Device for priming for improved adherence of gels to substrates
First Claim
1. A combination device for conducting a primed photopolymerization treatment in a biological or medical setting comprising:
- a shaft having a proximal end to be held by a person administering the treatment and a distal end from which one or more fluids are dispensed;
a first conduit fluidly connectable to a first reservoir containing a photoinitiator and fluidly connected to the distal end of the shaft;
a second conduit fluidly connectable to a second reservoir containing a monomer solution and fluidly connected to the distal end of the shaft; and
near the distal end of the shaft, a source of electromagnetic radiation of a wavelength that causes activation of the photoinitiator.
4 Assignments
0 Petitions
Accused Products
Abstract
An improved barrier or drug delivery system which is highly adherent to the surface to which it is applied is disclosed, along with methods for making the barrier. In the preferred embodiment, tissue is stained with a photoinitiator, then the polymer solution or gel having added thereto a defined amount of the same or a different photoinitator is applied to the tissue. On exposure to light, the resulting system polymerizes at the surface, giving excellent adherence, and also forms a gel in the rest of the applied volume. Thus a gel barrier of arbitrary thickness can be applied to a surface while maintaining high adherence at the interface. This process is referred to herein as "priming". The polymerizable barrier materials are highly useful for sealing tissue surfaces and junctions against leaks of fluids. In another embodiment, "priming" can be used to reliably adhere preformed barriers to tissue or other surfaces, or to adhere tissue surfaces to each other. A first surface and a barrier, or another surface, are prestained with initiator, and a thin layer of gellable monomer containing initiator is placed between them. Strong adhesion is obtained between the two surfaces on gelation of the monomer. In a similar fashion, tissue surfaces can be adhered to each other in repair of wounds and formation of anastomoses. Methods for use of non-photochemical systems and combined chemical/photochemical systems are described.
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Citations
29 Claims
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1. A combination device for conducting a primed photopolymerization treatment in a biological or medical setting comprising:
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a shaft having a proximal end to be held by a person administering the treatment and a distal end from which one or more fluids are dispensed; a first conduit fluidly connectable to a first reservoir containing a photoinitiator and fluidly connected to the distal end of the shaft; a second conduit fluidly connectable to a second reservoir containing a monomer solution and fluidly connected to the distal end of the shaft; and near the distal end of the shaft, a source of electromagnetic radiation of a wavelength that causes activation of the photoinitiator. - View Dependent Claims (2, 3, 4, 5, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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- 6. A device as in claim 1l further comprising a first dispenser associated with a first reservoir containing a photoinitiator and a second dispenser associated with a second reservoir containing a monomer solution and a lever near the proximal end of the shaft-coupled to an actuator switchable between a first position in which the lever is operably linkable to the first dispenser and a second position in which the lever is operably linkable to the second dispenser.
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20. A combination device for conducting a primed photopolymerization treatment in a biological or medical setting comprising:
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a shaft having a proximal end to be held by a person administering the treatment and a distal end from which one or more fluids are dispensed; a first composition reservoir, including a dispenser, connected to a first conduit and a second composition reservoirs, including a dispenser, connected to a second conduit, the composition reservoirs each containing a primer, a monomer solution, or a combination thereof, and the conduits each fluidly connected to the distal end of the shaft; a lever at the proximal end of the shaft movable between a first position and a second position; a composition dispensing mechanism having a first position operably linking the first composition reservoir dispenser with the lever and a second position operably linking the second composition reservoir dispenser with the lever; means for selection among the first position of the dispensing mechanism and the second position of the dispensing mechanism, wherein the lever, when moved from its first position to its second position, dispenses contents of the composition reservoir with which it is operably linked via the dispensing mechanism, whereby the contents of the first and second composition reservoirs are dispensable independently from the distal end from the shaft; and a source of electromagnetic radiation near the distal end of the shaft. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification