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This page describes products and general use; it is not medical advice.
A retractable scalpel is a surgical scalpel whose blade can be drawn back into the handle and locked there, so the cutting edge is covered when the instrument is not in use. This page is for clinic staff, safety officers and students who need to know how the mechanism works, which designs exist, and how OSHA’s bloodborne pathogens standard treats safety scalpels.
What a retractable scalpel is
A retractable scalpel is a scalpel with a built-in mechanism that moves the blade between an exposed position and a protected position inside the handle. It is one kind of safety scalpel. The basic scalpel and its blade numbering are covered in what a scalpel is.
Who uses it: clinicians and procedure staff who handle scalpels, and the safety officers who choose sharps controls under OSHA’s bloodborne pathogens standard.
OSHA’s standard (29 CFR 1910.1030) defines “sharps with engineered sharps injury protections” as “a nonneedle sharp or a needle device used for withdrawing body fluids, accessing a vein or artery, or administering medications or other fluids, with a built-in safety feature or mechanism that effectively reduces the risk of an exposure incident.” A scalpel is a nonneedle sharp, so a scalpel whose blade retracts and locks is the kind of device this definition addresses. (Source: OSHA, 29 CFR 1910.1030(b).)
How the blade retracts and locks
Two manufacturer instructions for use (IFUs) show how different the mechanisms can be.
- Slide-latch, top-activated. The Techno Cut Plus IFU (HMD Healthcare, revision July 2025) describes the product as “Top Activated – Retractable – Lockable – Single Use”. The user pushes the slide latch forward until it clicks to extend the blade. To retract, the user pulls the latch back until it clicks and visually checks that the blade is fully retracted. After use, the latch is pulled further back with force until it clicks into the final lock position, at which point the scalpel is ready for disposal.
- Pen-style, press-release. The TIDI PenBlade Safety Scalpel IFU (44U00174 Rev 01, 2024-08-16) describes “a mechanism to extend and retract a blade between an exposed and a retracted safe position”. It is sold with 10, 11P or 15 blades.
Types and variants
The table compares two products with published IFUs. It illustrates two designs and is not a survey of the market.
| Design | Source product | How the blade moves | Reuse |
|---|---|---|---|
| Top-activated slide latch with final lock | Techno Cut Plus (HMD Healthcare IFU, rev. July 2025) | Slide latch pushed forward to extend, pulled back to retract, pulled further back to a final lock position | Single use; do not resterilise; supplied sterile (ethylene oxide) |
| Pen-style, press-release | TIDI PenBlade Safety Scalpel (IFU 44U00174 Rev 01, 2024-08-16) | Mechanism extends and retracts the blade between an exposed and a retracted safe position | Sterile, single use; do not re-sterilise or reuse |
Sizes that the IFU states
The PenBlade IFU states that the scalpel is “available in three scalpel sizes; 10, 11P, or 15 blades”, with model numbers PBS513 and PBS715 covered by the document. Its intended use is “incision of human skin or tissue or the cutting of sutures and catheters up to 6Fr.” For what the common blade numbers are used for, see the 10 blade vs 15 blade comparison.
How to choose: the criteria OSHA states
The bloodborne pathogens standard does not name a preferred scalpel. It sets the process an employer follows, and these points come directly from the standard and OSHA’s 2004 letter of interpretation on safety scalpels.
| Criterion | What the source says | Source |
|---|---|---|
| Engineering controls first | “Engineering and work practice controls shall be used to eliminate or minimize employee exposure.” | 29 CFR 1910.1030(d)(2)(i) |
| Annual review of safer devices | The exposure control plan is reviewed and updated at least annually and must “document annually consideration and implementation of appropriate commercially available and effective safer medical devices designed to eliminate or minimize occupational exposure.” | 29 CFR 1910.1030(c)(1)(iv) |
| Employee input | The employer “shall solicit input from non-managerial employees responsible for direct patient care who are potentially exposed to injuries from contaminated sharps” when identifying, evaluating and selecting controls, and document that in the plan. | 29 CFR 1910.1030(c)(1)(v) |
| Market availability | Market availability is a limiting factor; where a control is commercially available and feasible, it must be used. | OSHA letter, 1 Sept 2004 |
| Patient safety | If a safety scalpel compromises patient safety, its use would not be considered feasible. | OSHA letter, 1 Sept 2004 |
| Documenting non-use | A site that does not use safety scalpels must specifically address that non-use in its exposure control plan. | OSHA letter, 1 Sept 2004 |
The exposure control plan itself is explained in the bloodborne pathogens exposure control plan for hospitals.
Safe use and handling basics
These points come from the two IFUs. Always follow the IFU supplied with the product in use.
- Check the sterile barrier and the Use By date. Do not use the device if the package or device is damaged. (PenBlade IFU)
- Single-use only: do not re-sterilise or reuse. Do not autoclave the device or expose it to organic solvents. (PenBlade IFU; Techno Cut Plus IFU also says “Do NOT resterilise.”)
- Always retract the blade to the safe position when the scalpel is not in use. (PenBlade IFU)
- After use, retract the blade to the safe position and put the device in a sharps or biohazard container. (PenBlade IFU) For Techno Cut Plus, retract and then move the latch to the final lock position before disposal.
Container sizes and OSHA’s container rules are in sharps container dimensions, and what happens to the container afterwards is in red bag waste.
Common mistakes
- Forcing a jammed button. The PenBlade IFU says: “If the extension button is jammed, do not force the scalpel blade to extend.”
- Leaving the blade out between uses. The IFU instructs staff to retract it whenever the scalpel is not in use.
- Skipping the visual check or the final lock. The Techno Cut Plus IFU asks the user to confirm the blade is fully retracted and to lock the latch before disposal.
- Reprocessing a single-use device. Both IFUs prohibit resterilising.
- Not documenting the decision. A site that does not use safety scalpels must say why in its exposure control plan.
FAQ
Is a retractable scalpel the same as a safety scalpel?
A retractable scalpel is one type of safety scalpel: its safety feature is a blade that retracts into the handle. OSHA’s definition of engineered sharps injury protection covers any built-in safety feature that effectively reduces the risk of an exposure incident.
Does OSHA require safety scalpels?
OSHA requires engineering controls to eliminate or minimize exposure and requires annual documentation of safer devices. Its 2004 letter says that where a safety scalpel is commercially available and feasible it must be used, and that it is not feasible if it compromises patient safety. A site not using one must address that in its exposure control plan.
Can a retractable scalpel be reused?
The Techno Cut Plus and PenBlade IFUs describe single-use, sterile devices and say not to re-sterilise them.
Sources
All sources checked on 2026-10-30.
- OSHA, 29 CFR 1910.1030, Bloodborne pathogens: https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1030
- OSHA letter of interpretation, 1 September 2004, “Limiting factors for implementing the use of engineering controls, i.e., safety scalpels, under the Bloodborne Pathogens standard”: https://www.osha.gov/laws-regs/standardinterpretations/2004-09-01
- HMD Healthcare, Techno Cut Plus instructions for use, rev. July 2025: https://hmdhealthcare.com/wp-content/uploads/2025/10/IFU-TECHNO-CUT-PLUS.pdf
- TIDI Products, PenBlade Safety Scalpel instructions for use, 44U00174 Rev 01, 2024-08-16: https://www.tidiproducts.com/hubfs/ifu/penblade-safety-scalpel/44U00174%20Rev%2001%20PenBlade%20IFU%20PBS513%20PBS715.pdf
