Part One: The Bevel
By Zach Rogers
Editor, Havel’s Inc.
Lateral deviation is an all-too-common problem among many anesthesiologists, nurse anesthetists and radiologists in the field today. Although there have been many technological advances to help reduce deviation with longer spinal needles and procedure needles, the problem still persists. It doesn’t matter if you’re looking to steer the needle in a straight path or attempting to bypass certain obstacles or structures in the body, the end result of hitting your target accurately and effectively depends on a number of different factors.
But what exactly is lateral deviation? Simply put, lateral deviation occurs when your needle gets set off course from its original target or target area. This is due to a variety of reasons. For example, the quality and flexibility of the needle can drastically alter its final destination. The length of the needle also plays a big role, as well as the distance it has to travel once inside the body. There is also always some form of internal resistance or pressure from the body whenever a needle is inserted, which can affect the path your needle takes. Perhaps the biggest influence of all depends on how well the needle is designed.
The best solution at reducing lateral deviation is by using a needle that is both easily steerable and made with a specific kind of tip. The bevel-tipped needle is probably the most common needle point used in the health care industry. The bevel is the slanted edge found at the very tip of the needle. The sharp, angled edge of the bevel allows for easier penetration and aids in directing the needle to a specific location. There are different degrees which determine what the needle will be used for. For instance, an 18 degree bevel is most commonly used on spinal needles, which allows easier insertion through muscles. A 30 degree bevel is perfect when dealing with any kind of nerve block procedures, since the needle is less sharp and in turn less likely to cause nerve damage.
More precise aiming and control of your needle is always the end result, but even with a standard bevel-tipped needle, lateral deviation can still occur. That’s why Havel’s has gone the extra mile with our line of Hakko specialty needles and added two small back bevels on all of our spinal and procedure needles. This has a few distinct advantages. For one, it makes puncturing the skin a lot easier. It also does a superior job at keeping the needle on track to its target by cutting smoothly as it goes through the body. With our additional back bevels, accuracy and control is in your hands, no matter where your target may lie. More exact needle placement ultimately leads to a more successful outcome for both the doctor and the patient, and with our Hakko multi-bevel spinal needles and procedure needles, you can rest assured your target will be reached every time.