Chemical dispensing system

• US 5,681,289 A
• Filed: 08/14/1995
• Issued: 10/28/1997
• Est. Priority Date: 08/14/1995
• Status: Expired due to Fees

• Current Assignee: Innovasive Acquisition Corp.
• Original Assignee: Medicinelodge, Inc (Nelso Antolotti)
• Inventors: Goble, E. Marlowe, Chervitz, Alan, Wilcox, Todd
• Primary Examiner(s): Clarke, Robert A.
• Application Number:
  US08/514,953
• Time in Patent Office: 806 Days
• Field of Search: 604/93, 604/175, 604/131, 604/51, 623/22, 606/62, 606/67, 606/68, 606/92, 606/93, 606/95, 606/94
• US Class Current: 604/175
• CPC Class Codes: A61B 17/60 for external osteosynthesis, e.g. distractors, contractors
• CPC Class Codes: A61B 17/72 Intramedullary pins, nails or other devices A61B17/744 takes precedence
• CPC Class Codes: A61B 17/7216 for bone lengthening or compression A61B17/7258 takes precedence
• CPC Class Codes: A61B 17/7258 with laterally expanding parts, e.g. for gripping the bone
• CPC Class Codes: A61B 17/7283 with special cross-section of the nail
• CPC Class Codes: A61F 2/26 Penis implants
• CPC Class Codes: A61F 2/32 for the hip
• CPC Class Codes: A61F 2/3662 Femoral shafts
• CPC Class Codes: A61F 2/38 for elbows or knees
• CPC Class Codes: A61F 2002/30062 (bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
• CPC Class Codes: A61F 2002/30581 having a pocket filled with fluid, e.g. liquid
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30672 temporary
• CPC Class Codes: A61F 2002/30677 Means for introducing or releasing pharmaceutical products, e.g. antibiotics, into the body
• CPC Class Codes: A61F 2002/30787 inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/3401 with radial apertures, e.g. radial bores for receiving fixation screws
• CPC Class Codes: A61F 2002/3493 Spherical shell significantly greater than a hemisphere, e.g. extending over more than 200 degrees
• CPC Class Codes: A61F 2002/3611 Heads or epiphyseal parts of femur
• CPC Class Codes: A61F 2002/3631 with an integral complete or partial peripheral collar or bearing shoulder at its base
• CPC Class Codes: A61F 2002/368 with lateral apertures, bores, holes or openings, e.g. for reducing the mass, for receiving fixation screws or for communicating with the inside of a hollow shaft
• CPC Class Codes: A61F 2002/3694 : with longitudinal bores
• CPC Class Codes: A61F 2210/0004 : bioabsorbable
• CPC Class Codes: A61F 2250/0067 : Means for introducing or releasing pharmaceutical products into the body
• CPC Class Codes: A61M 39/0208 : Subcutaneous access sites for injecting or removing fluids transcutaneous access sites A61M39/0247; implantable infusion devices A61M5/14276

Abstract

A chemical dispensing system for dispensing a liquid chemical agent, such as an antibiotic, anesthetic, growth factor, hormone, anti=neoplastic agent, or the like, onto or into a site of a surgical procedure. The system includes at least one bladder having an internal cavity that connects to an open tube wherethrough the liquid chemical agent is passed, under pressure, into the bladder. The liquid chemical agent passes, as a low volume flow, through at least one hole formed through a bladder wall and onto the surgical procedure site. Embodiments of the invention include one or a pair of individual bladders formed from a thin flexible biocompatible material, each for positioning in close proximity to a prepared bone surface with a plurality of holes formed through the bladder surface that is in engagement with the prepared bone surface to bleed a low volume flow of a chemical agent onto the bone surface; a bladder for fitting into and to travel along a longitudinal passage of an intramedullary rod or nail to a location therealong that is adjacent to the surgical procedure site for delivering a volume of the liquid chemical agent onto that site; and a fixation device that includes at least one hollow pin for passing a volume of the liquid chemical agent therethrough directly into or onto a bone proximate to a fracture therein.

Claims

1. A chemical dispensing system to provide a low volume flow of a chemical agent to a surgical sit comprising, a bladder means that is a flexible tube having a cavity therein that is closed at a distal end and attached at its proximal end to one end of an open tube means, which said bladder means includes spaced holes formed through at least one flexible tube surface into said cavity that is of a diameter to pass a low volume flow of a chemical agent therethrough;

a means connected to said open tube to pass said low volume flow into said bladder means cavity; and

a pair of expanding collar means one maintained to a top and the other to a bottom section of said flexible tube;

each to expand into sealing engagement with a wall of a longitudinal passage formed through a shaft wherein said flexible tube is fitted.

2. A system as recited in claim 1, wherein the expanding collar means that is maintained to the bottom section of the flexible tube includes a tapered end.

3. A chemical dispensing system to provide a low volume flow of a chemical agent to a surgical sit comprising, a bladder means that is an intramedullary nail for fitting in a bone intramedullary canal to extend across a fracture therein and includes a hole means formed therein to be near to said bone fracture, that opens into a longitudinal passage of said intramedullary nail, which said longitudinal passage is closed at a distal end of said intramedullary nail that is attached, at its proximal end, to one end of an open tube means, which said hole means are open to pass a low volume flow of a chemical agent therethrough;

a means connected to said open tube to pass said low volume flow into intramedullary nail longitudinal passage.