What is leopard surgery? You will understand everything after reading it

Lip knife surgery is an advanced treatment method specifically for the female cervix. For example, severe cervical erosion is often treated with this surgery. This surgery has been promoted throughout the world, and now many hospitals can perform this surgery.

1. LEEP knife technology uses a series of ring-shaped tungsten wire electrodes to treat various cervical lesions and is currently an advanced method for treating cervical diseases.

2. Technical Principle

The LEEP knife uses a high-frequency radio knife to pass through the LOOP wire, which generates an ultra-high frequency of 3.8 MHz from the tip of the electrode.

Microwave) radio waves, when they come into contact with body tissues, the tissues themselves generate impedance, absorb the radio waves to generate high heat, and make the water in the cells form steam waves to complete various surgical purposes such as cutting and hemostasis, but it does not affect the pathological examination of the tissues at the edge of the incision. The principles of high-frequency radiofrequency surgery are different from those of traditional electrosurgical surgery: traditional electrosurgical surgery uses the impedance of the electrode itself, and the high heat generated by the current passing through it to achieve the surgical purpose. The output frequency is 0.3-1.0 MHz, while the heat energy converted by the radio frequency of the high-frequency radiofrequency surgery is generated inside the tissue. The sine wave generated by the radio frequency causes the water in the cells to oscillate, generating heat and evaporation. The cells contacted by the emission technique rupture, causing the tissue to separate, and the radio frequency emitter itself does not generate heat.

3. Scope of surgery

Regarding the scope of LEEP surgery, according to literature reports, lesions ≥ 2.5 cm should be cone-cut, and the scope of cone-cut should exceed normal tissue by 1 mm. Based on the experience of carbon dioxide laser treatment of CIN, it was found that the depth affects the cure rate. The average depth of CIN involving cervical glands is 1.24mm, and the deepest is 5.22mm. The depth of laser treatment increased from 3mm to 5mm, and the cure rate of lesions also increased from 68% to 87%. Studies have suggested that the ideal depth for LEEP cone biopsy of the cervix is ​​about 7 mm. According to literature reports, a needle electrode is repeatedly inserted into the cervical canal to a depth of 1.5 cm to destroy lesions in the cervical canal. This improvement has increased the cure rate and reduced the persistence rate of lesions to 2.7%. This study suggests that the ideal depth of LEEP cone biopsy of the cervix should be about 15 mm. The results suggest that LEEP conization in this range is more time-saving, labor-saving and safer than traditional electrosurgical conization. Regarding LEEP biopsy, research results have confirmed that a cervical depth of 4mm and a cervical canal depth of 4mm can achieve both diagnostic and therapeutic effects while avoiding the removal of excessive tissue, which is superior to cervical forceps biopsy.

Pathological characteristics

The edges of specimens from the traditional electrosurgical unit are 100% carbonized, and it is impossible to determine whether the edges of the specimens have been completely removed. Focal cancer is easily lost, which has a certain impact on pathological diagnosis and makes it difficult to diagnose microinvasive cancer. LEEP can provide complete, non-charred tissue specimens to determine whether the lesion has been completely removed, and can confirm micro-invasive cancers that are difficult to diagnose by colposcopy or traditional electrosurgery. As long as the characteristics of changes in cells caused by thermal effects are clearly understood, it will not hinder the judgment of pathological results.