Tähystysneula

Tähystysneula, also known as a biopsy needle, is a medical instrument used in diagnostic procedures. It is a slender, hollow needle designed to obtain a sample of tissue or cells from within the body for examination under a microscope. This process is crucial for diagnosing various medical conditions, including cancer and infections.

The design of a tähystysneula varies depending on its intended use. Some needles are designed for fine-needle aspiration (FNA), where a small sample of cells is suctioned out. Others are larger and designed for core needle biopsies, which retrieve a small cylinder of tissue. Many tähystysneulat are equipped with a stylet, a solid rod that fits inside the hollow needle to maintain its patency during insertion and prevent contamination of the sample.

The procedure using a tähystysneula is typically performed by a physician or radiologist. It can be guided by imaging techniques such as ultrasound, CT scans, or X-rays to ensure accurate placement and collection of the sample from the target area. After the sample is obtained, it is sent to a pathology laboratory for analysis by a pathologist. The results of the biopsy help in determining the nature of a lesion, whether it is benign or malignant, and can guide subsequent treatment decisions. The use of a tähystysneula is a minimally invasive technique, generally well-tolerated by patients.