PTC Needle Gauge, Length & Clinical Selection For Hospital Purchase
Jul 06, 2026
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Gauge ↔ Metric Quick Reference
|
Gauge |
OD (mm) |
Typical Use |
|---|---|---|
|
18G |
1.20 |
PTCD exchange sheath, large cyst drainage |
|
19G |
1.06 |
PTCD primary (if ducts >6 mm) |
|
20G |
0.90 |
Cyst / pseudocyst aspiration |
|
21G |
0.80 |
FNA + PTC first-pass (good duct dilation) |
|
22G |
0.70 |
Classic PTC first-pass & thyroid/lymph FNA |
|
23G |
0.64 |
Superficial FNA (thyroid nodule <1 cm, small LN) |
Length Selection
15 cm: Superficial / pediatric / neck / breast
18–20 cm: Standard adult abdominal (liver, kidney, retroperitoneum), PTCD
22–30 cm: Obese patients, deep pancreatic or atypical approaches
Application-Based Recommendations
|
Application |
Gauge |
Length |
Notes |
|---|---|---|---|
|
PTC first-pass (dilated ducts) |
21G–22G |
15–20 cm |
Minimal bleed risk |
|
PTCD micro-puncture |
22G Chiba → exchange 18G–20G |
20 cm |
Micro-puncture kit std |
|
Cyst / abscess aspiration |
19G–21G |
15–20 cm |
Larger lumen aids viscous fluid |
|
Thyroid / cervical LN FNA |
22G–23G |
2.5–4 cm or 15 cm |
Short fine needle reduces hematoma |
|
Lung nodule CT-FNA |
21G–22G |
15–20 cm |
Adjust per depth & emphysema |
|
Retroperitoneal FNA |
21G–22G |
20–22 cm |
May use coaxial technique |
|
Seed implant / interventional |
18G (NiTi if MR) |
15–20 cm |
Matches seed applicator |
Material & Feature Options
- SUS304 / SUS316L: Cost-effective, rigid, radiopaque
- NiTi (Nitinol): Flexible, non-ferromagnetic → MRI-compatible
- Echogenic tip (etched ring / coating): Improves tip visibility on ultrasound - recommended for US-guided units
- Depth markings / sliding cursor: Laser-etched 5/10 mm marks + sliding stop aid depth control
- Sterility: EO sterilized, individually Tyvek packed, single-use only
Brand & Regulatory Check
Imported: Hakko PTC-B/D, Cook Medical, BD Angiographic
Domestic: Must hold NMPA Class III registration covering "percutaneous biopsy" / "biliary puncture"
ISO 13485 certified; request batch COA (dimensional & puncture force data)
Rule of thumb: Start with 22G × 20 cm SUS304 Chiba with echo tip + depth marks as the universal baseline; supplement with 18G PTCD exchange sets and 23G superficial FNA needles per specialty needs.
