High viscosity antibacterials
First Claim
1. A transparent, antibacterial formulation which comprises an alcohol mixed with sufficient viscosity increasing agent to provide a viscosity of more than 150,000 up to about to 500,000 cp, to the formulation, and further comprising an alcohol-soluble surfactant that improves transparency.
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Accused Products
Abstract
An antibacterial fluid may be applied to a tubular medical cannula for access to a patient. The fluid comprises a typically metabolizable antibacterial formulation having a viscosity preferably greater than 150,000 cp. The cannula may then be inserted into the patient with an increased lubricity for a reduction of pain, while at the same time, unlike silicones, preferred materials do not readily accumulate in the patient. The fluid may be placed on the skin. The tubular medical cannula may be a rigid, hollow needle, sharp or blunt, a spike, or a flexible catheter. Also, the viscous antibacterial fluid may be used to lock a catheter or other cannula while implanted in the patient, for storage purposes. The formulation is typically an alcohol plus a viscosity increasing agent and optionally a surfactant, a clotting agent, and/or EDTA.
85 Citations
31 Claims
- 1. A transparent, antibacterial formulation which comprises an alcohol mixed with sufficient viscosity increasing agent to provide a viscosity of more than 150,000 up to about to 500,000 cp, to the formulation, and further comprising an alcohol-soluble surfactant that improves transparency.
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9. The method which comprises placing a fluid on the outer surface of a medical cannula, said fluid comprising an alcohol and having a viscosity of more than 150,000 cp, up to about 500,000 cp, and thereafter inserting the cannula through the skin of the patient or into a sterile receptacle.
- 10. The method which comprises placing a portion of a transparent fluid, which comprises an alcohol and has a viscosity of more than 150,000 cp, up to about 500,000 cp, on the skin of a patient to form a fluid layer on the skin, and thereafter passing a medical cannula through the fluid layer on the skin and through the skin of the patient.
- 13. A transparent fluid which comprises an alcohol and a surfactant, mixed with sufficient viscosity increasing agent to provide a viscosity of more than 150,000 cp, up to about 500,000 cp, said fluid having the characteristic of forming a skin on its surface when exposed to the air, to retard the evaporation of said alcohol, and thus to prolong its antibacterial effect when placed in contact with the skin or other surface.
- 17. A medical cannula which extends through the skin of a patient and which connects to a medical flow conduit at an end of said cannula which is outside of the skin, said medical cannula extending through a pool of antimicrobial formulation carried on the skin of the patient, said pool comprising an alcohol mixed with sufficient viscosity increasing agent to provide a viscosity of more than 150,000 cp, up to about 500,000 cp, portions of said medical cannula being coated with said antimicrobial formulation.
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21. The method which comprises:
placing on a body surface of a patient an antimicrobial formulation which consists essentially of an alcohol mixed with sufficient viscosity increasing agent to provide a viscosity of more than 150,000 cp, up to about 500,000 cp to the formulation, whereby said formulation exhibits improved physical stability over lower molecular weight counterparts. - View Dependent Claims (22, 25)
- 23. The method of claim 23 in which the alcohol comprises isopropanol.
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26. An antibacterial formulation having a viscosity of greater than 150,000 cp, which comprises:
- 65-80 wt. percent of an alcohol;
6-10 wt. percent of polyvinylprrolidone;
from 0.2-2 wt. percent of polyethyleneimine, from 0.1-1 wt. percent of a polyalkyleneoxide surfactant, and water to make up a 100 percent balance. - View Dependent Claims (27, 28, 29)
- 65-80 wt. percent of an alcohol;
- 30. A formulation for use as a catheter locking formulation, having a viscosity of essentially 50,000-150,000 cp. which comprises an alcohol-water mixture that contains a viscosity increasing agent and sufficient EDTA to provide antibacterial characteristics.
Specification