USRE34037E - Support for biomedical implant device - Google Patents

Support for biomedical implant device Download PDF

Info

Publication number
USRE34037E
USRE34037E US07/642,582 US64258291A USRE34037E US RE34037 E USRE34037 E US RE34037E US 64258291 A US64258291 A US 64258291A US RE34037 E USRE34037 E US RE34037E
Authority
US
United States
Prior art keywords
implant device
biomedical implant
recited
cuff
drug
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.)
Expired - Lifetime
Application number
US07/642,582
Inventor
Masahide Inoue
Takeshi Ichitsuka
Yasuhiko Hirayama
Shozo Koshikawa
Tateki Kitaoka
Nobuo Nakabayashi
Tatsumichi Takeda
Osamu Minoo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Application granted granted Critical
Publication of USRE34037E publication Critical patent/USRE34037E/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L29/00—Materials for catheters, medical tubing, cannulae, or endoscopes or for coating catheters
    • A61L29/02—Inorganic materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/02—Inorganic materials
    • A61L27/12—Phosphorus-containing materials, e.g. apatite
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00179—Ceramics or ceramic-like structures
    • A61F2310/00293—Ceramics or ceramic-like structures containing a phosphorus-containing compound, e.g. apatite

Definitions

  • the present invention relates to a support for retaining biomedical implant devices such as a catheter for peritoneal dialysis, an extracorporeal shunt for hemodialysis, a tube for an ascites recirculation circuit, a drain tube, an air tube for an artificial heart, an electric circuit tube, and drug reservoir to be implanted under the skin.
  • biomedical implant devices such as a catheter for peritoneal dialysis, an extracorporeal shunt for hemodialysis, a tube for an ascites recirculation circuit, a drain tube, an air tube for an artificial heart, an electric circuit tube, and drug reservoir to be implanted under the skin.
  • the present invention relates to a support for such biomedical implant devices that manifests enhanced biocompatibility and which allows them to be retained in the body over a prolonged period without permitting bacterial ingress.
  • a cuff which is used with a catheter for peritoneal dialysis.
  • a catheter 1 is inserted through the skin 10 of the patient, the subcutaneous layer of fat 11, the fascia 12, the muscular tunic 13 and the peritoneum 14.
  • the catheter 1 is retained in the body so as to permit injection or discharging of a dialyzing solution through the catheter 1.
  • a cuff 2 attached to the catheter 1 is used as a support for functionally retaining the catheter 1 in the body over an extended period and is generally sutured in living tissues at the end of a surgical operation.
  • the cuff 2 is typically made of such materials as knitted or unknitted fabrics of synthetic or natural fibers, plastic or plastic film.
  • a reservoir 15 is implanted below the skin layer 10 and is composed of a drug cell 16. Holes 17 on projections guide a retaining thread (suture). The intended drug is injected into the cell 16 through a silicone or synthetic rubber wall 18.
  • a silicon tube 19 serves as a passage for introducing the drug into the affected site of part of the body such as a blood vessel or muscle. Stability of the retained reservoir 15 is required for a prolonged period in order to allow for periodic supply of the drug into the reservoir through the wall 18 with syringe.
  • a general object of the invention is to eliminate the above described problems in a biomedical implant device.
  • a particular object, therefore, of the present invention is to provide a support for biomedical implant device that affords enhanced adhesion to tissues and allows the implanted biomedical device to be retained stably in the body without permitting bacterial ingress.
  • Another object of the present invention is to provide a support which, in addition to the enhanced adhesion to surrounding tissues, permits the tissue to be anchored in the support, with subsequent increase in the stability of the support in the body.
  • a further object of the present invention is to provide a support possessed of increased strength and enhanced adhesion to the biomedical implant device.
  • a biomedical implant device having a support made of a biocompatible calcium phosphate compound as the material of the surface layer.
  • the calcium phosphate material may be porous, thereby allowing anchoring of the tissue.
  • the support is made in multiple layers.
  • the porous or solid support may have in its surface many recesses formed by etching, ion milling or other techniques.
  • FIG. 1 is a sketch of a conventional catheter with a cuff in the implanted state.
  • FIG. 2 is a sketch of a conventional drug reservoir in the subcutaneously implanted state.
  • FIGS. 3, 7, 8A and 8B and 9 are cross-sectional views of cuffs according to four embodiments of the present invention.
  • FIGS. 4 to 6 are pictorial representations of supports for biomedical implant device in the state where they adhere to surrounding tissues.
  • FIG. 10 is a sketch showing a cross section of the surface layer of a cuff according to a fifth embodiment of the present invention.
  • FIGS. 11A and 11B are a plan and a cross-sectional view, respectively, of a drug reservoir to be implanted under the skin according to a sixth embodiment of the present invention.
  • FIG. 3 shows a cuff 2 prepared in accordance with one embodiment of the present invention.
  • a catheter 1 made of a plastic or some other suitable material is connected to the cuff 2 that is formed of a biocompatible calcium phosphate material such as sintered hydroxyapatite, bioglass or sintered tricalcium phosphate (TCP).
  • the cuff 2 which is formed of sintered hydroxyapatite can be prepared from a hydroxyapatite powder by the following procedure.
  • a hydroxyapatite powder comprising irregularly shaped particles of 0.1-1 ⁇ m in average size is blended with a hydroxyapatite powder comprising spherical particles of 2-20 ⁇ m in average size.
  • the blend is intimately mixed with water and a blowing agent.
  • the mix is expanded and dried in a thermostatic dryer.
  • a suitable blowing agent is an aqueous solution of hydrogen peroxide or egg albumin.
  • the so prepared porous hydroxyapatite is machined into a cuff-shaped structure which is fired at a temperature of 1,000°-1,250° C. to produce the intended cuff 2.
  • the cuff has a porosity of 5-60%, preferably 20-40%, with the pore size being adjusted to 0.5-500 ⁇ m, preferably 5-200 ⁇ m.
  • the value of the porosity is determined by comparing the density of the solid material with that of the porous material. The percentage difference is the porosity and represents generally the volume percentage of voids.
  • the cuff 2 is then joined to a catheter 1 which is implanted in the body.
  • Such a cuff exhibits good biocompatibility while it is being gradually fused to surrounding tissues with time. Any bacterial ingress that might occur via the outer surface of the catheter is completely prevented at least by the cuff 2, with the result that the catheter 1 can be stably retained in the body over a prolonged period.
  • Adjustment of the porosity and pore size of the cuff to the above-specified values ensures spontaneous formation of small voids in its surface with the result that the effective surface area of the cuff 2 is sufficiently increased to provide enhanced adhesion to the surrounding tissues. If the porosity of the cuff is less than 5%, strong adhesion to the surrounding tissues is not attained. If the porosity exceeds 60%, the strength of the cuff 2 is drastically decreased. If the pore size of the cuff is less than 0.5 ⁇ m, tissue cells are unable to enter the cuff through voids. If the pore size exceeds 500 ⁇ m, the desired anchoring of tissues in the porous structure of the cuff cannot be attained.
  • FIGS. 4, 5 and 6 show that the adhesion between the cuff and surrounding tissues increases as the porosity of the cuff increases. As can be seen from the comparison of FIG. 4 (20% porosity), FIG. 5 (30% porosity) and FIG. 6 (56% porosity), strong adhesion is imparted by the tissues (colored portion) penetrating into the sintered hydroxy apatite (white portion).
  • FIGS. 7 shows a cuff according to a second embodiment of the present invention.
  • a catheter 1 is connected to a cuff 2.
  • the surface of the cuff 2 is provided with small projections 3 (5-1,000 ⁇ m in height) that are formed by cutting or some other machining technique.
  • the cuff 2 having such small projections 3 on its surface serve as a brake or impediment resisting movement when it is implanted in the body. Therefore, the cuff 2 with the projections 3 allows the catheter 1 to be securely fixed in the body right after it has been implanted by a surgical operation.
  • FIGS. 8A and 8B show a cuff according to a third embodiment of the present invention.
  • a catheter 1 is connected to a cuff 2 that is provided with holes 3 for facilitating post-operational suturing. Two variations of such a cuff 2 are shown in the two drawings.
  • FIG. 4 shows a cuff according to a fourth embodiment of the present invention.
  • a catheter 1 is connected to a cuff 2 that is composed of a surface-layer portion 4 and an inner-layer portion 5.
  • the surface-layer portion 4 is formed of a biocompatible calcium phosphate material having a comparatively high porosity.
  • the inner-layer portions 5 is formed of a biocompatible calcium phosphate material having a comparatively low porosity.
  • the inner-layer portion 6 may be formed on other materials such as titanium, alumina and plastics and, if plastic materials are used, greater facility is ensured when connecting the cuff 2 to the catheter 1.
  • the advantage of this fourth embodiment is that the inner-layer portion 6 imparts a greater strength to the cuff 2 so that the catheter 1 can be stably retained within the body.
  • FIG. 10 shows a cuff according to a fifth embodiment of the present invention.
  • a catheter 1 is connected to a cuff 2 that is prepared from sintered hydroxyapatite which is surface-treated by etching or ion milling to form recesses 7 in its surface having diameters of 0.5-500 ⁇ m.
  • the multiple recesses 7 help increase the surface area of the cuff 2 so as to provide further enhanced adhesion to surrounding tissues.
  • the concept of this embodiment is applicable not only to the case where the cuff 2 has a solid structure but also to the case where it is made of a porous structure.
  • the resulting cuff 2 provides not only good adhesion to surrounding tissues but also effective anchoring of the issue in the porous surface of the cuff 2, thereby ensuring greater stability of the catheter in the body.
  • FIGS. 11A and 11B shows a drug reservoir to be implanted under the skin according to a sixth embodiment of the present invention.
  • Components which are the same as those shown in FIG. 2 are identified by like numerals.
  • the reservoir 15 is surrounded by a casing 20 that has holes 17 for suturing.
  • the casing 20 is formed of a biocompatible calcium phosphate material. Any of the techniques employed in the above-described first to fifth embodiments is applicable to the casing 20 so that it will display sufficient biocompatibility and adhesion to the surrounding tissues to ensure that the reservoir 15 is stably retained in the body over a prolonged period.
  • the support for biomedical implant device of the present invention is made of a biocompatible calcium phosphate material either entirely or at least in the part which is to contact surrounding tissues when the device is implanted in the body.
  • the support has improved adhesion to the living tissues and allows the implanted biomedical device to be stably retained in the body without permitting bacterial ingress.

