Medical instrument
AssigneeTerumo Kabushiki Kaisha
InventorsKazuhiko Hagiwara, Hiroshi Kitoh, Yoshihiro Oshibe, Hiroshi Ohmura
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Abstract
The blood flow channel sections of an oxygenator and a blood reservoir are hydrophilized by treatment with an acid, an albumin solution, polyhydroxy methacrylate, corona discharge, plasma or ozone, so that it has highly improved wettability by the priming liquid and the blood to prevent blood foaming. The blood flow channel sections of a medical instrument may be additionally hydrophilized by treatment with a polymer containing hydroxyethyl methacrylate and methyl methacrylate or in addition thereto a poly(oxyethylene)-poly(oxypropylene) block polymer.
Claims8
A blood reservoir comprising:
- a blood inlet port,
- a blood influent section in liquid communication with the inlet port,
- a blood storage section in liquid communication with the blood influent section, said blood storage section having at least a portion of the inner surface coated by a polymer containing hydroxyethyl methacrylate (HEMA) units and methyl methacrylate (MMA) units and being additionally coated with a poly(oxyethylene)-poly(oxypropylene) block polymer represented by the general formula:
- ##STR3## wherein 2.ltoreq.a+c.ltoreq.2000 and 10.ltoreq.b.ltoreq.150, and a blood outlet port.
A blood reservoir comprising:
- a blood inlet port,
- a blood influent section in liquid communication with the inlet port,
- a blood storage section in liquid communication with the blood influent section, said blood storage section having a bottom surface gradually descending from the blood influent section wherein said bottom surface has a coating of a polymer containing hydroxyethyl methacrylate (HEMA) units and methyl methacrylate (MMA) units and is additionally coated with a poly(oxyethylene)-poly(oxypropylene) block polymer represented by the general formula:
- ##STR4## wherein 2.ltoreq.a+c.ltoreq.2000 and 10.ltoreq.b.ltoreq.150, and a blood outlet port formed at the bottom of the blood storage section, wherein said bottom surface is hydrophilic.
Dependencies are inferred from the claim text.