Patented SNARECOIL™ 8 gauge × 4 inch bone marrow biopsy needle. The 8 G large-bore cannula is designed for high-volume core specimens — useful when the protocol calls for larger marrow tissue volume.
Caution: Federal (USA) law restricts this device to sale by or on the order of a physician.
The Ranfac RBN-84 is an 8 gauge × 4 inch single-use bone marrow biopsy needle in the patented SNARECOIL™ family. The 8 G cannula is the largest bore in the SNARECOIL™ line — designed for protocols where larger marrow tissue volume is preferred (e.g., specific research, cell-yield, or pathology workflows). The ergonomic handle includes a captive-mechanism lever for long, non-fragmented core recovery.
RBN-84 is the large-bore 8 G × 4 inch SNARECOIL™ configuration, selected when procedures require higher specimen volume or wider cores than the standard 11 G provides. The 6 inch RBN-86 extends the same gauge for deeper access.
Per 510(k) K983187: For procuring bone marrow core biopsies from patients with hematologic abnormalities. Per IFU 29024-01P: The Ranfac Bone Marrow Biopsy Needle is indicated for the surgical harvesting of bone marrow.
8 gauge × 4 inch SNARECOIL™ is selected when posterior iliac crest biopsy requires the largest available specimen volume — including specific cell-yield, immunohistochemistry, or research-grade tissue protocols. The captive SNARECOIL™ mechanism supports long, intact core recovery despite the large bore. Per the 29024-01P Rev J Instructions for Use, the device is contraindicated for sternal procedures.
8 G large-bore cannula for protocols requiring increased marrow tissue volume.
Lymphoma, leukemia, MDS, multiple myeloma workups requiring intact core specimens.
Long, non-fragmented cores suitable for immunohistochemistry, flow cytometry preparation, and research tissue protocols.
Long, intact cores reduce specimen-handling artifacts during fixation, sectioning, and immunohistochemistry — supporting accurate, reproducible reads.
Construction, regulatory, and packaging details. Gauge, length, cannula and stylet are listed in the hero above. For complete indications, contraindications, and warnings, download the Instructions for Use.
| Construction | Stainless steel cannula and stylet · medical-grade polymer ergonomic handle with capture lever |
|---|---|
| Connection | Proximal luer cap (optional luer-lock for aspirate syringe per IFU) |
| Sterilization | Ethylene oxide · single-use · latex-free |
| Packaging | Individually pouched |
| FDA Clearance | 510(k) K983187 (10 Dec 1998) · Class II · Product Code KNW |
| Prescription | Rx only (21 CFR 801 Subpart D) |
Summary only. The complete 25-step bilingual Instructions for Use (29024-01P Rev J), including contraindications, warnings, and specimen-retrieval technique, accompanies every device and is downloadable below.
Choose 8 G when a larger marrow specimen volume is needed — for example, specific cell-yield, immunohistochemistry, or research-grade tissue protocols. The 11 G RBN-114 is the more common diagnostic configuration. Site selection and bore choice are physician-determined per the IFU.
SNARECOIL™ is Ranfac's patented captive specimen-capture mechanism. A lever on the ergonomic handle engages the cannula tip to retain the marrow core during withdrawal.
Yes. Cleared under 510(k) K983187, Class II, Product Code KNW. Prescription use only.
No. The 29024-01P Rev J Instructions for Use explicitly contraindicates sternal procedures.
Yes. EO-sterilized, single-patient-use, not made with natural rubber latex.
Yes. Gauge, length, handle ergonomics, and packaging can be customized on the Ranfac single-source platform. Contact us.
Other configurations in the Ranfac Hematology family.
Have a clinical question, need samples for evaluation, or ready to purchase? Our product team typically responds within one business day.
Building a different device on the same platform? Ranfac runs custom OEM, CDMO, and CMO programs from concept through commercial. Talk to us about a custom configuration →
