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A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
A—HUMAN NECESSITIES
A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
A61B2018/0231—Characteristics of handpieces or probes
A61B2018/0262—Characteristics of handpieces or probes using a circulating cryogenic fluid
A61B2018/0268—Characteristics of handpieces or probes using a circulating cryogenic fluid with restriction of flow
A61B2018/0281—Characteristics of handpieces or probes using a circulating cryogenic fluid with restriction of flow using a tortuous path, e.g. formed by fins or ribs
A61B2018/0287—Characteristics of handpieces or probes using a circulating cryogenic fluid with restriction of flow using a tortuous path, e.g. formed by fins or ribs the fluid flowing through a long thin tube with spiral shape