Special Types Of Breast Biopsy Needles: Innovative Solutions For Complex Clinical Scenarios

https://www.mayoclinic.org/tests-procedures/breast-biopsy/about/pac-20384812

Conventional breast biopsy needles cannot cover all clinical scenarios. Special types of biopsy needles developed for specific needs are filling these gaps. These innovative products, through structural optimization or functional integration, overcome the limitations of traditional biopsy needles in specific situations.

Vacuum-Assisted Biopsy Needles (VABs) are among the best of these special types. Unlike traditional hollow needles, VABs use continuous negative pressure to "adsorb" lesion tissue into a sampling slot, and then use a rotating cutting blade to obtain the sample. Its core advantage lies in obtaining more tissue per insertion-8-10 tissue strips can be obtained in a single puncture, 3-5 times that of ordinary CNBs, making it particularly suitable for biopsies of small calcifications or multiple lesions. Furthermore, the VAB's cutting blade uses a "reciprocating motion" design, which reduces traction on surrounding normal tissue, lowering the postoperative hematoma incidence by 40%. Currently, VABs are available in various sizes: 8G core needles are used for breast mass excision biopsies, while 11G needles are specifically designed for calcification biopsies. The coaxial biopsy needle system is an innovative solution designed for multiple sampling. This system consists of an outer cannula (coaxial needle) and an inner biopsy needle: the coaxial needle is first inserted near the lesion, and then only the inner biopsy needle needs to be replaced to sample at different directions and depths, eliminating the need for repeated skin punctures. This design not only reduces the number of times patients experience pain but also lowers the risk of complications such as pneumothorax and bleeding. In the evaluation of the efficacy of neoadjuvant chemotherapy in breast cancer, the coaxial system allows for multiple biopsies before, during, and after treatment, dynamically monitoring tumor changes.

Labeled biopsy needles facilitate postoperative lesion localization. These needles integrate absorbable marker clips (such as titanium clips or biodegradable clips) at the needle tip. After the biopsy, the marker clip is released, providing anatomical landmarks for subsequent surgery or radiotherapy. For example, for microcalcifications detected by mammography, the marker clip released after the biopsy helps surgeons accurately locate the lesion during surgery, avoiding missed resections. Some labeled biopsy needles also integrate staining functions-the released dye can visually display the extent of the lesion during surgery, improving the accuracy of surgical resection.

Labeled biopsy needles also integrate staining functions-the released dye can visually display the extent of the lesion during surgery, improving the accuracy of surgical resection. Pediatric biopsy needles are designed specifically for the characteristics of breast diseases in adolescents. Children's breast tissue is delicate, and lesions are often benign (such as fibroadenomas), thus requiring biopsy needles with smaller diameters (18G-20G) and shorter lengths (2-3cm). These needles typically use flexible needle bodies to reduce tissue damage during puncture, and the needle hub is designed to fit the size of a child's hand, making it easier for doctors to operate.

The emergence of these special types of biopsy needles reflects the "patient-centered" design philosophy of medical devices and provides more possibilities for the diagnosis and treatment of complex breast diseases.