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Inorganic Chemistry (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Transplantation (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Medicinal Chemistry (AREA)
  • Dermatology (AREA)
  • Materials For Medical Uses (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Prostheses (AREA)

Abstract

A support for a biomedical implant device in which the support has a surface layer composed of a biocompatible calcium phosphate material such as sintered hydroxyapatite with a porosity of 50-60% and pore size of 0.5-500 micrometers. Preferably, the surface layer is formed with projections or recesses of a few hundred micrometers size.

Description

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a support for retaining biomedical implant devices such as a catheter for peritoneal dialysis, an extracorporeal shunt for hemodialysis, a tube for an ascites recirculation circuit, a drain tube, an air tube for an artificial heart, an electric circuit tube, and drug reservoir to be implanted under the skin. In particular, the present invention relates to a support for such biomedical implant devices that manifests enhanced biocompatibility and which allows them to be retained in the body over a prolonged period without permitting bacterial ingress.
2. Background of the Invention
An example of the support conventionally used to fix a biomedical implant device in the human body is a cuff which is used with a catheter for peritoneal dialysis. As shown in FIG. 1, a catheter 1 is inserted through the skin 10 of the patient, the subcutaneous layer of fat 11, the fascia 12, the muscular tunic 13 and the peritoneum 14. The catheter 1 is retained in the body so as to permit injection or discharging of a dialyzing solution through the catheter 1. In this case, a cuff 2 attached to the catheter 1 is used as a support for functionally retaining the catheter 1 in the body over an extended period and is generally sutured in living tissues at the end of a surgical operation. The cuff 2 is typically made of such materials as knitted or unknitted fabrics of synthetic or natural fibers, plastic or plastic film.
Another prior art biomedical implant device proposed to date is a drug reservoir for subcutaneous implantation. As shown in FIG. 2, a reservoir 15 is implanted below the skin layer 10 and is composed of a drug cell 16. Holes 17 on projections guide a retaining thread (suture). The intended drug is injected into the cell 16 through a silicone or synthetic rubber wall 18. A silicon tube 19 serves as a passage for introducing the drug into the affected site of part of the body such as a blood vessel or muscle. Stability of the retained reservoir 15 is required for a prolonged period in order to allow for periodic supply of the drug into the reservoir through the wall 18 with syringe.
Conventional supports such as cuffs that are formed of cellulosic or synthetic fibers, plastics, titanium or silicone resins show poor biocompatibility and poor adhesion to living tissues because of the nature of their constituent materials. As a result, during prolonged use of biomedical implant devices within the body, they might be displaced in position or bacterial ingress may occur in the gap between the device and the surrounding tissues.
SUMMARY OF THE INVENTION
A general object of the invention is to eliminate the above described problems in a biomedical implant device.
A particular object, therefore, of the present invention is to provide a support for biomedical implant device that affords enhanced adhesion to tissues and allows the implanted biomedical device to be retained stably in the body without permitting bacterial ingress.
Another object of the present invention is to provide a support which, in addition to the enhanced adhesion to surrounding tissues, permits the tissue to be anchored in the support, with subsequent increase in the stability of the support in the body.
A further object of the present invention is to provide a support possessed of increased strength and enhanced adhesion to the biomedical implant device.
These objects are achieved by a biomedical implant device having a support made of a biocompatible calcium phosphate compound as the material of the surface layer. The calcium phosphate material may be porous, thereby allowing anchoring of the tissue. To provide strength, the support is made in multiple layers. The porous or solid support may have in its surface many recesses formed by etching, ion milling or other techniques.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a sketch of a conventional catheter with a cuff in the implanted state.
FIG. 2 is a sketch of a conventional drug reservoir in the subcutaneously implanted state.
FIGS. 3, 7, 8A and 8B and 9 are cross-sectional views of cuffs according to four embodiments of the present invention.
FIGS. 4 to 6 are pictorial representations of supports for biomedical implant device in the state where they adhere to surrounding tissues.
FIG. 10 is a sketch showing a cross section of the surface layer of a cuff according to a fifth embodiment of the present invention.
FIGS. 11A and 11B are a plan and a cross-sectional view, respectively, of a drug reservoir to be implanted under the skin according to a sixth embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The support for biomedical implant device of the present invention is hereinafter described in detail. FIG. 3 shows a cuff 2 prepared in accordance with one embodiment of the present invention. A catheter 1 made of a plastic or some other suitable material is connected to the cuff 2 that is formed of a biocompatible calcium phosphate material such as sintered hydroxyapatite, bioglass or sintered tricalcium phosphate (TCP). The cuff 2 which is formed of sintered hydroxyapatite can be prepared from a hydroxyapatite powder by the following procedure. A hydroxyapatite powder comprising irregularly shaped particles of 0.1-1 μm in average size is blended with a hydroxyapatite powder comprising spherical particles of 2-20 μm in average size. The blend is intimately mixed with water and a blowing agent. The mix is expanded and dried in a thermostatic dryer. A suitable blowing agent is an aqueous solution of hydrogen peroxide or egg albumin.
The so prepared porous hydroxyapatite is machined into a cuff-shaped structure which is fired at a temperature of 1,000°-1,250° C. to produce the intended cuff 2. The cuff has a porosity of 5-60%, preferably 20-40%, with the pore size being adjusted to 0.5-500 μm, preferably 5-200 μm. The value of the porosity is determined by comparing the density of the solid material with that of the porous material. The percentage difference is the porosity and represents generally the volume percentage of voids. The cuff 2 is then joined to a catheter 1 which is implanted in the body. Such a cuff exhibits good biocompatibility while it is being gradually fused to surrounding tissues with time. Any bacterial ingress that might occur via the outer surface of the catheter is completely prevented at least by the cuff 2, with the result that the catheter 1 can be stably retained in the body over a prolonged period.
Adjustment of the porosity and pore size of the cuff to the above-specified values ensures spontaneous formation of small voids in its surface with the result that the effective surface area of the cuff 2 is sufficiently increased to provide enhanced adhesion to the surrounding tissues. If the porosity of the cuff is less than 5%, strong adhesion to the surrounding tissues is not attained. If the porosity exceeds 60%, the strength of the cuff 2 is drastically decreased. If the pore size of the cuff is less than 0.5 μm, tissue cells are unable to enter the cuff through voids. If the pore size exceeds 500 μm, the desired anchoring of tissues in the porous structure of the cuff cannot be attained.
FIGS. 4, 5 and 6 show that the adhesion between the cuff and surrounding tissues increases as the porosity of the cuff increases. As can be seen from the comparison of FIG. 4 (20% porosity), FIG. 5 (30% porosity) and FIG. 6 (56% porosity), strong adhesion is imparted by the tissues (colored portion) penetrating into the sintered hydroxy apatite (white portion).
FIGS. 7 shows a cuff according to a second embodiment of the present invention. A catheter 1 is connected to a cuff 2. The surface of the cuff 2 is provided with small projections 3 (5-1,000 μm in height) that are formed by cutting or some other machining technique. The cuff 2 having such small projections 3 on its surface serve as a brake or impediment resisting movement when it is implanted in the body. Therefore, the cuff 2 with the projections 3 allows the catheter 1 to be securely fixed in the body right after it has been implanted by a surgical operation.
FIGS. 8A and 8B show a cuff according to a third embodiment of the present invention. A catheter 1 is connected to a cuff 2 that is provided with holes 3 for facilitating post-operational suturing. Two variations of such a cuff 2 are shown in the two drawings.
FIG. 4 shows a cuff according to a fourth embodiment of the present invention. A catheter 1 is connected to a cuff 2 that is composed of a surface-layer portion 4 and an inner-layer portion 5. The surface-layer portion 4 is formed of a biocompatible calcium phosphate material having a comparatively high porosity. The inner-layer portions 5 is formed of a biocompatible calcium phosphate material having a comparatively low porosity. The inner-layer portion 6 may be formed on other materials such as titanium, alumina and plastics and, if plastic materials are used, greater facility is ensured when connecting the cuff 2 to the catheter 1. The advantage of this fourth embodiment is that the inner-layer portion 6 imparts a greater strength to the cuff 2 so that the catheter 1 can be stably retained within the body.
FIG. 10 shows a cuff according to a fifth embodiment of the present invention. A catheter 1 is connected to a cuff 2 that is prepared from sintered hydroxyapatite which is surface-treated by etching or ion milling to form recesses 7 in its surface having diameters of 0.5-500 μm. The multiple recesses 7 help increase the surface area of the cuff 2 so as to provide further enhanced adhesion to surrounding tissues. The concept of this embodiment is applicable not only to the case where the cuff 2 has a solid structure but also to the case where it is made of a porous structure. If recesses 7 are formed in the porous surface that has been attained by the sintering described above, the resulting cuff 2 provides not only good adhesion to surrounding tissues but also effective anchoring of the issue in the porous surface of the cuff 2, thereby ensuring greater stability of the catheter in the body.
FIGS. 11A and 11B shows a drug reservoir to be implanted under the skin according to a sixth embodiment of the present invention. Components which are the same as those shown in FIG. 2 are identified by like numerals. The reservoir 15 is surrounded by a casing 20 that has holes 17 for suturing. The casing 20 is formed of a biocompatible calcium phosphate material. Any of the techniques employed in the above-described first to fifth embodiments is applicable to the casing 20 so that it will display sufficient biocompatibility and adhesion to the surrounding tissues to ensure that the reservoir 15 is stably retained in the body over a prolonged period.
As described in the foregoing pages, the support for biomedical implant device of the present invention is made of a biocompatible calcium phosphate material either entirely or at least in the part which is to contact surrounding tissues when the device is implanted in the body. As a result, the support has improved adhesion to the living tissues and allows the implanted biomedical device to be stably retained in the body without permitting bacterial ingress.

