Each Horizontal-Vertical (H-V) lumbar valve system adjusts for changes in posture to maintain pressure at appropriate levels in the standing and recumbent positions. When the valve unit is horizontal, the spring-actuated, ball-in-cone inlet valve alone controls the lower pressure limit. When the valve unit is vertical, the gravity-actuated, ball-in-cone outlet valve combines with the inlet valve to control the higher pressure.
Each valve unit is color-coded according to its combination of horizontal and vertical closing pressures for easy identification.
Only available in the United States
- 2 side-by-side, ball-in-cone valves in a silicone elastomer housing
- Closed tip lumbar catheter (F5, 46 cm)
- Suturable tubing clamp (F5)
- Stainless steel straight connector
- Stainless steel stepdown connector (F8 / F5)
- Open-ended, striped peritoneal catheter (F7, 71 cm)
- Guidewire in dispenser
- 14 gauge Tuohy needle (90 mm)
- Luer Connector
A sample set of H-V Lumbar valves was pressure tested at different flow rates (60, 50, 30, 20, 10 and 5ml / hr) before being subjected to two MRI sequences*. The products were tested again after MRI exposure. Additional H-V Lumbar valves were subjected to an MRI magnetic field of 1.5 Tesla. The results of the tests indicated that exposure to MRI does not affect the pressure settings of the valves. No significant forces or temperature changes were noticed during MRI exposure.
*T1 sequence, 2’05’’, 800 ms repetition time, 12 ms echo, 1.5 Tesla field
T2 sequence, 2’34’’, 3500 ms repetition time, 120 ms echo, 1.5 Tesla field