Table 1.
Characteristics of programmable shunt valves available in Japan
| Type | Setting range (cmH2O) | Setting steps | Lock mechanism | MRI artifact *1 | Workable depth (mm) *2 | Antisiphon mechanism | Availability in LP shunt | |
|---|---|---|---|---|---|---|---|---|
| Sophy | SM8/SM8–140 SM8–300/SM8–400 |
3–20/1–14 5–30/8–40 |
8 | − | L | 10 | – | + |
| Polaris | SPV/ SPV-140 SPV-300/ SPV-400 |
3–20/1–14 5–30/8–40 |
5 | + | L | 8 | – | + |
| CHPV | Standard/in-line | 3–20 | 18 | − | S | 18 | – | + |
| CHPV-SG | Right angle/micro | 3–20 | 18 | − | S | 18 | Siphon guard | + |
| StrataNSC | Regular/small/LP | PL 0.5–2.5 | 5 | − | M | 10 | – | + |
| Strata II | Regular/small | PL 0.5–2.5 | 5 | − | M | 10 | Delta chamber | − |
| ProGAV | ProGAV/ProGAV2.0 | 0–20 | 21 | + | S-M | 10 | Shunt assistant | ± |
| ProSA | ProSA | 0–40 | continuous | + | S-M | 10 | ProSA | ± |
*1: S, M, L means small, medium, and large respectively,
*2: values are reference data, and are not guaranteed by maker,
CHPV-SG: Codman-Hakim programmable valve siphon guard, GAV: gravity assisted valve, LP: lumboperitoneal, MRI: magnetic resonance imaging, NSC: no siphon control, PL: performance level, SPV: Sophysa Polaris valve.