Claims (19)

What is claimed is:
1. A biomedical implant device for implantation within tissue of a body, comprising: a support having a surface layer to be contacted with said tissue and composed of a biocompatible calcium phosphate material; and a medically operative part at least partially enclosed by said surface layer.
2. A biomedical implant device as recited in claim 1, wherein said calcium phosphate material is sintered hydroxyapatite.
3. A biomedical implant device as recited in claim 1, wherein said calcium phosphate material has a porosity of 5-60%.
4. A biomedical implant device as recited in claim 3 wherein said porosity is in a range of 20-40%.
5. A biomedical implant device as recited in claim 2, wherein said calcium phosphate material has a porosity of 5-60%.
6. A biomedical implant device as recited in claim 1, wherein said calcium phosphate material has a porosity of 5-60% and has voids with an average pore size of 0.5-500 micrometers.
7. A biomedical implant device as recited in claim 6, wherein said average pore size is 5-200 micrometers.
8. A biomedical implant device as recited in claim 2, wherein said calcium phosphate material has a porosity of 5-60% and has voids with an average pore size of 0.5-500 micrometers.
9. A biomedical implant device as recited in claim 8, wherein said average pore size is 5-200 micrometers.
10. A biomedical implant device as recited in claim 1, wherein said support further comprises at least one inner layer inside said surface layer of a material of greater strength than said surface layer.
11. A biomedical implant device as recited in claim 10, wherein said inner layer comprises sintered hydroxyapatite with a porosity significantly less than that of said surface layer.
12. A biomedical implant device as recited in claim 1, wherein said surface layer includes a plurality of surface projections having a average height of 5-1000 micrometers.
13. A biomedical implant device as recited in claim 5, wherein said surface layer includes a plurality of surface projections having heights of 5-1000 micrometers.
14. A biomedical implant device as recited in claim 1, wherein said surface layer includes a plurality of surface recesses having diameters of 0.5-500 micrometers.
15. A biomedical implant device as recited in claim 5, wherein said surface layer includes a plurality of surface recesses having diameters of 0.5-500 micrometers.
16. A biomedical implant device as recited in claim 1, wherein said medically operative part comprises a catheter and said support acts as a cuff surrounding said catheter.
17. A biomedical implant device as recited in claim 1, wherein said medically operative part comprises a drug reservoir and said support at least partially covers said drug reservoir. .Iadd.
18. A biomedical implant device for implantation within the tissues of a body, comprising; a support in the form of a cuff having a surface layer to be contacted with said tissues and composed of a biocompatible calcium phosphate material. .Iaddend. .Iadd.19. A biomedical implant device for implantation within the tissues of a body, comprising; a support having a surface layer to be contacted with said tissues and composed of a biocompatible calcium phosphate material, said support being in the form of a catheter cuff, said cuff including fixing means which, in use, operates to stably retain a catheter within the body. .Iaddend. .Iadd.20. A drug reservoir device for implantation within the body of a drug recipient, comprising; a drug reservoir, a casing formed of a biocompatible calcium phosphate material and substantially covering at least one surface of said reservoir and being in contact with tissues of the body in use, a drug entry location for receiving quantities of a drug to be delivered to the body, and a drug exit location through which said drug is supplied to the body. .Iaddend. .Iadd.21. A biomedical implant device for implantation within the tissues of a body, comprising; a support in the form of a catheter cuff having a surface layer to be contacted with said tissues and composed of a biocompatible calcium phosphate material. .Iaddend. .Iadd.22. A biomedical implant device for implantation within the tissues of a body, comprising; a support having a surface layer to be contacted with said tissues and composed of a biocompatible calcium phosphate material, said support being in the form of a cuff, said cuff including fixing means which, in use, operates to stably contact a member to be held in place in the body by said cuff. .Iaddend. .Iadd.23. A device as claimed in claim 22, wherein said fixing
means includes an interior surface of said cuff. .Iaddend. .Iadd.24. A drug reservoir device for implantation within the body of a drug recipient, comprising: a drug reservoir, a casing formed of a biocompatible calcium phosphate material and substantially covering a surface of said reservoir and being in contact with tissues of the body in use, a drug entry location for receiving quantities of a drug to be delivered to the body, and a drug exit location through which said drug is supplied to the body. .Iaddend.
US07/642,582 1986-06-06 1991-01-17 Support for biomedical implant device Expired - Lifetime USRE34037E (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP61-131570 1986-06-06
JP61131570A JPS6346171A (en) 1986-06-06 1986-06-06 Support of medical device stayed in living body

