UBE surgical tools-UBE fiber ring knife

Structural features and advantages
Shape features
Triangular semi-arc design: The annulus fibrosus dura mater resection knife is triangular semi-arc, which has unique advantages in UBE surgery. The triangular part can provide precise cutting edges, which is conducive to accurately cutting into the annulus fibrosus or dura mater tissue. The semi-arc shape can better fit the anatomical curve inside the spine. For example, when dealing with the annulus fibrosus at the edge of the intervertebral disc or the pathological tissue around the dura mater in the spinal canal, the semi-arc shape can follow the natural form of the tissue to reduce damage to the surrounding normal tissue.
Size advantage
4.0MM diameter: The diameter of 4.0MM allows the resection knife to have good passability when passing through the UBE surgical channel. In spinal surgery, especially in the cervical and thoracic areas, the surgical channel is relatively narrow. This size can ensure that the resection knife can reach the surgical site smoothly without causing excessive pressure on the surrounding tissue. It can flexibly operate in limited spaces such as the intervertebral disc space and spinal canal to effectively remove diseased annulus fibrosus and dura mater tissue.
Application scenarios in UBE surgery
Applications in intervertebral disc surgery
Annulus fibrosus resection: In UBE surgery for intervertebral disc herniation, the triangular semi-arc resection knife can be used to accurately remove the diseased annulus fibrosus tissue. After endoscopically locating the protruding nucleus pulposus and degenerated annulus fibrosus, the resection knife can use its triangular blade to accurately cut into the edge of the annulus fibrosus, and then gradually remove the annulus fibrosus around the protruding part along the semi-arc shape. For example, in the surgery of lumbar disc herniation, for the protruding annulus fibrosus in the L4-L5 or L5-S1 segments, the resection knife can effectively clean the diseased annulus fibrosus without damaging the surrounding nerves and normal intervertebral disc tissue, creating better conditions for nucleus pulposus removal.
Preventing recurrence: After treating the protruding nucleus pulposus, using the resection knife to properly trim the annulus fibrosus incision can make the edge of the annulus fibrosus smoother and reduce the risk of re-protrusion of the nucleus pulposus after surgery. By accurately removing part of the weak annulus fibrosus tissue that is prone to rupture again, the overall stability of the annulus fibrosus can be enhanced and the long-term effect of the surgery can be improved.
Application in spinal canal surgery
Treatment of extradural lesions: In the surgery of extradural lesions in the spinal canal, such as the cleaning of extradural tumors, hematomas or scar tissue, the triangular semi-arc resection knife can play an important role. Its shape can remove the lesion tissue in a relatively safe way along the outer surface of the dura mater. In cervical or lumbar spinal canal surgery, when encountering extradural space-occupying lesions, the resection knife can gradually remove the lesion tissue without damaging the dura mater, thereby reducing the pressure on the spinal cord and nerve roots.
Auxiliary treatment of dural lesions: When the dura mater itself has lesions (such as local thickening of the dura mater, calcification, etc.) that need to be treated, the resection knife can carefully remove or trim the lesion part of the dura mater under strict control of the depth. Because its shape can better fit the curve of the dura mater, doctors can operate more accurately, reduce surgical risks, and avoid damage to the spinal cord and nerve roots under the dura mater through real-time observation of the endoscope.
Operation precautions and skills
Operation precautions
High visualization requirements: UBE surgery relies on endoscopic visualization. Before using the annulus fibrosus dura mater, the endoscopic field of view must be clear. Only by clearly seeing the relationship between the resection knife and the annulus fibrosus, dura mater and surrounding tissues can a safe and effective operation be performed. Otherwise, it is easy to accidentally injure important tissues such as nerves and blood vessels due to lack of visibility.
Strict depth control: Due to the involvement of important structures such as the annulus fibrosus and dura mater, the cutting depth of the resection knife must be strictly controlled during the operation. Especially when dealing with dura mater lesions, once the dura mater is cut, serious complications such as cerebrospinal fluid leakage may occur. Therefore, doctors need to observe carefully through the endoscope and combine hand feel to carefully control the cutting depth.
Accurate tissue identification: Accurately identify the lesion tissue and normal tissue to avoid excessive resection. Around the annulus fibrosus and dura mater, normal tissue is essential for maintaining the stability of the spine and neurological function. Only by accurately removing the lesion part can the treatment goal be achieved and postoperative complications be reduced.
Operation skills
Incision skills: According to the anatomical path observed by the endoscope and the location of the lesion tissue, the triangular semi-arc resection knife is brought close to the target tissue at an appropriate angle and direction. When cutting into the annulus fibrosus or dura mater lesions, first use the tip of the triangular blade to gently touch the tissue, then slowly apply appropriate pressure to gradually cut into the blade. For example, when dealing with the annulus fibrosus of the intervertebral disc, cut from the most obvious part of the annulus fibrosus, and be careful not to cut too deep to damage the nucleus pulposus and internal fibrous tissue.
Resection skills: During the resection process, use appropriate cutting actions according to the toughness of the tissue and the scope of the lesion. For the annulus fibrosus tissue, the semi-arc shape can be used to expand the resection range by rotating the resection knife; for epidural lesions, a small sawing cutting action is used, and the separation of the tissue is observed while cutting. During the entire operation, the position and cutting method of the resection knife should be flexibly adjusted in combination with real-time observation of the endoscope to achieve the best surgical effect.