CN213883678U - Carbon fiber/carbon composite material C-shaped artificial trachea bracket - Google Patents
Carbon fiber/carbon composite material C-shaped artificial trachea bracket Download PDFInfo
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- CN213883678U CN213883678U CN202022160719.5U CN202022160719U CN213883678U CN 213883678 U CN213883678 U CN 213883678U CN 202022160719 U CN202022160719 U CN 202022160719U CN 213883678 U CN213883678 U CN 213883678U
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Abstract
The utility model provides a carbon fiber/carbon composite material C-shaped artificial trachea support. The C-shaped artificial trachea bracket consists of a single C-shaped trachea bracket unit or consists of at least two C-shaped trachea bracket units which are combined side by side; the main body of the C-shaped tracheal stent unit is in a U-shaped or pear-shaped belt-shaped structure; the C-shaped tracheal stent unit is composed of a carbon fiber/carbon composite material matrix and a carbon coating on the surface of the carbon fiber/carbon composite material matrix. The C-shaped artificial trachea stent has good biocompatibility and mechanical property, high surface hardness, small friction coefficient, difficult damage and similar elastic modulus with cartilage, has high matching degree of the biomechanical property when being jointed with an autologous trachea port, can realize biological fixation, is particularly similar to a tracheal cartilage ring structure, can be folded and unfolded in the breathing process through the C-shaped opening, and meets the physiological function.
Description
Technical Field
The utility model relates to an artificial trachea support, in particular to a C-shaped artificial trachea support composed of carbon fiber/carbon composite materials, which belongs to the technical field of biological structure repair.
Background
Clinically, the resection of a long trachea caused by tumor, trauma and the like has become a necessary trend to adopt artificial materials for reconstruction. However, the complexity of the tracheal tissue environment has high requirements for substitutes, and many challenges are posed to artificial tracheal materials, such as incapability of achieving biological fusion and fixation with the body after being transplanted in the body, improper port connection, accompanying drop, leakage, stenosis or infarction, etc., trachea expansion and contraction function recovery in the respiratory process, etc.
In the prior art, chinese patent (CN 100428919C) discloses an artificial trachea, which uses a polytetrafluoroethylene porous trachea prosthesis as a main body of the trachea and combines a titanium ring to realize end connection. The titanium ring and the autologous bone have larger elastic modulus difference, which causes the atrophy of the autologous tissue and leads to the rupture of the anastomotic orifice. Chinese patent (CN 105056302B) discloses an artificial trachea, which adopts a hollow tubular shaped structure made by 3D printing, and also faces the problem of end fixing, and meanwhile, the trachea expansion and contraction in the breathing process cannot be realized. Chinese patent (CN 105055060B) discloses a tracheal stent using Polycaprolactone (PCL) as C-shaped ring. There is a continued stenosis or failure due to the weakening of the tubular structure of the trachea after degradation of the PCL.
SUMMERY OF THE UTILITY MODEL
Defect to the artificial trachea support among the prior art existence, the utility model aims at providing a carbon fiber/carbon composite material C shape artificial trachea support, this trachea support comprises carbon fiber/carbon composite, good biocompatibility and mechanical properties have, top layer hardness is high, the coefficient of friction is little, it is difficult damaged, can block droing of carbon back granule, avoid the black skin effect, and have similar elastic modulus with cartilage, when joining with the trachea port, the biomechanics performance goodness of fit is high, can realize biological fixed, especially it is similar to trachea cartilage loop structure, through C shape opening, can receive in the respiratory process and open, satisfy physiological function.
In order to achieve the technical purpose, the utility model provides a carbon fiber/carbon composite material C-shaped artificial trachea stent, which is composed of a single C-shaped trachea stent unit or at least two C-shaped trachea stent units which are combined side by side; the main body of the C-shaped tracheal stent unit is of a U-shaped or pear-shaped belt-shaped structure; the C-shaped tracheal stent unit is composed of a carbon fiber/carbon composite material matrix and a carbon coating on the surface of the carbon fiber/carbon composite material matrix.
Preferably, the thickness of the belt-shaped structure is 0.5mm to 2.0mm, and the width is 3mm to 10 mm. The thickness design is close to the wall thickness of the air pipe, and the width design is beneficial to assembling into the actual length according to the actual requirement.