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US07/059,445 Reissue US4798585A (en) 1986-06-06 1987-06-08 Support for biomedical implant device

Publications (1)

Publication Number Publication Date
USRE34037E true USRE34037E (en) 1992-08-18

Family

ID=15061148

Family Applications (2)

Application Number Title Priority Date Filing Date
US07/059,445 Ceased US4798585A (en) 1986-06-06 1987-06-08 Support for biomedical implant device
US07/642,582 Expired - Lifetime USRE34037E (en) 1986-06-06 1991-01-17 Support for biomedical implant device

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US07/059,445 Ceased US4798585A (en) 1986-06-06 1987-06-08 Support for biomedical implant device

Country Status (6)

Country Link
US (2) US4798585A (en)
JP (1) JPS6346171A (en)
CA (1) CA1261699A (en)
DE (1) DE3718963A1 (en)
FR (1) FR2599627B1 (en)
GB (1) GB2194151B (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5308338A (en) * 1993-04-22 1994-05-03 Helfrich G Baird Catheter or the like with medication injector to prevent infection
US5643278A (en) * 1995-04-06 1997-07-01 Leocor, Inc. Stent delivery system
US5690643A (en) * 1996-02-20 1997-11-25 Leocor, Incorporated Stent delivery system
US5707387A (en) * 1996-03-25 1998-01-13 Wijay; Bandula Flexible stent
US5741293A (en) * 1995-11-28 1998-04-21 Wijay; Bandula Locking stent
US5824059A (en) * 1997-08-05 1998-10-20 Wijay; Bandula Flexible stent
US5984967A (en) 1995-03-27 1999-11-16 Sdgi Holdings, Inc. Osteogenic fusion devices
US6203569B1 (en) 1996-01-04 2001-03-20 Bandula Wijay Flexible stent
US6206922B1 (en) 1995-03-27 2001-03-27 Sdgi Holdings, Inc. Methods and instruments for interbody fusion
US6340366B2 (en) 1998-12-08 2002-01-22 Bandula Wijay Stent with nested or overlapping rings
US6478783B1 (en) 2000-05-26 2002-11-12 H. Robert Moorehead Anti-sludge medication ports and related methods
US6613091B1 (en) 1995-03-27 2003-09-02 Sdgi Holdings, Inc. Spinal fusion implants and tools for insertion and revision
US20040068228A1 (en) * 2002-10-04 2004-04-08 Jon Cunningham Device and method for stabilizing catheters
US20040244819A1 (en) * 2002-11-04 2004-12-09 Edelmann David Charles Systems and methods for controlling warewasher wash cycle duration, detecting water levels and priming warewasher chemical feed lines
US20080262406A1 (en) * 2007-04-23 2008-10-23 Edward Lee Wiener Securement device for shunt catheter and implantation method therefor

