Safety devices for peristaltic pumps
US5927951A · kind A · utility
Inventor
Key dates
| Filing date | Apr 2, 1997 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Apr 2, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B2205/15
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention is a disposable combination of tubing components for use with the roller pump that limits the negative pressure said pump generates (e.g. during left ventricular venting). The device consists of pump tubing and a shunt with resistance to flow placed between the inlet and outlet of the pump tubing. The device may also incorporate interconnecting tubing and a one way valve at the pump inlet tubing. The valve decreases the likelihood of pumping air or fluid into the ventricle with accidental pump reversal. In one preferred embodiment the device is called the Better-Ventera. The pump tubing of the device collapses more readily than tubing currently being used for either venting or suction applications, thus limiting the negative pressure generated by the pump to safer levels. In addition, the maximum suction generated by the pump is further limited by recirculation of flow between the pump inlet and outlet. The recirculation acts to "break" high suction. As pump inlet pressure decreases, flow through the shunt increases to maintain the negative pressure above that possible without the recirculation line. If a higher suction is desired, the shunt tubing can be clam…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.