Preferably, the wall of the belt-shaped structure is provided with a fixing hole. The fixing hole is favorable for fixing the artificial trachea bracket in the practical application process.
Preferably, the strap-like structure is either eared or ungeared at both ends. The ear shape of the port can avoid stimulating surrounding tissues and can also increase the bearing area of the port. The ear sections at the two ends of the belt-shaped structure are circular, drop-shaped or oval or other irregular shapes.
Preferably, the size of the hole diameter of the fixing hole is 0.5mm to 2.0 mm.
Preferably, the carbon fiber/carbon composite material matrix is composed of a carbon fiber fabric and a carbon matrix inside the carbon fiber fabric (the carbon matrix is distributed on the surface of the carbon fibers and filled among the carbon fibers).
As one preference, the carbon fiber fabric has a braided structure. The carbon fiber fabric with the braided structure has better mechanical property.
Preferably, more than two C-shaped tracheal stent units are combined side by side according to the central axis of the C-shaped tracheal stent unit to form a hollow tubular structure with an axial notch on the side wall. The communicated gap in the tracheal stent can facilitate blood supply.
As one preference, the carbon coating is a pyrolytic carbon coating or/and a diamond-like coating. The carbon coating has high hardness and small friction coefficient, is not easy to damage, and can block the falling of carbon-based particles to avoid the black skin effect.
The utility model provides a carbon fiber/carbon composite material C shape artificial trachea support can constitute or constitute by two at least C shape trachea support units side by single C shape trachea support unit, and the different length is found to the C shape trachea support unit of selecting different quantity according to the usage difference, can be used for with autologous trachea tissue tip overlap joint fixed or can be used to do the tracheal cartilage ring of artificial hand.
The carbon fiber/carbon composite material C-shaped artificial trachea bracket provided by the utility model has the mass percentage content of carbon fiber of 60% -80% and the mass percentage content of carbon matrix of 20% -40%.
The utility model provides a preparation method of carbon fiber/carbon composite material C shape artificial trachea support, including following specific steps as follows:
1) weaving a plurality of (such as 1k (k represents one thousand), 1.5k, 3k and 6k) carbon fibers into a carbon fiber braid (specifically, weaving at least two carbon fiber bundles into the carbon fiber braid, or twisting at least two carbon fiber bundles into a carbon fiber rope, weaving at least two carbon fiber ropes into the carbon fiber braid), and then manufacturing the carbon fiber braid into a carbon fiber preform with a U-shaped or pear-shaped cross section through a mold;
2) the carbon fiber prefabricated body is densified through chemical vapor deposition and/or liquid impregnation to prepare a required carbon fiber/carbon composite material C-shaped artificial trachea support blank;
the process of densifying matrix carbon by chemical vapor deposition comprises the following steps: placing the carbon fiber preform in a deposition furnace, introducing a carbon-containing gas source at the temperature of 850-1300 ℃, and depositing for 10-100 h; the process of impregnating-cracking densified matrix carbon comprises the following steps: sequentially carrying out resin or asphalt vacuum pressure impregnation, curing and cracking treatment on the carbon fiber preform; the dipping pressure is 1.0MPa to 5.0MPa, and the dipping time is 2h to 10 h; the curing temperature is 160-230 ℃, and the curing time is 10-50 h; the cracking temperature of the resin is 900-1050 ℃, the pressure is normal pressure, and the cracking time is 2-20 h; the cracking temperature of the asphalt is 750-850 ℃, the pressure is 50-200 MPa, and the dipping time is 2-10 h;
3) machining a C-shaped artificial trachea support blank, wherein the machining comprises cutting end parts or machining fixing holes and the like, and the hole diameter is 0.5-2.0 mm, the fixing holes can be reserved in the preparation process of the carbon fiber preform, so that the mechanical property deterioration caused by damage to a C-shaped artificial trachea support reinforcement removed in later-stage machining can be effectively avoided;
