An acceptance protocol for clinic buyers and biomedical teams evaluating a used Medtronic 90483 biopsy unit, current as of September 2026. It gives no procedural or clinical guidance, no repair instructions, and it makes no claim that HHG performs testing.
A biopsy unit is a simple device with a short acceptance checklist, and that is precisely why buyers skip it. The unit drives a needle or a gun; it either performs its function reliably or it does not; and the parts that touch the patient are single-use. The verification question is therefore narrow, but it is not optional, because a unit that fails at the point of use interrupts a booked procedure rather than merely disappointing a buyer.
What a biopsy unit acceptance covers
Acceptance for this class of equipment has four layers, and they run in a fixed order: confirm what the unit is, confirm it functions mechanically as intended, confirm the electrical safety position, and confirm the documentation and consumable records that support clinical use. Identity comes first because every other check depends on knowing which unit and which configuration you are verifying.
| Layer | What it establishes | Who performs it |
|---|---|---|
| Identity and SKU | Model, part number, serial and configuration match the sale documents | Receiving team |
| Mechanical function | The unit’s mechanism operates as the manufacturer describes | Qualified staff following the manufacturer’s instructions |
| Electrical safety | The unit passes the safety testing applicable to its class | Biomedical or qualified service |
| Documentation and consumables | Records, accessories and single-use items are complete and in date | Receiving team with biomedical review |
Identity and SKU checks
Read the model and serial from the unit rather than from the invoice, then confirm the variant. This class of device is sold in configurations that differ by the needles or the consumable interface they accept, and a unit listed correctly by model can still be the wrong variant for the consumables your clinic holds. Where the listing includes a part number, verify it against the unit label and against the manufacturer’s current catalogue description for that number.
- Model, part number and serial from the device label, photographed before unpacking further.
- Confirmation that the configuration matches the consumables the clinic intends to use.
- Invoice line describing the same unit and configuration.
- Any accessory or adaptor included, listed by part number.
Mechanical and function checks
Function testing belongs with qualified staff following the manufacturer’s instructions, and it should be documented as a test rather than described as an impression. What the check covers depends on the mechanism: operation of the firing or advancing action, the condition of any moving parts, and the integrity of the interface where the consumable attaches. Where the manufacturer’s procedure specifies a test method or a test fixture, use it ¡ª a function check performed differently from the documented procedure is a demonstration, not a verification.
Two condition findings deserve attention during the same inspection. Wear on the consumable interface suggests the unit has seen significant use, and any sign that the housing has been opened raises the question of who performed the work and why. Neither finding is automatically disqualifying, but both belong in the record with the seller’s explanation.
Needle and single-use records
Where the purchase includes single-use items, they are accepted on their own terms: within the labeled expiry, lot recorded, and sterile barrier intact. Check each item rather than a sample, because cartons from secondary-market purchases frequently contain mixed lots. Record the lot and expiry per item in a simple register, so that a future notice covering a particular lot can be matched to the units the clinic holds.
Where the purchase does not include consumables, confirm that the specific items the unit requires are obtainable, and price them before comparing the offer against another listing. A cheaper unit that requires a consumable your supplier cannot provide is not cheaper; the saving is temporary and the constraint is permanent for as long as the clinic keeps the equipment.
Service history and documents
Ask for the service history against the serial number, the electrical safety test record, and the labeling or instructions supplied with the unit. For used equipment, the useful question is not whether records exist but whether they refer to this unit: a service certificate without a serial number tells you that someone serviced something.
Where records are missing, price the gap rather than arguing about it. A unit without a documented safety test needs that test before it enters service, and the cost of arranging it ¡ª together with the time the unit sits unused while the test is arranged ¡ª is part of the purchase price rather than a negotiating point.
Accept or reject sheet
- Model, part number, serial and configuration recorded and matched to the invoice.
- Mechanical function verified by qualified staff per the manufacturer’s procedure.
- Housing condition and consumable interface inspected.
- Electrical safety testing completed or scheduled, with the certificate filed.
- Single-use items checked for lot, expiry and barrier integrity, per item.
- Consumable availability confirmed for the configuration purchased.
- Service history and documentation reviewed against the serial number.
- Decision recorded: accepted, conditionally accepted with a list, or rejected.
Questions buyers ask
Can we verify the unit ourselves?
The identity, documentation and consumable checks are within a receiving team’s scope. Mechanical function testing and electrical safety testing belong with qualified staff following the manufacturer’s procedure.
What matters most in the listing?
The configuration. Two units with the same model number can accept different consumables, and identifying that before purchase prevents a mismatch that only appears when a procedure is booked.
Is a unit without a service history acceptable?
Sometimes, at a price that reflects the verification you will commission. The safety test is not optional, so an undocumented unit is a unit plus a testing project.
Verify the configuration, test the function, and record the safety evidence. If you are evaluating a unit and want the documentation that travels with it, ask HHG for the records on a specific item, or browse the current diagnostic listings. Related reading: biopsy and trocar instruments explained.