Detailed Clinical Application Scenarios Of The Chiba Needle
Jul 04, 2026
From Image-Guided Biopsy to PTCD and Cyst Aspiration Across Multiple Specialties
https://radiopaedia.org/articles/chiba-needle
The reason the Chiba needle (Chiba Biopsy Needle) is a "must-have SKU" for interventional consumable manufacturers lies in its extremely broad cross-departmental applicability. The following outlines six mainstream application scenarios from the manufacturer-to-end-user perspective:
Fine Needle Aspiration Cytological Biopsy (FNA):
This is the classic use of the Chiba needle. Under real-time ultrasound or CT guidance, the surgeon inserts a 21G or 22G Chiba needle into the target lesion, withdraws the stylet, attaches a 5–10 mL syringe to apply negative pressure, and repeatedly advances/withdraws the needle slightly to aspirate cells. Applicable to: thyroid nodules (Bethesda classification screening), cervical lymph nodes, breast masses, focal liver nodules, pancreatic masses, renal tumors, and suspicious peripheral zone prostate lesions. Manufacturers are advised to offer models with centimeter markings and depth limiters to facilitate depth control and avoid puncturing through the opposite capsule.
Cyst and Abscess Aspiration/Irrigation/Sclerotherapy:
Simple hepatic/renal/ovarian cysts can be directly punctured with an 18G–20G Chiba needle for fluid aspiration and diagnostic sampling. Infected abscesses are first aspirated for culture; if needed, a micro-catheter can be left in place via the same tract for irrigation. The thin-walled, large-lumen design favors evacuation of viscous pus. Some manufacturers offer large-bore Chiba-type drainage needles (16G–18G) with side holes for this purpose.
Percutaneous Transhepatic Cholangiography & Drainage (PTC / PTCD):
Interventional radiologists often use a 22G or 21G Chiba needle to first puncture a dilated intrahepatic bile duct, inject contrast to opacify the biliary tree (PTC), then exchange over a guidewire to place a drainage catheter (PTCD). The ultra-fine tip of the Chiba needle can safely enter small biliary radicles, minimizing bile leak and bleeding risks. In this scenario, an echo-enhanced tip (Echo Tip) is particularly valuable.
Vascular Access Establishment & Angiographic Assistance:
For central venous catheterization or arterial angiography, the Chiba needle may serve as the initial puncture needle to access the subcuticular-to-vessel lumen (especially useful for ultrasound-guided peripheral vein or radial artery puncture). Its fine caliber reduces first-attempt hematoma rates. Some anesthesia/dialysis centers designate Chiba needles with transparent hubs for AVF first-puncture training.
Drug Injection / Ablation Needle Introduction Channel:
Percutaneous ethanol injection (PEI) for small hepatocellular carcinomas or pre-positioning before radiofrequency/microwave ablation can be performed using a Chiba needle for localization and tract confirmation, then exchanged over a guidewire to the therapeutic needle. Certain local chemotherapeutic agents (e.g., absolute ethanol, sclerosing agents) may also be directly injected via the Chiba needle into cystic or hypervascular lesions.
Pediatric & High-Risk Site Delicate Procedures:
Because the Chiba needle can be as fine as 23G (≈0.6 mm OD), it is safer for pediatric patients or those with coagulopathy, serving as the first exploratory tool for neonatal/pediatric interventions and lesions adjacent to critical vessels/nerves.
When preparing IFUs (Instructions for Use) and promotional brochures, manufacturers should highlight corresponding selling points for different departments: "echo marker + depth markings + depth stop" for ultrasound departments; "thin-wall large lumen + flexible bendability + multiple lengths" for interventional radiology; "PTC/PEI compatibility + guidewire exchange capable" for general surgery/gastroenterology. This multi-scenario versatility is the Chiba needle's greatest market advantage over dedicated cutting biopsy needles.