Families Citing this family (72)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6346171A (en) * 1986-06-06 1988-02-27 旭光学工業株式会社 Support of medical device stayed in living body
JP2683750B2 (en) * 1988-06-06 1997-12-03 住友電気工業株式会社 Catheter balloon
DE8808701U1 (en) * 1988-07-04 1989-08-03 Mecron Medizinische Produkte Gmbh, 1000 Berlin Endoprosthesis
US5176638A (en) * 1990-01-12 1993-01-05 Don Michael T Anthony Regional perfusion catheter with improved drug delivery control
US5314471A (en) * 1991-07-24 1994-05-24 Baxter International Inc. Tissue inplant systems and methods for sustaining viable high cell densities within a host
CA2070816A1 (en) * 1990-10-31 1992-05-01 James H. Brauker Close vascularization implant material
US5344454A (en) * 1991-07-24 1994-09-06 Baxter International Inc. Closed porous chambers for implanting tissue in a host
US5545223A (en) * 1990-10-31 1996-08-13 Baxter International, Inc. Ported tissue implant systems and methods of using same
US5713888A (en) * 1990-10-31 1998-02-03 Baxter International, Inc. Tissue implant systems
US6773458B1 (en) 1991-07-24 2004-08-10 Baxter International Inc. Angiogenic tissue implant systems and methods
US5453278A (en) * 1991-07-24 1995-09-26 Baxter International Inc. Laminated barriers for tissue implants
US5366504A (en) * 1992-05-20 1994-11-22 Boston Scientific Corporation Tubular medical prosthesis
US5534031A (en) * 1992-01-28 1996-07-09 Asahi Kogaku Kogyo Kabushiki Kaisha Prosthesis for spanning a space formed upon removal of an intervertebral disk
US6001103A (en) * 1992-03-10 1999-12-14 Asahi Kogaku Kogyo Kabushiki Kaisha Bone connector
JP3311022B2 (en) * 1992-03-10 2002-08-05 旭光学工業株式会社 Osteosynthesis material
US5645596A (en) * 1993-07-07 1997-07-08 Asahi Kogaku Kogyo Kabushiki Kaisha Ceramic vertebrae prosthesis
JPH08503715A (en) * 1993-09-24 1996-04-23 バクスター、インターナショナル、インコーポレイテッド Method for promoting vascularization of implantable devices
US6156305A (en) * 1994-07-08 2000-12-05 Baxter International Inc. Implanted tumor cells for the prevention and treatment of cancer
JP3689146B2 (en) * 1995-05-30 2005-08-31 ペンタックス株式会社 Elements for screw fixation to bone
US5830539A (en) * 1995-11-17 1998-11-03 The State Of Oregon Acting By And Through The State Board Of Higher Education On Behalf Of The University Of Oregon Methods for functionalizing and coating substrates and devices made according to the methods
US5848987A (en) * 1996-04-30 1998-12-15 Medtronic, Inc. Microtextured catheter and method for preventing catheter fluid reflux
JP3679570B2 (en) 1997-03-14 2005-08-03 ペンタックス株式会社 Bone prosthetic material and manufacturing method thereof
EP0975285B1 (en) * 1997-04-01 2008-10-01 CAP Biotechnology, Inc. Calcium phosphate microcarriers and microspheres
CA2377747C (en) 1999-07-08 2009-09-29 Cap Biotechnology, Inc. Calcium-containing structures and methods of making and using the same
GB2366738B (en) * 2000-03-10 2004-03-03 Technology Finance Corp Implant including a body of non-resorbable bioactive material
US8251986B2 (en) 2000-08-17 2012-08-28 Angiodynamics, Inc. Method of destroying tissue cells by eletroporation
JP4070951B2 (en) * 2000-12-07 2008-04-02 ペンタックス株式会社 Method for producing porous calcium phosphate ceramic sintered body
US6949251B2 (en) * 2001-03-02 2005-09-27 Stryker Corporation Porous β-tricalcium phosphate granules for regeneration of bone tissue
US6695920B1 (en) * 2001-06-27 2004-02-24 Advanced Cardiovascular Systems, Inc. Mandrel for supporting a stent and a method of using the mandrel to coat a stent
US6673154B1 (en) * 2001-06-28 2004-01-06 Advanced Cardiovascular Systems, Inc. Stent mounting device to coat a stent
US6994706B2 (en) 2001-08-13 2006-02-07 Minnesota Medical Physics, Llc Apparatus and method for treatment of benign prostatic hyperplasia
US7074276B1 (en) * 2002-12-12 2006-07-11 Advanced Cardiovascular Systems, Inc. Clamp mandrel fixture and a method of using the same to minimize coating defects
US7622070B2 (en) * 2005-06-20 2009-11-24 Advanced Cardiovascular Systems, Inc. Method of manufacturing an implantable polymeric medical device
US7823533B2 (en) * 2005-06-30 2010-11-02 Advanced Cardiovascular Systems, Inc. Stent fixture and method for reducing coating defects
US7735449B1 (en) 2005-07-28 2010-06-15 Advanced Cardiovascular Systems, Inc. Stent fixture having rounded support structures and method for use thereof
US7867547B2 (en) 2005-12-19 2011-01-11 Advanced Cardiovascular Systems, Inc. Selectively coating luminal surfaces of stents
US8003156B2 (en) 2006-05-04 2011-08-23 Advanced Cardiovascular Systems, Inc. Rotatable support elements for stents
US7985441B1 (en) 2006-05-04 2011-07-26 Yiwen Tang Purification of polymers for coating applications
WO2009124201A2 (en) * 2008-04-02 2009-10-08 Pioneer Surgical Technology, Inc Intervertebral implant devices for supporting vertebrae and devices and methods for insertion thereof
