry. The film-coating channel is preset in the inner cavity at the far end of the outer tube body, is conveyed into the brain tissue through the outer tube body and is fixed through the inner push rod, the outer tube body is withdrawn, the film-coating channel is opened in a self-expanding mode, and the brain tissue channel is established. The utility model provides a brain tissue is from expander, from taking the sacculus expansion, the simplified operation process, the supporting apparatus of tectorial membrane passageway real-time adaptation, it is compatible good, and tectorial membrane passageway surface adopts smooth polymer membrane, can reduce frictional force, and inside metal framework self-expansion is even, reduces the damage to brain tissue.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to a brain tissue is from expander.
Background
Neuroendoscopy is a tool for observation and operation in endoscopic neurosurgery. As early as 1806, philipp Bozzini invented endoscopes and gradually became available for clinical use in multiple specialties. 1918. In the year Dandy uses a cystoscope to view the ventricles and names the endoscope as a "neuroendoscope". The neural endoscope commonly used in clinic includes a hard endoscope and a soft endoscope, and the latter develops through two stages of an optical fiber endoscope and an electronic soft endoscope. Neuroendoscopy has become one of the main development directions of modern micro-invasive neurosurgery, and has good treatment effects on diseases such as hydrocephalus, intracranial arachnoid cyst, intracerebral hematoma, cerebral hemorrhage, brain tumor, ventricular tumor and the like. The principle of neuroendoscopy is that the neuroendoscopy directly enters a ventricle through a micro-channel and then carries out surgical operation under the observation of local visual field of an endoscope, so that a channel sheath tube system which can quickly establish a brain channel and has minimum trauma to brain tissues is developed and is a key factor for realizing successful operation.
In the prior art, a commonly-used ventricular puncture needle can establish a channel for placing a ventricular drainage tube, and has the advantages of compactness and convenience, and the defect that the puncture needle can only probe and can not realize the retraction of cerebral tissues, other similar tissue retractors, such as single balloon catheter expansion, need to be expanded for multiple times in advance and then inserted with a subsequent sheath tube, and the size of the sheath tube is difficult to be accurately matched with or matched with an actual channel after the sheath tube is expanded. The brain tissue route sheath pipe on the existing market all adopts traditional stereoplasm body design, and the body itself is invariable diameter, and the unfavorable factor that causes like this has: (1) The initial diameter of the tube body must be designed to be large enough to be matched with the size of a subsequent endoscope, and the large size design is easy to damage brain tissues in the process of establishing a channel; (2) The tube body does not have the adjustable function, and is only used for matching endoscopes or surgical instruments with specific sizes, so that the operation compatibility is poor.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a brain tissue self-expander to solve the technical problems existing in the prior art.
In order to achieve the above object, the present invention provides a brain tissue self-expander, comprising:
a balloon catheter, the balloon catheter comprising:
an outer tube comprising an outer lumen and an inner lumen;
a balloon tip connected to a distal end of the outer tube body;
the balloon body is arranged on the outer side of the far end of the outer tube body, and a balloon cavity of the balloon body is communicated with the outer cavity of the outer tube body;
a catheter holder connected with the proximal end of the outer tube body; the catheter holder comprises an axial inlet and a lateral inlet, the axial inlet is communicated with the inner cavity of the outer tube, and the lateral inlet is communicated with the outer cavity of the outer tube;
the film coating channel is arranged in the inner cavity of the far end of the outer tube body;
the inner push rod is arranged in the inner cavity of the outer tube body through the axial inlet of the catheter holder, and the far end of the inner push rod is connected with the near end of the film coating channel; an inner push rod base is arranged at the near end of the inner push rod;
the outer tube body sends the film covering channel into the brain tissue, an external injector injects normal saline into the balloon body along the outer cavity of the outer tube body through the lateral inlet, the balloon body expands, the inner push rod is inserted into the inner cavity of the outer tube body along the axial inlet, the far end of the inner push rod is anchored with the near end of the film covering channel, the injector extracts the normal saline in the balloon body, the balloon body retracts, the inner push rod fixes the film covering channel, the outer tube body is retracted, the film covering channel is exposed out of the far end of the outer tube body, and the film covering channel is opened by self expansion to form the brain tissue channel.
In some aspects, the lamination channel comprises a metal skeleton layer, a polymer outer layer film and a polymer inner layer film;
the polymer outer layer film and the polymer inner layer film form a closed structure, and the metal framework layer is arranged in the closed structure.