4) placing the machined C-shaped artificial trachea support blank into a high-temperature furnace, and heating under the vacuum or protective atmosphere condition to carry out impurity removal treatment (the step can be selected according to requirements), wherein the treatment conditions are as follows: keeping the temperature at 1500-2300 ℃ for 1-10 h;
5) preparing a pyrolytic carbon coating or/and a diamond-like carbon coating on the surface of a carbon fiber/carbon composite material C-shaped artificial trachea stent blank to obtain a carbon fiber/carbon composite material C-shaped artificial trachea stent; the pyrolytic carbon coating is generated by chemical vapor deposition, and the generation conditions are as follows: depositing a gas carbon source (such as natural gas, methane, propylene and other common gas carbon sources) at 900-1500 ℃ for 10-50 h; the diamond-like coating is generated by magnetron sputtering, and the generation conditions are as follows: vacuum degree of 1X 10-1Pa～5×10-1Pa; the negative bias voltage of the workpiece is 10V-200V; ar flow is 50 sccm-120 sccm; the power of the graphite target is 1 kW-3 kW, and the purity is not lower than 99.99 wt%; the heating temperature is 80-200 ℃; the deposition time is 10min to 180 min; alternatively, the diamond-like coating is generated by plasma enhanced chemical vapor deposition under the conditions: vacuum degree of 1X 10-1Pa～5×10-1Pa; the negative bias voltage of the workpiece is 10V-200V; ar flow is 50 sccm-120 sccm; the power of the ion source is 0.5 kW-5 kW; hydrocarbon gas (e.g. CH)4、C2H2Etc.) the flow rate is 10sccm to 500 sccm; the heating temperature is 80-300 ℃; the deposition time is 10 min-180 min, or chemical vapor deposition is firstly carried outAnd depositing the generated pyrolytic carbon coating, and generating a diamond-like coating through magnetron sputtering or plasma enhanced chemical vapor deposition to obtain the composite coating.
Compared with the prior art, the utility model discloses the beneficial technological effect who brings:
1) the utility model provides a C shape tracheal stent comprises carbon fiber carbon composite, and intensity is high, does not degrade, has good support performance, durable.
2) The utility model provides a C shape tracheal stent has the elastic modulus similar with the cartilage, and when joining with autologous trachea port, the biomechanics performance goodness of fit is high, can realize that biology is fixed.
3) The utility model provides a C shape tracheal stent surface high porosity is favorable to organizing to adhere to, and the space of inside UNICOM can be convenient for blood supply moreover.
4) The utility model provides a C shape tracheal stent has and is similar to trachea cartilage ring, through C shape opening, can receive in the respiratory process and open, satisfies physiological function.
5) The utility model provides a C shape tracheal tube support both ends port ear shape can avoid amazing tissue on every side, also can increase port load area.
6) The C-shaped tracheal stent provided by the utility model has good biocompatibility.
7) The utility model provides a C shape tracheal stent top layer hardness is high, and coefficient of friction is little, not only is difficult damaged, can block droing of carbon back granule moreover, avoids the black skin effect.
8) The utility model provides a C shape tracheal stent mechanical properties is excellent: the tensile strength is more than 90MPa, the tensile modulus is 3 GPa-8 GPa, and the cross section tension deformation is 0-50%.
Drawings
FIG. 1 is a side view of a C-shaped tracheal stent unit in the form of a U-shaped band with ears;
FIG. 2 is a side view of a C-shaped tracheal stent unit in the form of an eared pear belt;
FIG. 3 is a front view of a C-shaped tracheal stent unit in the form of a U-shaped band with ears;
FIG. 4 is a front view of a C-shaped artificial trachea stent made of carbon fiber/carbon composite materials and formed by combining a plurality of C-shaped trachea stent units with ear-shaped U-shaped band structures side by side;
FIG. 5 is a schematic cross-sectional view of a C-shaped artificial trachea stent made of carbon fiber/carbon composite material;
wherein, 1 is the ear of C shape trachea support unit, 2 is U-shaped banded structure, and 3 are pear shape banded structure, and 4 are the fixed orifices, and 5 are carbon fiber/carbon composite substrate, and 6 are the carbon coating.
Detailed Description
The following embodiments are further intended to specifically describe the present invention with reference to the attached drawings, and the protection scope of the present invention is not limited by the embodiments.
