(116 days)
The single-use safety lancets are hand-held disposable devices intended to achieve a controlled skin puncture, typically on the fingertip, to obtain a capillary blood specimen.
The Unistik® 3 sterile single-use safety lancets and Abbott SF sterile single-use safety lancets are hand-held disposable devices intended to be used to achieve a controlled skin puncture on the fingertip, in order to obtain a capillary blood specimen. The Unistik® 3 sterile single-use safety lancets and Abbott SF sterile single-use safety lancets are indicated for use where a capillary blood specimen is required for the purposes of performing in-vitro diagnostic (IVD) assays, e.g. for blood glucose monitoring in patients with diabetes.
The Unistik® 3 safety lancets are available in five different variants, each with a different needle gauge (18G, 21G, 23G, 28G, 30G) to facilitate appropriate blood flow rates from the skin puncture. There are two high flow variants (18G, 21G) one medium flow variant (23G) and two low flow variants (28G, 30G). The Unistik® 3 Value devices are identical to the equivalent gauge of Unistik® 3 devices, except for the colour of the plastic body housings. The Unistik® 3 Value devices all have a vanilla body housing colour, whereas the Unistik® 3 devices have a different colour for each gauge.
The Abbott SF sterile single-use safety lancets are available in a single configuration only (28G needle).
The Unistik® 3 sterile single-use safety lancets and Abbott SF sterile single-use safety lancets are designed for prescription and over-the-counter use and to be used by self-testing patients, caregivers and healthcare professionals. The devices are designed to perform a controlled skin puncture on the fingertip, in order for care-givers and healthcare professionals to obtain capillary blood specimens from patients for IVD assays, and also for lay (home) users to be able to perform a skin puncture on themselves where an IVD self-testing regime is required. The intended user population includes male and female, right or left-handed self-administering patients, care givers and healthcare professionals. The frequency of use and intended patient population is dependent on the given diagnostic regime.
The Unistik® 3 sterile single-use safety lancets and Abbott SF sterile single-use safety lancets are sterile single-use devices with integral sharps protection whereby the lancet needle is shielded before and after use to prevent needlestick injuries, so mitigating the hazard of transmission of blood-borne infectious agents. Furthermore, the device automatically self-disables after a single use, thus preventing any hazards of re-use.
The Unistik® 3 sterile single-use safety lancets and Abbott SF sterile single-use safety lancets are used by first twisting off the end cap, the needle tip is then exposed but remains safely shielded within the device housing. The user then presses the end face of the device against the sampling site, then activates the device by pressing the release button on the side of the lancet needle is then automatically propelled forward by the internal pre-loaded spring to lance the skin and also automatically retracted by the spring back inside the device housing, where it is then automatically locked to prevent re-use. After firing, the locked position of the needle tip inside the device ensures that it remains safely shielded, and the device can be safely disposed of into an appropriate sharps receptacle.
The Unistik® 3 sterile single-use safety lancets and Abbott SF sterile single-use safety lancets consist of a stainless steel lancet needle moulded into a plastic lancet holder component. which in turn is assembled into a moulded plastic outer housing with a pre-loaded steel spring for propelling the lancet holder forward when the device is activated and subsequently automatically retracting it. After retraction, the lancet holder is automatically locked into the device such that the device cannot be re-used and the needle tip is safely shielded.
The lancet needles are moulded into the lancet holder component such that the needle tip is sealed by complete encapsulation in overmoulded plastic. The complete lancet holder component is then sterilised by gamma irradiation, so after irradiation the sterility of the needle tip is maintained by encapsulation within the plastic. The sterile seal is only broken when the user twists off and removes the lancet cap immediately before use. The needle tip is the exposed needle length after the cap is removed, and this is the only part of the needle that will penetrate the patient's skin during use. Therefore, the encapsulation of the needle tip by plastic overmoulding performs the function of primary packaging, whereby a sterile seal is maintained until the point of use.
The provided text describes a 510(k) premarket notification for a medical device (Unistik® 3, Unistik® 3 Value, and Abbott SF sterile single-use safety lancets), not an AI/ML powered device. As such, information regarding AI/ML specific criteria like MRMC studies, standalone algorithm performance, number of experts for ground truth, or training set details are not applicable and are not present in the document.
The document focuses on demonstrating substantial equivalence to a predicate device through bench testing and compliance with relevant standards for a traditional medical device (blood lancets).
Below is the information regarding the acceptance criteria and study as presented in the document for the non-AI medical device.