In some aspects, the metal skeleton layer is a laser engraved structure or a braided structure.
In some aspects, the proximal end of the graft channel in a naturally open state is flared.
In some aspects, the balloon tip is spherical in shape;
the length range of the balloon tip is 1-5 mm.
In some aspects, the length of the balloon body ranges from 30 to 60mm;
the diameter range of the expanded balloon body is 9-25 mm.
In some aspects, the inner diameter of the outer tube body ranges from 3 mm to 10mm;
the diameter range of the inner push rod is 2-7 mm.
In some aspects, the length of the coating channel ranges from 60mm to 120mm;
the inner diameter range of the film covering channel in a natural opening state is 8-22 mm.
The embodiment of the utility model provides a brain tissue is from expander, including the sacculus pipe, tectorial membrane passageway and interior push rod, the sacculus pipe includes outer body, sacculus pointed end, sacculus utricule and conduit saddle, outer body includes exocoel and inner chamber, the most advanced distal end that sets up at outer body of sacculus, the sacculus chamber that sacculus body set up at the distal end of outer body and sacculus body is linked together with the exocoel of outer body, the conduit saddle sets up the near-end at outer body, including axial entry and side direction entry, axial entry is linked together with the inner chamber of outer body, side direction entry is linked together with the exocoel of outer body, tectorial membrane passageway compression sets up in the inner chamber of outer body distal end, the axial entry that interior push rod passes through the conduit saddle sets up in the inner chamber of outer body, the distal end of interior push rod is connected with the near-end of tectorial membrane passageway, the near-end of interior push rod is provided with interior push rod base. The utility model discloses a tectorial membrane passageway that outer body and interior push rod mutually supported will have the shape memory function transports to brain tissue and release, makes tectorial membrane passageway self-expansion form brain tissue passageway. The utility model provides a brain tissue is from expander can establish the operation passageway fast, and furthest reduces the damage to the brain tissue, and the passageway of establishing is the variable diameter design, the tissue passageway after the identical utricule that can be better expands in advance, operation process easy operation.
Drawings
Fig. 1 is a schematic structural diagram of a brain tissue self-dilator according to an embodiment of the present invention;
fig. 2 is a schematic radial cross-sectional view of a film coating channel provided in an embodiment of the present invention;
fig. 3 is a schematic side view of a film covering channel in a naturally open state according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a brain tissue self-dilator according to an embodiment of the present invention;
fig. 5 is a second schematic view of the brain tissue self-dilator according to the embodiment of the present invention;
fig. 6 is a third schematic view of the brain tissue self-dilator according to the embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
The embodiment of the utility model provides a brain tissue is from expander, including the sacculus pipe, tectorial membrane passageway and interior push rod, the sacculus pipe includes outer body, sacculus pointed end, sacculus utricule and conduit saddle, outer body includes exocoel and inner chamber, the most advanced distal end that sets up at outer body of sacculus, the sacculus chamber that sacculus body set up at the distal end of outer body and sacculus body is linked together with the exocoel of outer body, the conduit saddle sets up the near-end at outer body, including axial entry and side direction entry, axial entry is linked together with the inner chamber of outer body, side direction entry is linked together with the exocoel of outer body, tectorial membrane passageway compression sets up in the inner chamber of outer body distal end, the axial entry that interior push rod passes through the conduit saddle sets up in the inner chamber of outer body, the distal end of interior push rod is connected with the near-end of tectorial membrane passageway, the near-end of interior push rod is provided with interior push rod base. The utility model discloses a tectorial membrane passageway that outer body and interior push rod mutually supported will have the shape memory function transports to brain tissue and release, makes tectorial membrane passageway self-expansion form brain tissue passageway. The utility model provides a brain tissue is from expander can establish the operation passageway fast, and furthest reduces the damage to the brain tissue, and the passageway of establishing is the variable diameter design, the tissue passageway after the identical utricule that can be better expands in advance, operation process easy operation.
The present invention is described in detail below with reference to specific embodiments, but it should be understood that the following embodiments are not intended to limit the present invention, and those skilled in the art can conceive of the arrangement and combination of specific features in the embodiments to form other similar schemes based on the concept of the present invention.
As discussed herein, the term "distal" or "proximal" is used hereinafter with respect to a description of a position or orientation relative to a handheld end of a treating physician or medical interventionalist. "distal" or "distal side" is a location that is distal to the direction of the hand-held end of the physician or interventionalist, and is not limited to a particular end point, but may also be a location that is proximal to an end point. "proximal" or "proximal side" is a location near the direction of the physician or interventionalist's hand-held end.
