The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 16, 1976
Filed:
May. 12, 1975
Applicant:
Inventor:
Ebbe Johansen, Birkerod, DK;
Assignee:
Radiometer A/S, , DK;
Primary Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
128 / ; 128D / ;
Abstract
The invention relates to a method for collecting a blood sample from a blood vessel, such as an artery, by means of a syringe, preferably of the type having a piston displaceably mounted within a cylinder which is provided with a hollow needle. Before the needle is inserted in the blood vessel from which the blood sample is to be collected the piston is displaced to a retracted position, and the cylinder space defined by the piston is vented to the atmosphere. The invention also relates to a blood sampling syringe having means for venting the cylinder space to the atmosphere in a retracted position of the syringe piston.