Stops Uncontrolled High-Pressure Injections in Peripheral Nerve Blocks
NerveGuard
NerveGuard
Stops Uncontrolled High-Pressure Injections in Peripheral Nerve Blocks
The risk of peripheral nerve injury remains a serious complication, with an incidence of postblock neuropathy reported up to 3 %. The causes include direct needle trauma, chemical injury from local anesthetics or adjuvants, as well as ischemia from vasoconstriction of nutrient vessels within the nerve.2
A central factor influencing the development of such nerve injuries is the injection technique – particularly the control of injection pressure. Studies have shown that an injection pressure of 15 to 20 psi is consistent with safe needle placement. Exceeding this threshold, especially during the initial injection (opening injection pressure, OIP), may indicate intraneural placement – with potentially serious consequences.2
Studies show that injection pressure currently represents the only objective criterion for detecting needle to nerve contact.3 The use of the subjective "hand-feel" technique to avoid high injection pressures is, unfortunately, not reliable as studies with experienced users have shown.1
The NerveGuard is a disposable in-line manometer4 and works as a hard-stop limiter5/pressure-limiter4 rather than a monitor. In-line pressure measurement shows high sensitivity for detection of needle to nerve contact.6 Allowing identification of an inappropriate needle position, and reducing injections performed with excessive pressure.7
NerveGuard Overview
NerveGuard Features & Advantages
STOPS at ≥15 psi
- NerveGuard stops the fluid flow automatically at 15 psi before intraneural injection can take place.
Clear Pressure Indication
- No interpretation of the injection pressure information is required and interpretation errors can be avoided.4,5
Flexible Placement
- The NerveGuard device is designed to be placed between the syringe and tube during peripheral nerve blocks.4 Alternatively it can be slipped directly into the back of a needle’s hub.
Compact and Compatible
- Fully functional without the need for additional equipment.
No Distraction
- The operator handling the syringe can be focused on other aspects of monitoring such as evidence of correct spread on the ultrasound screen or the presence of blood in the injection tube.4
NerveGuard Ordering Info
| Item description |
LUER Item no. |
NRFit® Item no. | Purchase Unit |
|---|---|---|---|
| NerveGuard | single | sterile | for needle size 18G / 19G / 20G / 21G / 22G | 001151-38M | 001163-38M | 10 |
| Item description | NerveGuard | single | sterile | for needle size 18G / 19G / 20G / 21G / 22G |
|---|---|
|
LUER Item no. | 001151-38M |
|
NRFit® Item no. | 001163-38M |
| Purchase Unit | 10 |
Studies:
1, 5 Herreweghe I. V. et al. (2020). Injection Pressure Monitoring Devices: A Review by NYSORA-Europe. Anesthesiology News Special Edition, 101–104.
2, 4 Gadsden, J. (2018). Current devices used for the monitoring of injection pressure during peripheral nerve blocks. Expert Review of Medical Devices, 15(8): 571–578.
3, 7 Lee, C. C. M. et al. (2021). Recent Advances in Regional Anaesthesia. In: Chakraborty, A. (2021). Blockmate - A Practical Guide for Ultrasound Guided Regional Anaesthesia. Springer Nature Singapore Pte Ltd, 167–181.
6 McLeod G. A. (2021). Novel approaches to needle tracking and visualisation. Anaesthesia, 76 (1): 160–170.
NRFit® is a registered trademark of GEDSA and is used with their permission
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