# PNB : Peripheral Nerve Block

- Link: https://sifsof.com/clinical-apps/pnb-peripheral-nerve-block/
- Published: 2019-08-23T19:34:34+00:00
- Author: Monica

Ultrasound has been the primary tool in **Peripheral Nerve block** (**PNB**). The
utility of ultrasound to facilitate a range regional anesthesia techniques including
brachial plexus and femoral blocks .

A wireless portable ultrasound probe with a built in needle guide offers more control
for **[anesthesiologist](https://sifsof.com/product-category/doctor-specialties/anesthesiologist/)**
while performing **PNB**.

A [**mini linear**](https://sifsof.com/product-category/ultrasound-scanner/mini-linear-ultrasound-scanner/)
with high frequency transducer allows visualization of the anatomy of the region
of interest.

This allows more informed guidance for the needle pathway to the target while avoiding
structures that might be damaged by the needle.

The wireless ultrasounds also allow visualization of the needle tip as it is passed
through the tissues, confirming alignment with the intended path, again reducing
the likelihood of inadvertent needle trauma to unintended structures.

Moreover, for PNB the portable ultrasound scanner real-time ultrasound imaging permits
continual visualization of local anesthetic solution delivery to ensure proper distribution,
with the potential for adjustment of the needle tip position as necessary to optimize**
local anesthetic** distribution.

**Ultrasound-guided PNB** may be broken down into two fundamental aspects: imaging
structures in the plane of section, including the target nerve, and **guiding the
needle**. Nerve imaging may be performed in either short-axis (probe face** perpendicular**
to axis of nerve) or long-axis (probe face **parallel** to axis of nerve) position

![Nerve scan result](https://sifsof.com/wp-content/uploads/2019/12/PNB-scan-result.
png)

As anatomic recognition remains essential to placing blocks with real time visual
guidance. To optimize the ultrasound image, the mnemonic **PART** (pressure, alignment,
rotation, tilting) is recommended. Pressure is necessary to minimize the distance
to the target and compress underlying subcutaneous adipose tissues. 

Alignment refers to placing the transducer in a position over the extremity (or 
trunk) at which the underlying nerve is expected to be in the field of view. Rotation
allows fine-tuning of the view of the target structure. Tilting helps to bring the
face of the probe into a perpendicular arrangement with the underlying target to
maximize the number of returning echoes and thus provide the best image. 

Reference: [Introduction to Ultrasound-Guided Regional Anesthesia.](https://www.nysora.com/foundations-of-regional-anesthesia/equipment/introduction-ultrasound-guided-regional-anesthesia/)

 * ![Mini Linear Handheld WiFi Ultrasound Scanner 10-12-14 MHz, SIFULTRAS-3.5 main](
   https://sifsof.com/wp-content/uploads/2019/03/SIFULTRAS-3.5-mini-linear-ultrasound-
   scanner-300x300.jpg)
 * Mini Linear Handheld WiFi Ultrasound Scanner 10-12-14 MHz, SIFULTRAS-3.5
 * ![Color Doppler Mini Linear WiFi Ultrasound Scanner SIFULTRAS-3.51 main](https://
   sifsof.com/wp-content/uploads/2018/11/SIFULTRAS-3.51-wireless-mini-linear-color-
   doppler-ultrasound-scanner-300x300.jpg)
 * Color Doppler Mini Linear WiFi Ultrasound Scanner SIFULTRAS-3.51

[launchpad_feedback]

_Disclaimer: Although the information we provide is used by different doctors and
medical staff to perform their procedures and clinical applications, the information
contained in this article is for consideration only. SIFSOF is not responsible neither
for the misuse of the device nor for the wrong or random generalizability of the
device in all clinical applications or procedures mentioned in our articles. Users
must have the proper training and skills to perform the procedure with each ultrasound
scanner device._

_The products mentioned in this article are only for sale to medical staff (doctors,
nurses, certified practitioners, etc.) or to private users assisted by or under 
the supervision of a medical professional.  _