Cryoneedle

• Main Authors: ZACHMAN ANDREW KEVIN, BLEIWIES MODECHAY, JOHNSON MARK THOMAS, RAMADHYANI SATISH
• Format: Patent
• Language: Chinese; English
• Published: 15.01.2021
• Subjects: DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; SURGERY

A cryoneedle comprises an outer tube having a distal section with a generally central gas supply line placed within the outer tube. The gas supply line supplies a cryogas for forming an iceball on anouter surface of the outer tube over the distal section. The gas supply line terminates in an expansion chamber placed within the distal section. The cryoneedle comprises a heat exchange helix contacting the inner surface of the outer tube. The heat exchange helix has an increasing surface area per unit distance of the distal section such that the iceball has a generally symmetric shape. 本发明提供了一种低温针，所述低温针包括具有远端段的外管，其中大致中央的气体供应线路放置在所述外管内。所述气体供应线路供应用于在所述外管的外表面上在所述远端段上方形成冰球的低温气体。所述气体供应线路终止于放置在所述远端段内的膨胀室中。所述低温针包括热交换螺旋状物，所述热交换螺旋状物接触所述外管的内表面。所述热交换螺旋状物具有按每单位距离的所述远端段逐渐增大的表面区域，使得所述冰球具有大致对称的形状。