Device and method for facilitating hemostasis of a biopsy tract
First Claim
1. A system for injecting a sponge into tissue, the system comprising:
- a pledget of sponge having a proximal end with a larger cross sectional area than a distal end;
a cannula for delivering the pledget in a hydrated state to the tissue; and
an adaptor connectable to the cannula for hydrating and delivering the pledget to the cannula, the adaptor having a tapered lumen with a large diameter proximal end and a small diameter distal end, wherein the small diameter distal end is connectable to the cannula.
3 Assignments
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Accused Products
Abstract
A system including an adaptor and a syringe is used for facilitating hemostasis of a biopsy tract or other puncture wound by delivery of an absorbable sponge in a hydrated state into the wound. The adaptor includes a tapered lumen for hydrating and compressing the relatively large absorbable sponge for delivery through a relatively small cannula, such as a biopsy needle. The hydrated absorbable sponge is injected through the biopsy needle into the biopsy tract by fluid. Alternatively, the sponge may be delivered to the biopsy needle by injection of fluid and then delivered to the biopsy tract by a plunger or stylet. The implanted absorbable sponge facilitates hemostasis at the biopsy site or other puncture wound and minimizes the chance of internal bleeding. The absorbable sponge material is absorbed by the body over time.
97 Citations
22 Claims
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1. A system for injecting a sponge into tissue, the system comprising:
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a pledget of sponge having a proximal end with a larger cross sectional area than a distal end; a cannula for delivering the pledget in a hydrated state to the tissue; and an adaptor connectable to the cannula for hydrating and delivering the pledget to the cannula, the adaptor having a tapered lumen with a large diameter proximal end and a small diameter distal end, wherein the small diameter distal end is connectable to the cannula. - View Dependent Claims (2, 3, 4, 5)
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6. A method of forming a sponge pledget for delivery to tissue, the method comprising:
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cutting a strip of sponge from a sheet of sponge material; and folding the strip to form a pledget with a first end having a first cross sectional area and a second folded end having a second cross sectional area which is larger than the first cross sectional area. - View Dependent Claims (7, 8, 9)
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10. A system for preparing and delivering a hydrated sponge to a cannula for delivery to tissue, the system comprising:
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an adaptor comprising; an elongated member having a first end, a second end, and a lumen extending from the first end to the second end; a luer connector provided at the second end for connection to a cannula; and a tapered section of the lumen tapering from a first diameter at the first end to a second diameter at the second end which is smaller than the first diameter such that a dry sponge pledget having a width larger than the second diameter is compressible when hydrated to allow passage of the pledget into the second diameter; and a template configured for use in cutting the sponge to a size to be received in the elongated member for delivery to the cannula. - View Dependent Claims (11, 12, 13)
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14. An adaptor system for delivering a hydrated sponge to a cannula for delivery to tissue, the system comprising:
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an elongated adaptor having a distal end, a proximal end, a lumen tapering from a larger diameter at a proximal end to a smaller diameter at the distal end, and a luer connection at the distal end; and a removable vent cap configured to engage the luer connection, the vent cap having a vent hole which allows fluid to pass out of the adaptor but prevents the sponge from passing through the vent hole. - View Dependent Claims (15, 16, 17, 18)
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19. A method of delivering a sponge into a tissue access tract comprising:
delivering a hydrated sponge pledget through a cannula positioned in a tissue access tract at a velocity E while withdrawing the cannula from the tissue at a velocity V to deposit the sponge pledget and seal the tissue access tract, wherein the velocity E is greater than or equal to the velocity V. - View Dependent Claims (20, 21, 22)
Specification