Device and method for detecting irregular placement of an extracorporeal vascular access needle

US8974394B2 · kind B2 · utility

Assignee

• Henry Ford Health System · US

Inventors

• Stanley Frinak · Farmington Hills, US
• Gerard Zasuwa · Redford, US
• Jerry Yee · Edmonton, CA
• Anatole Besarab · Bloomfield Hills, US
• John B. Kennedy · Chicago, US
• Douglas CURRY · West Lafayette, US
• Helen Kimball Hirschman · Evanston, US

Key dates

• Filing date: Jan 7, 2013
• Grant date: Mar 10, 2015
• Expiry date: Jan 7, 2033

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M1/3639
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A device and method for determining intravascular pressure and irregular needle placement in a hemodialysis procedure include analyzing means for automatically deriving venous access pressure (VAP) at a location of venous needle insertion into the patient and determining a ratio of VAP to mean arterial pressure, where the analyzing means determines multiple VAP values over multiple time periods and determines multiple ratios, one for each VAP value. Detecting means compare each ratio to a predetermined standard ratio derived from a moving average of prior VAP ratios, where the detecting means detects irregular needle placement when elevation of the ratio above the standard ratio is indicated.