The carbon fiber/carbon composite material C-shaped artificial trachea bracket provided by the utility model is shown in figures 1-5. The carbon fiber/carbon composite material C-shaped artificial trachea stent is formed by a single C-shaped trachea stent unit (specifically shown in figure 3), or is formed by combining at least two C-shaped trachea stent units side by side, the number of the C-shaped trachea stent units is determined according to the actual trachea repair requirement, C-shaped artificial trachea stents with different lengths can be constructed, and the C-shaped artificial trachea stent shown in figure 4 is formed into a hollow tubular structure with axial notches on the side wall by combining 8C-shaped trachea stent units side by side according to the central axis of the C-shaped trachea stent units. The main body of the C-shaped tracheal stent unit is of a U-shaped 2 or pear-shaped 3 belt-shaped structure, the thickness of the belt-shaped structure is about 1.0mm, the width of the belt-shaped structure is about 6mm, the two ends of the belt-shaped structure are provided with or without lugs 1, the lugs are round (shown in figure 2) or drop-shaped (shown in figure 1), and the like, the lug shape of the port can avoid stimulating surrounding tissues, and the bearing area of the port can be increased. The wall of the strip-shaped structure is provided with a plurality of fixing holes, the fixing holes are uniformly distributed along the strip-shaped structure, the number of the fixing holes is determined according to the use requirement, and the aperture size of the fixing hole 4 is about 1.0 mm. The C-shaped tracheal stent unit is composed of a carbon fiber/carbon composite material matrix 5 and a carbon coating 6 on the surface of the carbon fiber/carbon composite material matrix, wherein the carbon coating is pyrolytic carbon coating or diamond-like carbon coating or a composite coating of the pyrolytic carbon coating and the diamond-like carbon coating. The carbon fiber/carbon composite material matrix is composed of carbon fiber fabrics in a braided structure, a carbon matrix between the surface of the carbon fiber and the carbon fiber, and the mass ratio of the carbon fiber fabrics to the carbon matrix is about 7: 3.
Claims (8)
1. The utility model provides a carbon fiber/carbon composite C shape artificial trachea support which characterized in that: the tracheal stent is composed of a single C-shaped tracheal stent unit or at least two C-shaped tracheal stent units which are combined side by side; the main body of the C-shaped tracheal stent unit is of a U-shaped or pear-shaped belt-shaped structure; the C-shaped tracheal stent unit is composed of a carbon fiber/carbon composite material matrix and a carbon coating on the surface of the carbon fiber/carbon composite material matrix.
2. The carbon fiber/carbon composite C-shaped artificial trachea stent as claimed in claim 1, wherein: the thickness of the belt-shaped structure is 0.5 mm-2.0 mm, and the width of the belt-shaped structure is 3 mm-10 mm.
3. The carbon fiber/carbon composite C-shaped artificial trachea stent as claimed in claim 1, wherein: the wall of the belt-shaped structure is provided with a fixing hole, and two ends of the wall are provided with or without lugs.
4. The carbon fiber/carbon composite C-shaped artificial trachea stent as claimed in claim 3, wherein: the aperture size of the fixed hole is 0.5 mm-2.0 mm.
5. The carbon fiber/carbon composite C-shaped artificial trachea stent as claimed in claim 3, wherein: the carbon fiber/carbon composite material matrix is composed of carbon fiber fabrics and a carbon matrix inside the carbon fiber/carbon composite material matrix.
6. The carbon fiber/carbon composite C-shaped artificial trachea stent as claimed in claim 5, wherein: the carbon fiber fabric has a braided structure.
7. The carbon fiber/carbon composite C-shaped artificial trachea stent as claimed in claim 1, wherein: more than two C-shaped tracheal stent units are combined side by side according to the central axis of the C-shaped tracheal stent unit to form a hollow tubular structure with an axial notch on the side wall.
8. The carbon fiber/carbon composite C-shaped artificial trachea stent as claimed in claim 1, wherein: the carbon coating is a pyrolytic carbon coating or/and a diamond-like carbon coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022160719.5U CN213883678U (en) | 2020-09-28 | 2020-09-28 | Carbon fiber/carbon composite material C-shaped artificial trachea bracket |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022160719.5U CN213883678U (en) | 2020-09-28 | 2020-09-28 | Carbon fiber/carbon composite material C-shaped artificial trachea bracket |
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| CN213883678U true CN213883678U (en) | 2021-08-06 |
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| CN202022160719.5U Active CN213883678U (en) | 2020-09-28 | 2020-09-28 | Carbon fiber/carbon composite material C-shaped artificial trachea bracket |
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