Disposable manometer NerveGuard

Overview
The NerveGuard is a disposable in-line manometer and hard-stop pressure limiter designed for use during peripheral nerve block procedures to prevent uncontrolled high-pressure injections. It functions as an automatic pressure limiter that stops fluid flow when the defined threshold is reached, enabling objective identification of elevated opening injection pressure (OIP) during needle placement.

Key benefits

• Automatic hard-stop at ≥15 psi to reduce the risk of intraneural injection.
• Clear objective indication of excessive injection pressure—no subjective hand-feel interpretation required.
• Flexible placement: in-line between syringe and tubing or inserted into the back of a needle hub.
• Compact, single-use sterile device compatible with common needle diameters (20G/21G/22G).
• Allows clinicians to remain focused on ultrasound imaging and monitoring while pressure limits are enforced automatically.

Function & clinical rationale
The device detects elevated injection pressure with high sensitivity and acts as a mechanical hard-stop limiter to prevent further injection once the threshold is reached. Clinical and preclinical evidence links opening injection pressure (OIP) and high injection pressures with needle-nerve contact and an increased risk of nerve injury; using an objective pressure limiter supports safer needle positioning and injection practice.

Ordering information
Item description | LUER Item no. | NRFit® Item no. | Purchase Unit
NerveGuard | single | sterile | For single-shot applications in diameters of 20G/21G/22G | 001151-38M | 001163-38M | 10

Downloads & media
Product-related video available (embedded on product page).

References / Evidence (selected)

• Injection pressure is an objective indicator of needle-nerve contact; subjective hand-feel is unreliable.
• Studies correlate opening injection pressure (OIP) and high injection pressures with needle-nerve contact and fascicular injury in animal and clinical models.

Caractéristiques / spécifications techniques

• Type: Disposable in-line manometer / hard-stop pressure limiter.
• Function: Automatically stops flow at ≥15 psi.
• Placement: In-line between syringe and tubing or inserted into needle hub.
• Intended use: Peripheral nerve blocks (single-shot applications).
• Single-use: Sterile, disposable device.
• Compatible needle diameters: 20G / 21G / 22G.
• Ordering references: LUER item no. 001151-38M; NRFit® item no. 001163-38M; purchase unit: 10 per pack.