Normalization And Personalization: Clinical Selection Strategy For The Quick-Core® Biopsy Needle Product Matrix

In the daily work of interventional radiology, ultrasound departments, and endoscopy centers, dealing with constantly changing lesions and patients with significant individual differences, no single "universal" biopsy needle can handle all scenarios. The essence of clinical decision-making lies in "selecting the most appropriate tool for a specific problem". The Quick-Core® biopsy needle offers a wide range of product specifications - from 14G to 20G needle diameters, from 6cm to 20cm in length, and 10mm and 20mm throw lengths - which are not simply a collection of products, but a systematic solution designed to cover all scenarios of biopsy needs. Understanding the design logic and clinical indications behind each specification is key to optimizing biopsy procedures, maximizing diagnostic benefits, and minimizing patient risks.
Choice of Needle Diameter (Gauge): A precise balance between sample size and risk of trauma. Needle diameter is one of the most crucial parameters of the biopsy needle, usually denoted by "G", with larger numbers indicating thinner needles. Quick-Core® covers the commonly used range from 14G (thicker) to 20G (thinner), and each specification corresponds to a different clinical strategy.
- 14G and 16G (thick needles): These needle diameters are mainly used in situations where a large amount of tissue is needed for detailed histological analysis, special staining (such as immunohistochemistry) or molecular pathology testing (such as gene sequencing). For example, when performing biopsies on lymph nodes suspected of lymphoma, soft tissue sarcomas, or liver cancer that requires classification, sufficient tissue volume is essential for a clear diagnosis. Thick needles can obtain more complete and longer tissue strips, providing pathologists with more materials for section analysis, resulting in higher diagnostic confidence. However, the drawback of thick needles is that they may cause greater trauma, have a higher risk of bleeding, and have more stringent technical requirements for the operator. Therefore, they are typically used in cases where the percutaneous puncture path is clear, avoiding major blood vessels, and where the patient has good coagulation function.
- 18G (standard needle): This is the most widely used specification in clinical practice, achieving a good balance between tissue acquisition volume and safety. It is suitable for most percutaneous biopsy procedures of the liver, kidneys, prostate, breast, and deep soft tissues. The 18G needle usually provides sufficient tissue for routine pathological diagnosis while keeping the complication risk under control.
- 20G (thin needle): These are mainly used in areas with high sensitivity to bleeding risk, or when the lesion is deep and the surrounding vascular and nerve structures are complex. For example, percutaneous lung biopsies (especially when adjacent to major blood vessels), pancreatic mass biopsies, thyroid nodule biopsies, and biopsies of pediatric patients. Thin needle puncture causes minimal trauma and is well tolerated by patients, but the tissue volume obtained is relatively small, which may be more suitable for cytological examination or combined with rapid on-site assessment (ROSE) to ensure sampling adequacy. The Quick-Core® 20G needle, combined with its efficient sampling mechanism, strives to obtain valuable tiny tissue fragments even with a thin needle diameter.
Consideration of work length: Adaptation to full-path coverage from the surface of the body to the deep tissues. The length of the biopsy needle must be sufficient to safely reach the target lesion from the skin puncture point and leave enough operational margin. Quick-Core® offers various lengths ranging from 6cm to 20cm.
- Short length (6cm, 9cm): Suitable for biopsy of superficial organs or tumors, such as thyroid, breast, superficial lymph nodes, subcutaneous masses, etc. The short needle is easier to handle and has good stability, making it particularly suitable for "in-plane" puncture beside the ultrasound probe.
- Medium length (11cm, 15cm): This is a common choice for percutaneous puncture of abdominal and pelvic organs such as liver, kidney, prostate, etc. Consider the patient's body type (degree of obesity), the inclination angle of the puncture path, and the depth of the lesion.
- Long length (20cm): Specifically designed for deep or special path punctures. For example, vertebra or sacral lesion biopsy via the gluteal muscle path, certain deep retroperitoneal lymph node biopsies via the liver or spleen, or long path punctures that need to avoid multiple structures under CT guidance. An excessively long needle body may lead to decreased maneuverability and needle bending problems. Therefore, Quick-Core® ensures the rigidity and stability of its long needle through reinforced needle body materials and structures.
The wisdom of throw length: a "sampling window" that matches the size of the lesion. The throw length, which is the distance the cutting sleeve travels forward after firing, determines the length of the sampling notch exposed in the tissue, directly affecting the size of the tissue strip obtained. Quick-Core® offers two options: 10mm and 20mm.
- 10mm throwing length: This is the most common choice, suitable for most solid lesions with a size of 1-2 centimeters or larger. It can obtain sufficient tissue strips for diagnosis while avoiding collecting normal tissues from the edge of the lesion at the same time, which may affect the specificity of diagnosis.
- 20mm throwing length: This is mainly used for larger masses or when more tissue samples are needed. For example, for multiple multi-directional sampling of large liver tumors to assess heterogeneity, or for biopsies of tumors that require a large amount of tissue for multiple molecular tests (such as non-small cell lung cancer). When using a long throwing length, special attention must be paid to ensuring that the lesion is large enough and the entire sampling slot travel is within the lesion to avoid damaging normal tissues on the other side of the lesion or performing empty suction.
Tactical choice of needle tip shape: single slope, double slope and Mitsubishi's clinical alignment. The needle tip acts as the "pioneer" of the puncture, and its shape determines the efficiency and controllability of the initial penetration. Quick-Core® offers three options for the surgeon to choose based on the characteristics of the tissue.
- Single Bevel: A classic design. During puncture, due to the asymmetrical force, there will be a slight deflection force towards the opposite side of the bevel. Experienced surgeons can utilize this characteristic for fine-tuning. The strong echo (known as "lighthouse sign") produced by the bevel under ultrasound helps in locating the needle tip.
- Double Bevel: A symmetrical design. The puncture trajectory is straighter and more controllable, suitable for deep punctures or operations close to important structures that require precise straight needle insertion.
- Mitsubishi/Franseen: Features three cutting edges. During rotational needle insertion, it can more effectively cut fibrotic or dense tissues (such as hard cancer, fibrotic pancreas), resulting in a more complete tissue strip. It is particularly favored in ultrasound endoscopy-guided punctures (EUS-FNA/FNB).
Integrated decision-making: Developing personalized biopsy plans. In actual clinical practice, the selection process is comprehensive. For instance, when performing a biopsy on a deep liver small vascular tumor in an obese patient, a combination of 20G fine needle, 15cm length, 10mm throw length, and double beveled needle tip might be chosen to obtain diagnostic samples while ensuring safety. For a superficial, larger soft tissue sarcoma, a 14G thick needle, 9cm length, 20mm throw length, and Mitsubishi needle tip might be selected to maximize the tissue acquisition volume for classification. The rich product matrix of Quick-Core® is precisely designed to empower clinicians, enabling them to construct the most optimized and individualized biopsy toolkit like assembling modular components based on imaging assessment, lesion characteristics, patient condition, and personal experience. This "precise matching" capability is an important manifestation of modern interventional diagnosis moving towards personalization and refinement.