IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0094233
(2011-04-26)
|
등록번호 |
US-8454603
(2013-06-04)
|
발명자
/ 주소 |
- Webb, Lawrence X.
- Argenta, Louis C.
- Morykwas, Michael J.
|
출원인 / 주소 |
- Wake Forest University Health Sciences
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
10 인용 특허 :
425 |
초록
▼
An external fixation assembly includes a plurality of hollow pins that are inserted into a patient's bone. Each pin has an interior bore and a plurality of apertures extending through the pin wall from the bore. The pin may be coupled to a source of vacuum pressure operable to create reduced pressur
An external fixation assembly includes a plurality of hollow pins that are inserted into a patient's bone. Each pin has an interior bore and a plurality of apertures extending through the pin wall from the bore. The pin may be coupled to a source of vacuum pressure operable to create reduced pressure in the tissue surrounding the pin. A cover is placed around the pin and sealed to provide a fluid-tight enclosure that maintains reduced pressure around the pin. A method for applying external fixation using the fixator pins described above includes the steps of inserting each pin through a skin opening, positioning the pin apertures near selected tissue, covering the skin opening with a sealed enclosure, connecting the pins to a source of vacuum pressure, and activating the source of vacuum pressure to create reduced pressure in the patient's tissue at or near the bone.
대표청구항
▼
1. A fixation device comprising: a. a fixator pin having a hollow shaft that extends along a longitudinal axis of the fixator pin, the fixator pin comprising a threaded section and a non-threaded section, the threaded section configured to be screwed into bone;b. a cover disposed about the fixator p
1. A fixation device comprising: a. a fixator pin having a hollow shaft that extends along a longitudinal axis of the fixator pin, the fixator pin comprising a threaded section and a non-threaded section, the threaded section configured to be screwed into bone;b. a cover disposed about the fixator pin and sealed to the fixator pin to provide an enclosure configured to maintain negative pressure beneath the cover;c. at least one aperture in the fixator pin that extends through a side wall of the pin in fluid communication with the hollow shaft, the at least one aperture disposed beneath the cover in fluid communication with the enclosure; andd. a vacuum source in fluid communication with the hollow shaft, the vacuum source adapted to provide and maintain negative pressure through the at least one aperture to the enclosure beneath the cover. 2. The fixation device of claim 1, wherein the at least one aperture is provided in the non-threaded section of the fixator pin. 3. The fixation device of claim 1, wherein the at least one aperture is a plurality of apertures. 4. The fixation device of claim 1, wherein the fixator pin comprises a proximal end, connected to the vacuum source, and a distal end comprising the threaded section. 5. The fixation device of claim 1, comprising a detachable shaft section to provide an implant that may be left in a bone. 6. The fixation device of claim 5, wherein the detachable shaft section comprises a bone substitute material. 7. The fixation device of claim 6, wherein the bone substitute material comprises an osteoconductive material, osteoinductive material, or combinations thereof. 8. The fixation device of claim 6, wherein the bone substitute material comprises a bioglass, a ceramic material, calcium sulfate, calcium phosphate, hydroxyapatite, fluoroapatite, tri-calcium phosphate, bioglass ceramics, or combinations thereof. 9. The fixation device of claim 1, wherein the fixator pin comprises a bone substitute material. 10. The fixation device of claim 9, wherein the bone substitute comprises an osteoconductive material, an osteoinductive material, or combinations thereof. 11. The fixation device of claim 9, wherein the bone substitute comprises a bioglass, a ceramic material, calcium sulfate, calcium phosphate, hydroxyapatite, fluoroapatite, tri-calcium phosphate, bioglass ceramics, or combinations thereof. 12. The fixation device of claim 1, comprising a guide pin for introduction into a bone, and wherein the hollow shaft of the fixator pin is dimensioned to permit the guide pin to be inserted into the hollow shaft. 13. The fixation device of claim 1, comprising: a. a reduced pressure distribution element disposed around the fixator pin and beneath the cover; andb. a flexible tube in fluid communication with the hollow shaft and adapted to provide negative pressure from the vacuum source to the hollow shaft. 14. The fixation device of claim 13, wherein the at least one aperture is provided in the non-threaded section of the fixator pin. 15. The fixation device of claim 13, wherein the at least one aperture is a plurality of apertures. 16. The fixation device of claim 13, wherein the fixator pin comprises a proximal end, connected to the vacuum source and a distal end comprising the threaded section. 17. The fixation device of claim 13, wherein the reduced pressure distribution element comprises an open-cell foam. 18. The fixation device of claim 13, comprising a detachable shaft section to provide an implant that may be left in a bone. 19. The fixation device of claim 18, wherein the detachable shaft section comprises a bone substitute material. 20. The fixation device of claim 19, wherein the bone substitute material comprises an osteoconductive material, osteoinductive material, or combinations thereof. 21. The fixation device of claim 19, wherein the bone substitute material comprises a bioglass, a ceramic material, calcium sulfate, calcium phosphate, hydroxyapatite, fluoroapatite, tri-calcium phosphate, bioglass ceramics, or combinations thereof. 22. The fixation device of claim 13, wherein the fixator pin comprises a bone substitute material. 23. The fixation device of claim 22, wherein the bone substitute material comprises an osteoconductive material, osteoinductive material, or combinations thereof. 24. The fixation device of claim 22, wherein the bone substitute material comprises a bioglass, a ceramic material, calcium sulfate, calcium phosphate, hydroxyapatite, fluoroapatite, tri-calcium phosphate, bioglass ceramics, or combinations thereof. 25. The fixation device of claim 13, comprising a guide pin for introduction into a bone, and wherein the hollow shaft of the fixator pin is dimensioned to permit the guide pin to be inserted into the hollow shaft.
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