Seat device for releasably retaining sample hypodermic needle of sample injection device utilized to inject fluid sample into fluidic path of measuring device for testing sample, has capillary tube in fluid communication with fluidic path

摘要

The device (300) has a capillary tube (304) partially arranged on a housing (302). An end section (306) of the capillary tube forms a needle seat for a sample hypodermic needle (202), where the capillary tube is in fluid communication with a fluidic path. The end section is conically extended in relation to a hollow cylindrical portion (314) of the capillary tube. Wall thickness of the capillary tube in the end section is smaller than that of the capillary tube beyond the end section. An outer small tube (310) surrounds an inner small tube (308) with mechanical stress. The outer small tube is made of material that is selected from a group consisting of metal, stainless steel, ceramic and high-strength plastic. Independent claims are also included for the following: (1) a sample injection device (2) a measuring device for testing a fluid sample (3) a method for manufacturing a seat device (4) a method for injecting a fluid sample into a fluidic path.