Lung puncture needle biopsy method

First, a conventional lung CT scan is performed, and then the distance and angle from the puncture point to the predetermined puncture target are measured on the CT image. Measure the puncture depth, hold the patient's breath, and perform the puncture at a predetermined angle. When puncturing, pay attention to keep the puncture needle in the same scanning level of the puncture point, and try to use the direction parallel or perpendicular to the ground. After the puncture is in place, perform a local CT scan to determine whether the needle tip is in the lesion. If the direction needs to be adjusted, the puncture The needle is withdrawn to the chest wall and then adjusted, or pulled out and re-punctured. When adjusting the puncture needle or withdrawing the needle, ask the patient to hold their breath. When the needle is in the body, let the patient breathe calmly and try to avoid coughing. After the puncture, the puncture needle was withdrawn, and the puncture specimen was fixed and sent for pathological examination.

In recent years, intrapulmonary needle biopsy has been widely used in the diagnosis and differential diagnosis of clinical diseases. There are many non-vascular guidance methods to achieve the purpose of biopsy or treatment. In medical imaging, CT, fluoroscopy, Which technique depends on the location, size, nature of the lesion and the doctor's proficiency, habits and the patient's ability to bear. CT-guided percutaneous lung biopsy is relatively simple and has few complications.

The biggest advantage of using CT-guided puncture is that the CT image has high density and resolution, and can clearly show the size of the lesion, cysts and solids, whether there is necrosis, and the relationship with surrounding tissues and organs. It is not disturbed by gas, fat, and bone. Overlapping, thin-layer scanning can be used, the positioning is accurate, and the position of the needle tip can be judged. Therefore, the safety is good, the success rate of biopsy is high, up to 90%, and the treatment effect is also very good. However, CT-guided puncture also has disadvantages: because the imaging is not timely, the breathing movement will cause errors in accurate positioning, and the patient must be trained to master the breathing phase. When the puncture needle needs to form a certain angle with the cross section, the puncture technique is difficult, and the angle of the gantry can be adjusted.

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