Structural features and advantages
Dimensions
The 4MM diameter enables the shears to pass smoothly through the UBE surgical channel, and the 180MM length provides sufficient working distance for operations inside the spine. This size design ensures that the surgical site can be effectively reached without causing excessive pressure on surrounding tissues due to the large size of the instrument.
45-degree upward bend design
The 45-degree upward bend angle is a key feature of the shears. In spinal surgery, this angle allows the shears to better adapt to the physiological curvature and complex anatomical structure of the spine. For example, in the cervical and lumbar regions, the spine has a natural lordosis or kyphosis, and the upward bend shears can more easily reach the intervertebral disc space, the lateral wall of the spinal canal, and perform shearing operations on some tissues hidden behind the bend.
Pinless design
The pinless design makes the shears more flexible to operate. It allows doctors to control the force and angle of shearing more freely during surgery and can make fine adjustments according to different tissue types and surgical needs. Compared with the pinned design, the pinless shears can adapt more flexibly when encountering tissues of different thicknesses or toughness, avoiding unnecessary damage to the tissues due to the fixed shearing mode.
Application scenarios in spinal surgery
Disc tissue processing
In disc surgery, such as the treatment of disc herniation or disc degeneration, this shear can be used to process protruding disc tissue. When part of the disc tissue has protruded into the spinal canal, after endoscopic observation and positioning, the shears with a 45-degree upward bend can accurately reach the position of the protruding tissue. For some disc fragments that are adhered to the surrounding tissues, the adhered part can be cut off to facilitate subsequent nucleus pulposus cleaning. At the same time, for degenerated disc tissue, such as the part that is raised after the annulus fibrosus ruptures, the shears can also be trimmed with shears to keep the surgical area clean.
Spinal canal decompression operation
In the surgical treatment of spinal stenosis, shears play an important role. It can be used to cut the hyperplastic ligament tissue in the spinal canal. For example, when the yellow ligament is thickened and causes spinal canal stenosis, the 45-degree upward bending shears can follow the shape of the spinal canal to the appropriate position of the yellow ligament and cut off the excess part that compresses the nerve. In addition, the shears can also be used to clean up some scar tissue or small osteophytes in the spinal canal that may compress the nerves, expand the volume of the spinal canal, and decompress the nerves.
Assisted tissue separation and repair
During spinal surgery, tissue separation and repair are often required. The shears can assist doctors in separating tissues that are adhered together. For example, in spinal fusion surgery, when it is necessary to clean the soft tissue between the vertebrae to create good conditions for the placement of the fusion device, it can cut off the adhesion between the soft tissue and the bone surface. In some spinal injury repair surgeries, the irregular edges of the damaged tissue can also be properly trimmed with shears, which helps the tissue heal better.
Operation precautions and tips
Operation precautions
Since spinal surgery is performed under endoscopic visualization, it is necessary to first ensure that the endoscopic field of view is clear in order to accurately judge the relationship between the shears and the surrounding tissues. During the insertion and operation process, special attention should be paid to avoid damaging important tissues such as nerves and blood vessels. Because the pinless design may make the force control of the operation more delicate but also more challenging, it is necessary to control the shearing force during use to avoid excessive shearing that causes tissue tearing or bleeding.
Operation skills
Insertion skills: According to the anatomical path observed by the endoscope and the structural characteristics of the surgical site, combined with the 45-degree upward bend of the shearing pliers, insert at an appropriate angle and direction. It is necessary to use the natural anatomical gaps of the spine, such as the intervertebral disc space, nerve root canal, etc., to slowly and steadily insert the shearing pliers into the target position to avoid forced insertion and damage to surrounding tissues.
Shearing skills: When performing the shearing operation, first gently bring the cutting edge of the shearing pliers close to the target tissue, and adjust the shearing angle and force according to the size, thickness and toughness of the tissue. For tougher tissues, such as the yellow ligament, a step-by-step shearing method can be used, that is, applying shearing force in small amounts multiple times to avoid excessive force at one time. During the entire operation, the position and operation of the shearing pliers should be flexibly adjusted in combination with real-time observation of the endoscope to achieve the best surgical effect.
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