US9283051B2 (en) 2008-04-29 2016-03-15 Virginia Tech Intellectual Properties, Inc. System and method for estimating a treatment volume for administering electrical-energy based therapies
US9867652B2 (en) 2008-04-29 2018-01-16 Virginia Tech Intellectual Properties, Inc. Irreversible electroporation using tissue vasculature to treat aberrant cell masses or create tissue scaffolds
US11272979B2 (en) 2008-04-29 2022-03-15 Virginia Tech Intellectual Properties, Inc. System and method for estimating tissue heating of a target ablation zone for electrical-energy based therapies
US10272178B2 (en) 2008-04-29 2019-04-30 Virginia Tech Intellectual Properties Inc. Methods for blood-brain barrier disruption using electrical energy
US10702326B2 (en) 2011-07-15 2020-07-07 Virginia Tech Intellectual Properties, Inc. Device and method for electroporation based treatment of stenosis of a tubular body part
US9598691B2 (en) 2008-04-29 2017-03-21 Virginia Tech Intellectual Properties, Inc. Irreversible electroporation to create tissue scaffolds
US10117707B2 (en) 2008-04-29 2018-11-06 Virginia Tech Intellectual Properties, Inc. System and method for estimating tissue heating of a target ablation zone for electrical-energy based therapies
US10238447B2 (en) 2008-04-29 2019-03-26 Virginia Tech Intellectual Properties, Inc. System and method for ablating a tissue site by electroporation with real-time monitoring of treatment progress
US8992517B2 (en) 2008-04-29 2015-03-31 Virginia Tech Intellectual Properties Inc. Irreversible electroporation to treat aberrant cell masses
US9198733B2 (en) 2008-04-29 2015-12-01 Virginia Tech Intellectual Properties, Inc. Treatment planning for electroporation-based therapies
US11254926B2 (en) 2008-04-29 2022-02-22 Virginia Tech Intellectual Properties, Inc. Devices and methods for high frequency electroporation
US10245098B2 (en) 2008-04-29 2019-04-02 Virginia Tech Intellectual Properties, Inc. Acute blood-brain barrier disruption using electrical energy based therapy
US11638603B2 (en) 2009-04-09 2023-05-02 Virginia Tech Intellectual Properties, Inc. Selective modulation of intracellular effects of cells using pulsed electric fields
US11382681B2 (en) 2009-04-09 2022-07-12 Virginia Tech Intellectual Properties, Inc. Device and methods for delivery of high frequency electrical pulses for non-thermal ablation
US8903488B2 (en) 2009-05-28 2014-12-02 Angiodynamics, Inc. System and method for synchronizing energy delivery to the cardiac rhythm
US9895189B2 (en) 2009-06-19 2018-02-20 Angiodynamics, Inc. Methods of sterilization and treating infection using irreversible electroporation
US8425455B2 (en) 2010-03-30 2013-04-23 Angiodynamics, Inc. Bronchial catheter and method of use
EP2569342B1 (en) 2010-05-11 2022-01-26 Howmedica Osteonics Corp. Organophosphorous, multivalent metal compounds,&polymer adhesive interpenetrating network compositions&methods
US9700368B2 (en) 2010-10-13 2017-07-11 Angiodynamics, Inc. System and method for electrically ablating tissue of a patient
WO2012088149A2 (en) 2010-12-20 2012-06-28 Virginia Tech Intellectual Properties, Inc. High-frequency electroporation for cancer therapy
WO2012158527A2 (en) 2011-05-13 2012-11-22 Howmedica Osteonics Organophosphorous & multivalent metal compound compositions & methods
US9078665B2 (en) 2011-09-28 2015-07-14 Angiodynamics, Inc. Multiple treatment zone ablation probe
US9414881B2 (en) 2012-02-08 2016-08-16 Angiodynamics, Inc. System and method for increasing a target zone for electrical ablation
CN112807074A (en) 2014-05-12 2021-05-18 弗吉尼亚暨州立大学知识产权公司 Electroporation system
US12114911B2 (en) 2014-08-28 2024-10-15 Angiodynamics, Inc. System and method for ablating a tissue site by electroporation with real-time pulse monitoring
US10694972B2 (en) 2014-12-15 2020-06-30 Virginia Tech Intellectual Properties, Inc. Devices, systems, and methods for real-time monitoring of electrophysical effects during tissue treatment
US10905492B2 (en) 2016-11-17 2021-02-02 Angiodynamics, Inc. Techniques for irreversible electroporation using a single-pole tine-style internal device communicating with an external surface electrode
US11147682B2 (en) 2017-09-08 2021-10-19 Pioneer Surgical Technology, Inc. Intervertebral implants, instruments, and methods
USD907771S1 (en) 2017-10-09 2021-01-12 Pioneer Surgical Technology, Inc. Intervertebral implant
US11607537B2 (en) 2017-12-05 2023-03-21 Virginia Tech Intellectual Properties, Inc. Method for treating neurological disorders, including tumors, with electroporation
US11311329B2 (en) 2018-03-13 2022-04-26 Virginia Tech Intellectual Properties, Inc. Treatment planning for immunotherapy based treatments using non-thermal ablation techniques
US11925405B2 (en) 2018-03-13 2024-03-12 Virginia Tech Intellectual Properties, Inc. Treatment planning system for immunotherapy enhancement via non-thermal ablation
US11950835B2 (en) 2019-06-28 2024-04-09 Virginia Tech Intellectual Properties, Inc. Cycled pulsing to mitigate thermal damage for multi-electrode irreversible electroporation therapy