1. Table of acceptance criteria and the reported device performance
| Test | Requirement | Reported Device Performance |
|---|---|---|
| Integrity of device | Internal test specification | Meets specification |
| Test firing protocol | Internal test specification | Meets specification |
| Environmental testing | Internal test specification | Meets specification |
| Cap removal torque and needle retention | Internal test specification | Meets specification |
| Needle penetration measurement | Internal test specification | Meets specification |
| Drop test | Internal test specification | Meets specification |
Additionally, the document states: "All additional performance tests met the acceptance criteria."
2. Sample size used for the test set and the data provenance
The document does not specify the exact sample sizes used for each of the bench tests mentioned. The "data provenance" (e.g., country of origin of the data, retrospective or prospective) is also not explicitly stated, but the tests were conducted as part of the design verification for the devices by the manufacturer, Owen Mumford Ltd (United Kingdom). These would be considered prospective design verification tests.
3. Number of experts used to establish the ground truth for the test set and the qualifications of those experts
This question is not applicable as the device is a physical medical device (lancet), not an AI/ML diagnostic system requiring expert-established ground truth for a test set. The acceptance criteria are based on internal test specifications and engineering requirements.
4. Adjudication method (e.g. 2+1, 3+1, none) for the test set
This question is not applicable for a physical medical device where performance is evaluated through objective bench tests against technical specifications.
5. If a multi reader multi case (MRMC) comparative effectiveness study was done, If so, what was the effect size of how much human readers improve with AI vs without AI assistance
This question is not applicable as the device is a physical medical device (lancet) and does not involve AI or human readers for diagnostic interpretation.
6. If a standalone (i.e. algorithm only without human-in-the loop performance) was done
This question is not applicable as the device is a physical medical device (lancet) and does not involve an algorithm.
7. The type of ground truth used (expert concensus, pathology, outcomes data, etc)
For the bench tests, the "ground truth" or reference against which the device performance was measured were the internal test specifications. These specifications define the expected performance parameters (e.g., integrity, firing protocol, cap removal torque, needle penetration depth, environmental resilience, drop test). Biocompatibility was assessed against ISO 10993-1, and sterility against ISO 11137 with a Sterility Assurance Level (SAL) of 10^-6.
8. The sample size for the training set
This question is not applicable as the device is a physical medical device (lancet) and does not involve a "training set" in the AI/ML context.
9. How the ground truth for the training set was established
This question is not applicable as the device is a physical medical device (lancet) and does not involve a "training set" or "ground truth" for training purposes.
§ 878.4850 Blood lancets.
(a)
Single use only blood lancet with an integral sharps injury prevention feature —(1)Identification. A disposable blood lancet intended for a single use that is comprised of a single use blade attached to a solid, non-reusable base (including an integral sharps injury prevention feature) that is used to puncture the skin to obtain a drop of blood for diagnostic purposes. The integral sharps injury prevention feature allows the device to be used once and then renders it inoperable and incapable of further use.(2)
Classification. Class II (special controls). The special controls are:(i) The design characteristics of the device must ensure that the structure and material composition are consistent with the intended use and must include a sharps injury prevention feature.
(ii) Mechanical performance testing must demonstrate that the device will withstand forces encountered during use and that the integral sharps injury prevention feature will irreversibly disable the device after one use.
(iii) The device must be demonstrated to be biocompatible.
(iv) Sterility testing must demonstrate the sterility of any device component that breaches the skin (
e.g., blade).(v) Labeling must include:
(A) Detailed descriptions, with illustrations, of the proper use of the device and its sharps injury prevention feature.
(B) Handwashing instructions for the user before and after use of the device.
(C) Instructions on preparation (
e.g., cleaning, disinfection) of the skin to be pierced.(D) Instructions for the safe disposal of the device.
(E) Labeling must be appropriate for the intended use environment.
(
1 ) For those devices intended for health care settings, labeling must address the health care facility use of these devices, including how these lancets are to be used with personal protective equipment, such as gloves.(
2 ) For those devices intended for use in the home, labeling must be written so that it is understandable to lay users.(vi) Labeling must also include the following statements, prominently placed:
(A) “For use only on a single patient. Discard the entire device after use.”
(B) “Warning: Not intended for more than one use. Do not use on more than one patient. Improper use of blood lancets can increase the risk of inadvertent transmission of bloodborne pathogens, particularly in settings where multiple patients are tested.”
(b)
Single use only blood lancet without an integral sharps injury prevention feature —(1)Identification. A disposable blood lancet intended for a single use that is comprised of a single use blade attached to a solid, non-reusable base that is used to puncture the skin to obtain a drop of blood for diagnostic purposes.(2)
Classification. Class II (special controls). The special controls are:(i) The design characteristics of the device must ensure that the structure and material composition are consistent with the intended use and address the risk of sharp object injuries and bloodborne pathogen transmissions.
