Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Oxygen delivery agents and uses for the same

a technology of oxygen delivery agent and oxygen, applied in the field of oxygen delivery agent or blood substitute, can solve the problems of limited thermal expansion ability and practical constraints

Inactive Publication Date: 2007-03-15
CEREVAST THERAPEUTICS
View PDF99 Cites 29 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention describes a method for delivering oxygen to a patient by administering a composition containing a fluorinated gas and a stabilizing material. The composition can also contain oxygen before or after it is administered to the patient. The method can also involve using ultrasound to monitor and deliver oxygen to specific regions of the patient. The stabilizing material can be in a vesicular or non-vesicular form. An apparatus for making the oxygen delivery agent is also described, which involves mixing the stabilizing material and the fluorinated compound in a syringe or other suitable vessel. Evacuation devices can also be used. The technical effects of the invention include improved methods for delivering oxygen to patients in a safe and effective way."

Problems solved by technology

However, these liquid perfluorocarbons boil at temperatures far above physiological conditions, and thus have a limited ability to thermally expand.
This limitation imposes a practical constraint on the amount of infused liquid perfluorocarbon that may be administered to a patient in need of an oxygen-carrying blood substitute.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Oxygen delivery agents and uses for the same
  • Oxygen delivery agents and uses for the same
  • Oxygen delivery agents and uses for the same

Examples

Experimental program
Comparison scheme
Effect test

example 1

Preparation of Gas Filled Vesicles

[0285] To prepare gas filled vesicles, a 5 ml solution of a lipid mixture (5 mg / ml) containing 87 mole % dipalmitoylphosphatidylcholine (DPPC), 8 mole % dipalmitoyl-phosphatidylethanolamine-polyethylene glycol-5000 (DPPE-PEG-5000), 5 mole % dipalmitoylphosphatidic acid (DPPA) (all supplied by Avanti Polar Lipids, Alabaster, Ala.) in 8:1:1:1 normal saline:glycerol:propylene glycol solution, was placed in a 15.8 ml glass bottle with a rubber stopper. Air was evacuated from the bottle using a vacuum pump (Model Welch 2-Stage DirecTorr Pump, VWR Scientific, Cerritos, Calif.) by connecting the hose to the bottle through an 18 gauge needle perforating the rubber stopper. After removing the air, perfluorobutane (Pfaltz and Bauer, Waterbury, Conn.) was placed in the stoppered bottle via another 18 gauge needle connected to tubing attached to a canister of perfluorobutane. This process was repeated 5 times so that any traces of air were removed from the sto...

example 2

Methods of Sizing Gas Filled Vesicles

[0288] The first method for sizing gas filled vesicles is applicable with diluents with different gas compositions, for example air-saturated saline, nitrogen-saturated saline or degassed saline. A mechanical diffusion pump is throttled to achieve various gas concentrations in the solutions. The level of oxygen is detected with an oxygen sensitive electrode. The “collect data” feature on an optical particle sizer is used with dilute solutions, otherwise the “autodilute” function is used. The accuracy of the particle count is a function of concentration and is more accurate for dilute solutions.

[0289] The second method for sizing gas filled microspheres is optical microscopy, which employs an analytical program for averaging several frames of sampling. Size distribution, concentration and statistical analysis of variation can all be determined this way.

[0290] A 200 ml lipid solution (i.e., 200 mg of the lipid mixture described in Example 1 in 2...

example 3

In Vivo Admimistration of Gas Filled Vesicles

[0291] Lipid vesicles were prepared following the method in Example 1, except that the gas used was pertluoropropane or a combination of 80% perfluoropropane and 20% air. As would be known to the skilled artisan, air comprises about 21% oxygen, so that 20% air would comprise approximately 4% oxygen.

[0292] Ten groups of mice were injected with the lipid vesicles (e.g., the lipid mixture from Example 1)containing perfluoropropane. For Groups 1-5, the lipid vesicles contained 100% perfluoropropane. For Groups 6-10, the lipid vesicles contained 80% perfluoropropand and 20% air.

[0293] The deaths of the mice exposed to the lipid vesicles in Groups 1-10 were recorded after one hour. In Groups 1-5, which were exposed to lipid vesicles containing 100% perfluoropropane, only mice receiving over 4.0 cc / kg body weight died. The actual mortality rate was 60% in mice receiving this dose. On the other hand, in Groups 6-10, which were exposed to lipid...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention describes, inter alia, oxygen delivery agents or blood substitutes comprising a fluorinated gas and a stabilizing material, uses for the oxygen delivery agents or blood substitutes, and apparatus for making and delivering the oxygen delivery agents or blood substitutes.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] Under 35 USC § 120, this application is a continuation application of U.S. application Ser. No. 10 / 336,906 filed Jan. 6, 2003, now issued as U.S. Pat. No. 7,105,151; which is a divisional application of U.S. application Ser. No. 08 / 877,826 filed Jun. 18, 1997, now issued as U.S. Pat. No. 6,537,246. The disclosure of each of the prior applications is considered part of and is incorporated by reference in the disclosure of this application.FIELD OF THE INVENTION [0002] The present invention describes, inter alia, oxygen delivery agents or blood substitutes comprising a fluorinated gas and a stabilizing material, methods of using the oxygen delivery agents or blood substitutes, and apparatus for making and delivering the oxygen delivery agents or blood substitutes. BACKGROUND OF THE INVENTION [0003] A theoretical assessment of oxygen delivery agents and the efficacy of loading and unloading oxygen is described from the standpoint of the pa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): A61K49/22A61B8/00A61K9/127A61K41/00
CPCA61K9/1271A61K49/223A61K47/48053A61K41/0028A61K47/544
Inventor UNGER, EVAN C.MCCREERY, THOMASWU, YUNQIU
Owner CEREVAST THERAPEUTICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com