Fig. 1 is a schematic structural view of a brain tissue self-dilator according to an embodiment of the present invention, as shown in fig. 1, the brain tissue self-dilator includes: a balloon catheter 1, a film covering channel 2 and an inner push rod 3; the balloon catheter 1 comprises a balloon tip 11, a balloon body 12, an outer tube body 13 and a catheter seat 14, wherein the catheter seat 14 is provided with an axial inlet 141 and a lateral inlet 142, and the proximal end of the inner push rod 3 is provided with an inner push rod base 31.
Wherein, the sacculus pointed end 11 is arranged at the far end of the outer tube body 13, the sacculus pointed end 11 is processed into a smooth spherical surface shape so as to reduce the damage to the brain tissue, and the length range of the sacculus pointed end 11 is 1-5 mm. The balloon body 12 is arranged at the far end of the outer tube body 13 and wraps the far end of the outer tube body 13, the outer tube body 13 is of a double-cavity structure and comprises an outer cavity and an inner cavity, the balloon cavity of the balloon body 12 is communicated with the outer cavity of the outer tube body 13, and a filling medium can be injected into the balloon cavity of the balloon body 12 through the outer cavity of the outer tube body 13 to expand the balloon body 12, so that the brain tissue is pre-expanded, and the filling medium is generally physiological saline. The inner cavity of the outer tube body 13 is used for placing the film coating channel 2 and the inner push rod 3. The balloon body 12 may be made of Pebax, nylon, silica gel or polyurethane. The length range of the balloon body 12 is 30-60 mm, and the diameter range of the expanded balloon body 12 is 9-25 mm. The outer tube 13 is made of Pebax, nylon, PA, high density polyethylene, polypropylene, polytetrafluoroethylene, or other polymer materials. The inner diameter of the outer tube 13 ranges from 3 mm to 10mm.
A catheter hub 14 is connected to the proximal end of the outer tube body 13, and an axial inlet 141 and a lateral inlet 142 are provided on the catheter hub 14, wherein the axial inlet 141 communicates with the inner cavity of the outer tube body 13, and the lateral inlet 142 communicates with the outer cavity of the outer tube body 13. The catheter hub 14 is made of polycarbonate, polyamide or the like.
The axial entry 141 that tectorial membrane passageway 2 passes through catheter hub 14 sets up in the inner chamber of the distal end of outer body 13, fig. 2 does the utility model discloses the radial section schematic diagram of tectorial membrane passageway that the embodiment provided, as shown in fig. 2, the radial section of tectorial membrane passageway 2 is three layer construction, the middle major structure of tectorial membrane passageway 2 is metal skeleton layer 22, the surface of metal skeleton layer 22 is provided with the outer membrane 21 of polymer, the internal surface of metal skeleton layer 22 is provided with polymer inner-layer membrane 23, wherein, the outer membrane 21 of polymer and polymer inner-layer membrane 23 form the closed structure, this closed structure is including with metal skeleton layer 22 parcel. The polymer outer layer membrane 21 and the polymer inner layer membrane 23 are both smooth-surfaced membranes made of polymer materials, such as PTFE membranes or ePTFE membranes. The smooth polymer outer layer film 21 can reduce the friction with the brain tissue, and simultaneously, the metal framework layer 22 is completely isolated from the brain tissue, so that the damage to the brain tissue is reduced.
The metal framework layer 22 of the film covering channel 2 is a metal framework made of nickel-titanium memory alloy, can be a laser-engraved structure or a braided structure, has a good shape memory effect, and is cylindrical or has a flared proximal end in a naturally opened state. Fig. 3 is the schematic diagram of looking sideways at the tectorial membrane passageway under the natural open state that the embodiment of the utility model provides, as shown in fig. 3, under the state of opening naturally, the near-end of tectorial membrane passageway 2 has the opening 24 of horn mouth shape, and the opening of horn shape can make things convenient for the leading-in of scope or other supporting apparatus more. The inner diameter range of the film covering channel 2 after being completely opened is 8-22 mm, so that the operation of a doctor is convenient when the film covering channel is used for establishing an endoscopic surgery channel in brain tissue. The effective length range of the film coating channel 2 is 60-120 mm.