(ii) Mechanical performance testing must demonstrate that the device will withstand forces encountered during use.
(iii) The device must be demonstrated to be biocompatible.
(iv) Sterility testing must demonstrate the sterility of any device component that breaches the skin (
e.g., blade).(v) Labeling must include:
(A) Detailed descriptions, with illustrations, of the proper use of the device.
(B) Handwashing instructions for the user before and after use of the device.
(C) Instructions on preparation (
e.g., cleaning, disinfection) of the skin to be pierced.(D) Instructions for the safe disposal of the device.
(E) Labeling must be appropriate for the intended use environment.
(
1 ) For those devices intended for health care settings, labeling must address the health care facility use of these devices, including how these lancets are to be used with personal protective equipment, such as gloves.(
2 ) For those devices intended for use in the home, labeling must be written so that it is understandable to lay users.(vi) Labeling must also include the following statements, prominently placed:
(A) “For use only on a single patient. Discard the entire device after use.”
(B) “Warning: Not intended for more than one use. Do not use on more than one patient. Improper use of blood lancets can increase the risk of inadvertent transmission of bloodborne pathogens, particularly in settings where multiple patients are tested.”
(c)
Multiple use blood lancet for single patient use only —(1)Identification. A multiple use capable blood lancet intended for use on a single patient that is comprised of a single use blade attached to a solid, reusable base that is used to puncture the skin to obtain a drop of blood for diagnostic purposes.(2)
Classification. Class II (special controls). The special controls are:(i) The design characteristics of the device must ensure that:
(A) The lancet blade can be changed with every use, either manually or by triggering a blade storage unit to discard the used blade and reload an unused blade into the reusable base; and
(B) The structure and material composition are consistent with the intended use and address the risk of sharp object injuries and bloodborne pathogen transmissions and allow for validated cleaning and disinfection.
(ii) Mechanical performance testing must demonstrate that the device will withstand forces encountered during use.
(iii) The device must be demonstrated to be biocompatible.
(iv) Sterility testing must demonstrate the sterility of any device component that breaches the skin (
e.g., blade).(v) Validation testing must demonstrate that the cleaning and disinfection instructions are adequate to ensure that the reusable lancet base can be cleaned and low level disinfected.
(vi) Labeling must include:
(A) Detailed descriptions, with illustrations, of the proper use of the device.
(B) The Environmental Protection Agency (EPA) registered disinfectant's contact time for disinfectant use.
(C) Handwashing instructions for the user before and after use of the device.
(D) Instructions on preparation (
e.g., cleaning, disinfection) of the skin to be pierced.(E) Instructions on the cleaning and disinfection of the device.
(F) Instructions for the safe disposal of the device.
(G) Instructions for use must address the safe storage of the reusable blood lancet base between uses to minimize contamination or damage and the safe storage and disposal of the refill lancet blades.
(H) Labeling must be appropriate for the intended use environment.
(
1 ) For those devices intended for health care settings, labeling must address the health care facility use of these devices, including how these lancets are to be used with personal protective equipment, such as gloves.(
2 ) For those devices intended for use in the home, labeling must be written so that it is understandable to lay users.(vii) Labeling must also include the following statements, prominently placed:
(A) “For use only on a single patient. Disinfect reusable components according to manufacturer's instructions between each use.”
(B) “Used lancet blades must be safely discarded after a single use.”
(C) “Warning: Do not use on more than one patient. Improper use of blood lancets can increase the risk of inadvertent transmission of bloodborne pathogens, particularly in settings where multiple patients are tested. The cleaning and disinfection instructions for this device are intended only to reduce the risk of local use site infection; they cannot render this device safe for use for more than one patient.”
(d)
Multiple use blood lancet for multiple patient use —(1)Identification. A multiple use capable blood lancet intended for use on multiple patients that is comprised of a single use blade attached to a solid, reusable base that is used to puncture the skin to obtain a drop of blood for diagnostic purposes.(2)
Classification. Class III (premarket approval).(3)
Date PMA or notice of completion of a PDP is required: A PMA or a notice of completion of a PDP is required to be filed with the Food and Drug Administration on or before May 22, 2024, for any multiple use blood lancet for multiple patient use described in paragraph (d)(1) of this section that was in commercial distribution before May 28, 1976, or that has, on or before May 22, 2024, been found to be substantially equivalent to a multiple use blood lancet for multiple patient use described in paragraph (d)(1) of this section that was in commercial distribution before May 28, 1976. Any other multiple use blood lancet for multiple patient use shall have an approved PMA or a declared completed PDP in effect before being placed in commercial distribution.