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:
Aug. 13, 1996
Filed:
Oct. 20, 1994
Siemens Elema AB, Solna, SE;
Abstract
In a method for measuring the flow resistance of a catheter in an implanted medication infusion system, the system having a medication reservoir and a pump that conveys the medication from the reservoir into the patient through a catheter connected to the discharge of the pump via a one-way valve, and having a rinsing input for direct access to the catheter disposed upstream of the catheter and downstream of the pump, the time required in order to pump a pre-determined liquid volume through the catheter via the rinsing input at a predetermined pressure is measured. In a device for such a flow check, a testing device is provided for connection to the rinsing input, which pumps a predetermined liquid volume through the catheter via the rinsing input at a predetermined pressure. Measuring sensors are provided for supplying signals from which the time required for pumping this liquid volume can be determined.