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rasound regional anesthesia is a recently evolved technique that has gained a very good reputation in recent years. Its use as a medical tool has increased lately due to its technical facilities and other advantages such as cost of the machines and their portability around the operating theatre. The factors that make this technique effective are increased cost effectiveness, reduction in the local anesthesia dose,[link widoczny dla zalogowanych], reduction in any complication rates, improved quality and block duration. Anesthetists prefer this technique in recent times. There have been reports on both extra usability and also flaws in the use of this technique. The optimum image quality depends upon the operator`s ability and the ultrasound machine that is selected.
The ultrasound image that is created helps visualise individual nerves, see the path of the nerve clearly,[link widoczny dla zalogowanych], depth and focus is also clearly visible. This makes it possible to intensify the returning signals which can be amplified and the image is more visible on the screen. The vicinity of the field can be adjusted to give the right image. The multiple ultrasound frequency spectrums are combined with the images caught from various beam angles into a single picture. The contrast resolution is improved. The doppler mode function can be used for checking the blood flow in neighboring structures.. The validity of the test is apparent in the relative echoes formed as a result of the motion in between the audio source and receiver.
Ultrasound regional anesthesia is useful in distinguishing non vascular from vascular structures in a Doppler test. It is used widely as its principle is useful in diagnosis. Ultrasound, a sort of mechanical audio energy passes via a conducting medium as a longitudinal wave resulting in alternating compression and rarefaction. The use of ultrasound regional anesthesia is new, the efficacy of the Ultrasound guidance is advanced. This technique provides visualization and echo of the localization of targets. The unwarranted patient postoperative can be reduced. Some patients suffer difficult anatomical landmarks and standard techniques may not be enough for nerve localization. The radiation risk is minimized. It reveals the nerve location and surrounding structures.
Real- time guidance is provided. Proper and purposeful needle movement,[link widoczny dla zalogowanych],[link widoczny dla zalogowanych], proper adjustments in direction and depth is possible. It improves the quality of sensory block. The onset time is set. The success rate is better improved while compared to nerve stimulator technique. The pulsed echo is in brief bursts. The signals returning to the transducer is compressed and amplified. The memory is stored with video images. In all modern surgical techniques the use of Ultrasound guided regional anesthesia is becoming more popular. It is envisaged that the use of medical ultrasound is the next big growth area in medical training hopefully giving real benefits to patient care.