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3673612A (en) * 1970-08-28 1972-07-04 Massachusetts Inst Technology Non-thrombogenic materials and methods for their preparation
US3752162A (en) * 1972-04-10 1973-08-14 Dow Corning Artificial cutaneous stoma
US4479796A (en) * 1982-11-15 1984-10-30 Medtronic, Inc. Self-regenerating drug administration device
US4543088A (en) * 1983-11-07 1985-09-24 American Hospital Supply Corporation Self-sealing subcutaneous injection site
US4610692A (en) * 1981-02-20 1986-09-09 Mundipharma Gmbh Implant for filling bone cavities and fixing bone fragments in a living body, method of producing the same, and bone implant system
US4632670A (en) * 1985-04-04 1986-12-30 Argon Medical Corp. Suture tab
US4798585A (en) * 1986-06-06 1989-01-17 Asahi Kogaku Kogyo Kabushiki Kaisha Support for biomedical implant device

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4073999A (en) * 1975-05-09 1978-02-14 Minnesota Mining And Manufacturing Company Porous ceramic or metallic coatings and articles
JPS5839533B2 (en) * 1975-12-30 1983-08-30 住友化学工業株式会社 Implant noseizouhouhou
DE2807132C2 (en) * 1978-02-20 1983-11-03 Battelle-Institut E.V., 6000 Frankfurt Implantable pharmaceutical depot
DE2827529C2 (en) * 1978-06-23 1982-09-30 Battelle-Institut E.V., 6000 Frankfurt Implantable bone replacement material consisting of a metal core and bioactive, sintered calcium phosphate ceramic particles and a process for its production
CA1247960A (en) * 1983-03-24 1989-01-03 Hideki Aoki Transcutaneously implantable element
DE3316801A1 (en) * 1983-05-07 1984-11-08 Friedrichsfeld Gmbh, Steinzeug- Und Kunststoffwerke, 6800 Mannheim SEMI-IMPLANT
FR2548011B2 (en) * 1983-07-01 1985-12-13 Europ Propulsion PROCESS FOR MAKING BIOACTIVE DEPOSITS OF CALCIUM PHOSPHATES AND PRODUCTS OBTAINED
FR2561922B1 (en) * 1984-04-02 1987-04-30 Biomasys DEVICE FOR ATRAUMATIC ACCESS TO THE BLOOD CIRCUIT
US4863475A (en) * 1984-08-31 1989-09-05 Zimmer, Inc. Implant and method for production thereof
US4629464A (en) * 1984-09-25 1986-12-16 Tdk Corporation Porous hydroxyapatite material for artificial bone substitute
DE3447583A1 (en) * 1984-12-28 1986-07-10 Battelle-Institut E.V., 6000 Frankfurt METHOD FOR PRODUCING IMPLANTABLE BONE REPLACEMENT MATERIALS
US4645504A (en) * 1985-05-24 1987-02-24 The Regents Of The University Of California Implantable infection barrier seal and method
DD246476A1 (en) * 1986-03-12 1987-06-10 Karl Marx Stadt Tech Hochschul ONE-PIECE CEMENT-FREE ANCHORABLE BIOKOMPATIBLE HIP JOINT PAN