The inner push rod 3 is disposed in the lumen of the outer tube body 13 through the axial inlet 141 of the catheter hub 14 into the lumen of the outer tube body 13, and the distal end of the inner push rod 3 is fixedly or anchored with the proximal end of the covered passageway 2. The proximal end of the inner push rod 3 is provided with an inner push rod base 31 for hand-held operation. The inner push rod 3 is of a solid tube body structure and is used for increasing the rigidity of the inner push rod 3, the far end of the inner push rod 3 is processed into a flat or conical structure, the outer diameter of the inner push rod 3 is compatible with the inner cavity of the outer tube body 13, the diameter range of the inner push rod 3 is 2-7 mm, the inner push rod is slightly smaller than the inner diameter of the inner cavity of the outer tube body 13, and the inner push rod can smoothly pass through the inner cavity.
Fig. 4, fig. 5 and fig. 6 are one, two and three schematic working diagrams of the brain tissue self-dilator according to an embodiment of the present invention, as shown in fig. 4-6, firstly, a suitable specification and model of the coating channel 2 are selected, in this embodiment, the selected initial inner diameter is 12mm, and generally, the inner diameter of the coating channel 2 is 1-5 mm larger than the expected matching endoscope size, the coating channel 2 is pre-loaded into the inner cavity at the distal end of the outer tube 13 of the balloon catheter 1 after being compressed, and the coating channel 2 is delivered into the brain tissue 4 to be dilated through the outer tube 13, a syringe or a matched pressure pump is connected to the lateral inlet 142 of the catheter seat 14, the syringe delivers physiological saline into the balloon cavity of the balloon body 12 along the outer cavity of the outer tube 13 through the lateral inlet 142, so as to properly dilate the balloon body 12, the effective length of the balloon body 12 is 50mm, the effective length of the coating channel 2 is 100mm, and therefore, the balloon body 12 is required to perform segmented multiple dilatation on the brain tissue 4 to complete the pre-dilated channel.
After the primary expansion is completed by using the balloon body 12, the inner push rod 3 is inserted into the inner cavity of the outer body 13 through the axial inlet 141 of the catheter holder 14, the far end of the inner push rod 3 is fixedly or anchored with the near end of the coating channel 2 in the compressed state, and meanwhile, the physiological saline inside the balloon body 12 is pumped out to release the pressure of the balloon body 12 to the lowest state, then the inner push rod 3 is fixed, the balloon catheter 1 is withdrawn, the coating channel 2 in the compressed state is exposed, and the coating channel 2 is enabled to complete the in-situ release.
After the tectorial membrane passageway 2 breaks away from the constraint of the inner chamber of outer body 13, self-expansion is fully opened, its outer wall is fully laminated with brain tissue 4, and form a stable brain tissue inner channel, at this moment, the internal diameter of tectorial membrane passageway 2 that opens completely is 9mm, at this moment, because the constraint of brain tissue 4, the internal diameter of tectorial membrane passageway 2 can not fully expand to 12mm of initial state, the inner wall of passageway is made for smooth macromolecular material, can reduce the frictional force between its and supporting apparatus, when carrying out the internal diameter operation, tectorial membrane passageway 2 can be under the extrusion of supporting apparatus, the internal diameter increases to initial 12mm thereupon, when the extrusion of supporting apparatus is removed, the internal diameter of tectorial membrane passageway 2 will have certain degree's retraction, but can not be less than 9mm.
The embodiment of the utility model provides a brain tissue is from expander, including the sacculus pipe, tectorial membrane passageway and interior push rod, the sacculus pipe includes outer body, sacculus pointed end, sacculus utricule and conduit saddle, outer body includes exocoel and inner chamber, the most advanced distal end that sets up at outer body of sacculus, the sacculus chamber that sacculus body set up at the distal end of outer body and sacculus body is linked together with the exocoel of outer body, the conduit saddle sets up the near-end at outer body, including axial entry and side direction entry, axial entry is linked together with the inner chamber of outer body, side direction entry is linked together with the exocoel of outer body, tectorial membrane passageway compression sets up in the inner chamber of outer body distal end, the axial entry that interior push rod passes through the conduit saddle sets up in the inner chamber of outer body, the distal end of interior push rod is connected with the near-end of tectorial membrane passageway, the near-end of interior push rod is provided with interior push rod base. The utility model discloses a tectorial membrane passageway that outer body and interior push rod mutually supported will have the shape memory function transports to brain tissue and release, makes tectorial membrane passageway self-expansion form brain tissue passageway.
