Reusable vs single-use energy devices: building the MISeal TCO model
A total-cost modelling guide for OR procurement and value-analysis teams, current as of September 2026. It contains no list prices, no supplier pricing and no hospital-specific recommendation; all figures are inputs the reader supplies.…
A total-cost modelling guide for OR procurement and value-analysis teams, current as of September 2026. It contains no list prices, no supplier pricing and no hospital-specific recommendation; all figures are inputs the reader supplies.
The reusable-versus-single-use question is usually argued with unit prices, and unit prices are the least informative part of the answer. A reusable instrument carries purchase cost, repair cost, reprocessing cost and a lifespan; a single-use device carries purchase cost and nothing else, until you count the inventory, storage and disposal behind it. The model that answers the question is built from those streams, not from the price on a purchase order.
The real total-cost question
What makes this comparison difficult is that the two options distribute cost differently. The single-use option front-loads nothing: its cost appears per case, in a line that is easy to see and easy to attribute. The reusable option concentrates cost at purchase and in the reprocessing loop, where the individual case cost is real but rarely posted against a case.
Total cost of ownership modelling exists to put the two on the same footing. It does not produce a universal answer ¡ª the answer depends on case volume, reprocessing cost, repair rates and the facility’s own constraints ¡ª but it produces a defensible one when the inputs come from the facility rather than from a supplier’s comparison sheet.
Cost streams: reusable devices
| Stream | What it includes | Where the number comes from |
|---|---|---|
| Purchase | Unit price and the initial inventory needed to cover a full list | Quotations and the planned case volume |
| Repair and refurbishment | Failure rate, repair cost, turnaround, and the inventory held to cover it | Your own repair history, or the provider’s data |
| Reprocessing | Labour, consumables, water and energy, plus the equipment’s depreciation | Sterile-processing cost per tray, if your facility calculates one |
| Lifespan and replacement | How many uses the instrument is validated for, and what replaces it | Manufacturer documentation |
| Inventory holding | The capital tied up in covering repair and reprocessing cycles | Your inventory records |
Cost streams: single-use devices
The single-use side is simpler to model but not always as simple as it looks. The dominant stream is the per-case price, multiplied by projected case volume. Around it sit three secondary streams that are easy to omit: storage and handling for the stock that has to be on hand, wastage from expired or damaged items, and the supply risk of depending on a single consumable line.
Two further considerations belong in the model because they change behaviour rather than arithmetic. Single-use devices remove the reprocessing loop entirely, which frees capacity in sterile processing and reduces the repair and inventory workload. And they remove a variation ¡ª the condition of a reprocessed instrument ¡ª which is a quality consideration rather than a cost line, but one that value-analysis teams increasingly include.
Where a MISeal-class family sits in the model
For a facility evaluating a reusable instrument family such as the MISeal class, the model applies without modification. The purchase stream is the family’s capital and initial inventory; the repair stream is the family’s failure and refurbishment pattern, which your own records or the provider’s data describe; and the reprocessing stream is the facility’s, because it is the facility that sterilizes, stores and transports the instruments between cases. The single-use comparison column is then whichever consumable alternative the clinical team uses for the same cases.
What the class does not change is the shape of the answer. The crossover between the two options still depends on case volume and on the reprocessing and repair costs you can measure, which is why the model is built from facility inputs rather than from a device family’s specification.
Building the comparison model
- Fix the case volume: annual cases, and the number of devices used per case.
- Establish the reusable side’s cost per use, including reprocessing and the expected repair rate.
- Establish the single-use side’s cost per case, including wastage.
- Add the inventory capital on each side, expressed as the stock needed to run the service.
- Add the facility costs that change with the choice ¡ª sterile-processing capacity, storage, disposal.
- Test the model at low, expected and high volume, and see whether the answer changes.
- Record the assumptions, because the number is only as good as the inputs.
Two worked scenarios
Worked examples are useful only if they are labeled as examples, so the two below are described as shapes rather than as numbers. Both use the same structure and differ in volume.
| Scenario | What drives the outcome | Where the risk sits |
|---|---|---|
| High-volume, stable case mix | Reusable unit cost amortises over many uses; reprocessing capacity becomes the constraint | Repair turnaround and the inventory needed to cover it |
| Lower-volume or variable case mix | Reusable inventory sits idle between cases; per-case cost stays high | Capital tied up in instruments that are not being used |
The point of running both is that the crossover depends on volume, and volume is the input a facility knows best. A model that produces one answer regardless of volume is not a model; it is a preference with arithmetic attached.
Beyond cost: what changes in your OR
Three non-cost consequences belong in the decision record. Reprocessing capacity: moving to reusables consumes sterile-processing time and equipment that may already be at its limit. Continuity: a reusable fleet needs repair channels and spare inventory, while a single-use programme needs a supply chain that holds up. And change management: switching either way changes what the clinical team handles, what the store holds and what the documentation looks like.
Where those consequences are material, they should be stated in the business case alongside the cost comparison, because a decision that is cheaper on paper and infeasible in practice is not a saving.
Questions buyers ask
Which option is cheaper?
There is no universal answer. The crossover depends on case volume, reprocessing cost, repair rates and the inventory each option requires ¡ª all of which are facility-specific. The model exists to make those inputs visible rather than to supply a default.
Can we use a supplier’s comparison calculator?
As a starting point, provided you can see and change the assumptions. Where the inputs cannot be inspected, the output is a sales argument rather than a model.
What if we do not know our reprocessing cost per use?
Estimate it from labour, consumables and equipment time, and state it as an assumption. An explicit estimate with a sensitivity test is more useful than leaving the stream out of the model entirely.
Build the model from your own inputs, test it at three volumes, and record the assumptions. If you are sourcing energy devices and want the documentation that travels with them, ask HHG for the records on a specific item, or browse the current listings. Related reading: a procurement guide to radiofrequency and ablation systems and how ASCs use reposable energy shears.