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3673612A (en) * 1970-08-28 1972-07-04 Massachusetts Inst Technology Non-thrombogenic materials and methods for their preparation
US3752162A (en) * 1972-04-10 1973-08-14 Dow Corning Artificial cutaneous stoma
US4610692A (en) * 1981-02-20 1986-09-09 Mundipharma Gmbh Implant for filling bone cavities and fixing bone fragments in a living body, method of producing the same, and bone implant system
US4479796A (en) * 1982-11-15 1984-10-30 Medtronic, Inc. Self-regenerating drug administration device
US4543088A (en) * 1983-11-07 1985-09-24 American Hospital Supply Corporation Self-sealing subcutaneous injection site
US4632670A (en) * 1985-04-04 1986-12-30 Argon Medical Corp. Suture tab
US4798585A (en) * 1986-06-06 1989-01-17 Asahi Kogaku Kogyo Kabushiki Kaisha Support for biomedical implant device

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5308338A (en) * 1993-04-22 1994-05-03 Helfrich G Baird Catheter or the like with medication injector to prevent infection
US6613091B1 (en) 1995-03-27 2003-09-02 Sdgi Holdings, Inc. Spinal fusion implants and tools for insertion and revision
US6206922B1 (en) 1995-03-27 2001-03-27 Sdgi Holdings, Inc. Methods and instruments for interbody fusion
US6695851B2 (en) 1995-03-27 2004-02-24 Sdgi Holdings, Inc. Methods and instruments for interbody fusion
US6471724B2 (en) 1995-03-27 2002-10-29 Sdgi Holdings, Inc. Methods and instruments for interbody fusion
US7621958B2 (en) 1995-03-27 2009-11-24 Warsaw Orthopedic, Inc. Methods and instruments for interbody fusion
US5984967A (en) 1995-03-27 1999-11-16 Sdgi Holdings, Inc. Osteogenic fusion devices
US20090043394A1 (en) * 1995-03-27 2009-02-12 Thomas Zdeblick Spinal fusion implants and tools for insertion and revision
US20040097928A1 (en) * 1995-03-27 2004-05-20 Thomas Zdeblick Interbody fusion device and method for restoration of normal spinal anatomy
US7238186B2 (en) 1995-03-27 2007-07-03 Warsaw Orthopedic, Inc. Interbody fusion device and method for restoration of normal spinal anatomy
US6645206B1 (en) 1995-03-27 2003-11-11 Sdgi Holdings, Inc. Interbody fusion device and method for restoration of normal spinal anatomy
US20050192669A1 (en) * 1995-03-27 2005-09-01 Thomas Zdeblick Spinal fusion implants and tools for insertion and revision
US7985258B2 (en) 1995-03-27 2011-07-26 Warsaw Orthopedic Inc. Methods and instruments for interbody fusion
US5643278A (en) * 1995-04-06 1997-07-01 Leocor, Inc. Stent delivery system
US5741293A (en) * 1995-11-28 1998-04-21 Wijay; Bandula Locking stent
US6203569B1 (en) 1996-01-04 2001-03-20 Bandula Wijay Flexible stent
US5690643A (en) * 1996-02-20 1997-11-25 Leocor, Incorporated Stent delivery system
US5707387A (en) * 1996-03-25 1998-01-13 Wijay; Bandula Flexible stent
US5824059A (en) * 1997-08-05 1998-10-20 Wijay; Bandula Flexible stent
US6340366B2 (en) 1998-12-08 2002-01-22 Bandula Wijay Stent with nested or overlapping rings
US6478783B1 (en) 2000-05-26 2002-11-12 H. Robert Moorehead Anti-sludge medication ports and related methods
US20040068228A1 (en) * 2002-10-04 2004-04-08 Jon Cunningham Device and method for stabilizing catheters
US20040244819A1 (en) * 2002-11-04 2004-12-09 Edelmann David Charles Systems and methods for controlling warewasher wash cycle duration, detecting water levels and priming warewasher chemical feed lines
US20080262406A1 (en) * 2007-04-23 2008-10-23 Edward Lee Wiener Securement device for shunt catheter and implantation method therefor

Also Published As

Publication number Publication date
GB8713181D0 (en) 1987-07-08
DE3718963A1 (en) 1987-12-10
FR2599627A1 (en) 1987-12-11
CA1261699A (en) 1989-09-26
GB2194151B (en) 1991-01-30
US4798585A (en) 1989-01-17
FR2599627B1 (en) 1992-09-04
JPS6346171A (en) 1988-02-27
DE3718963C2 (en) 1991-05-29
GB2194151A (en) 1988-03-02

Similar Documents

Publication Publication Date Title
USRE34037E (en) Support for biomedical implant device
US4919666A (en) Implant having recesses for therapeutically effective substances
US4668222A (en) Percutaneous access device with removable tube
JP2735795B2 (en) Endoprosthesis
CA1144705A (en) Implant device
US20070270691A1 (en) Radiopaque compositions, articles and methods of making and using same
DE59307482D1 (en) Endoprosthesis implantable percutaneously in the body of a patient
JP2002523177A (en) Transmyocardial implant
US5466259A (en) Orbital implant and method
Paquay et al. Tissue reaction to Dacron® velour and titanium fibre mesh used for anchorage of percutaneous devices
DE59510781D1 (en) Endoprosthesis implantable percutaneously in a patient's body
GB2050175A (en) Atraumatic valving mechanisms
KR102289803B1 (en) Two-Part Implantable Therapeutic Delivery Device
US4713073A (en) Plastic implant
EP0351424A1 (en) Articles for tissue contact containing an antimicrobial agent
EP0367354B1 (en) A percutaneous implant
US5713955A (en) Orbital implant
CA1118155A (en) Implant device of bio-compatible carbon substrate coated with collagen
JP2012501228A (en) Drug delivery implants
GB2142828A (en) Sealing mechanism for blood access device
WO2002074192A2 (en) Methods and devices for occluding myocardial holes
Suvaneeth et al. Biomaterials and biocompatibility
EP0343114B1 (en) Transcutaneous device
Metzger Polyethylene terephthalate and the pillar™ palatal implant: its historical usage and durability in medical applications
JP2635436B2 (en) Artificial bone composite for chest wall reconstruction

Legal Events

Date Code Title Description
FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

FEPP Fee payment procedure

Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 8

FEPP Fee payment procedure

Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 12