The utility model provides a brain tissue is from expander, adopt the pipe that has the sacculus utricule to mutually support with the tectorial membrane passageway that has shape memory function, from the outer body of taking sacculus expansion, operation process has been simplified greatly, after using sacculus full to accomplish the preliminary expansion to brain tissue, can be rapidly to sacculus pressure release, with the help of the fixed or anchoring of inner push rod with the tectorial membrane passageway, carry out former release with the tectorial membrane passageway, after the tectorial membrane passageway releases in brain tissue, because from the expanding force, can keep firm passageway, utilize the operation, and the initial state that is in moderate degree compression of tectorial membrane passageway after releasing in brain tissue, when receiving scope or the outer crowded effect when supporting apparatus passes through, the tectorial membrane passageway can adapt to the size of supporting apparatus in real time, expand to required size, compatibility is good; the inner surface and the outer surface of the laminating channel are designed by adopting smooth polymer films, so that the friction force between the channel and brain tissues can be reduced, and meanwhile, the metal framework layer can be more uniformly expanded, and the damage to the brain tissues is reduced.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A brain tissue self-expander, comprising:
a balloon catheter, the balloon catheter comprising:
an outer tube comprising an outer lumen and an inner lumen;
a balloon tip connected to the distal end of the outer tube body;
the balloon body is arranged on the outer side of the far end of the outer tube body, and a balloon cavity of the balloon body is communicated with the outer cavity of the outer tube body;
a catheter holder connected with the proximal end of the outer tube body; the catheter holder comprises an axial inlet and a lateral inlet, the axial inlet is communicated with the inner cavity of the outer tube, and the lateral inlet is communicated with the outer cavity of the outer tube;
the film coating channel is arranged in the inner cavity of the far end of the outer tube body;
the inner push rod is arranged in the inner cavity of the outer tube body through the axial inlet of the catheter holder, and the distal end of the inner push rod is connected with the proximal end of the film coating channel; an inner push rod base is arranged at the near end of the inner push rod;
the outer tube body sends the film covering channel into the brain tissue, an external injector injects physiological saline into the balloon body along the outer cavity of the outer tube body through the lateral inlet, the balloon body expands, the inner push rod is inserted into the inner cavity of the outer tube body along the axial inlet, the far end of the inner push rod is anchored with the near end of the film covering channel, the injector extracts the physiological saline in the balloon body, the balloon body retracts, the inner push rod fixes the film covering channel, the outer tube body retracts, the film covering channel is exposed out of the far end of the outer tube body, and the film covering channel is opened by self expansion to form the brain tissue channel.
2. The brain tissue self-expander according to claim 1, wherein the tectorial membrane channel comprises a metal skeleton layer, a macromolecule outer membrane and a macromolecule inner membrane;
the polymer outer layer film and the polymer inner layer film form a closed structure, and the metal framework layer is arranged in the closed structure.
3. The brain tissue self-expander according to claim 2, wherein the metal scaffold layer is a laser engraved structure or a braided structure.
4. The brain tissue self-dilator according to claim 1, wherein the proximal end of the membrane channel in a naturally open state is flared.
5. The brain tissue self-dilator of claim 1, wherein the balloon tip is spherical in shape;
the length range of the balloon tip is 1-5 mm.
6. The brain tissue self-expander according to claim 1, wherein the length of the balloon body ranges from 30 to 60mm;
the diameter range of the expanded balloon body is 9-25 mm.
7. The brain tissue self-expander according to claim 1, wherein the inner diameter of the outer tube body ranges from 3 to 10mm;
the diameter range of the inner push rod is 2-7 mm.
8. The brain tissue self-expander according to claim 1, wherein the length of the coating channel ranges from 60 to 120mm;
the inner diameter range of the film covering channel in a natural opening state is 8-22 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221416266.0U CN217525243U (en) | 2022-06-08 | 2022-06-08 | Brain tissue self-expander |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221416266.0U CN217525243U (en) | 2022-06-08 | 2022-06-08 | Brain tissue self-expander |
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| Publication Number | Publication Date |
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| CN217525243U true CN217525243U (en) | 2022-10-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221416266.0U Active CN217525243U (en) | 2022-06-08 | 2022-06-08 | Brain tissue self-expander |
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- 2022-06-08 CN CN202221416266.0U patent/CN217525243U/en active Active
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Address after: 101204 building 4, yard 21, Panlong West Road, Mafang Town, Pinggu District, Beijing Patentee after: Beijing Taijieweiye Technology Co.,Ltd. Address before: 101204 building 4, yard 21, Panlong West Road, Mafang Town, Pinggu District, Beijing Patentee before: BEIJING TAIJIE WEIYE TECHNOLOGY Co.,Ltd. |