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Item #User Needs, Intended UsesDesign Inputs (Technical Requirements)Acceptance CriteriaDesign OutputsDesign Verification (Outputs = Inputs)Design Validation (User Needs Met)
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Ideal/GoalLimit
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Microneedles (MNs)
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1Customer Requirements (e.g. Functional)PMA, ISO, 510k standrads being met/not
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1.1MNs must not accidentally hurt the userMNs must not be exposed before or after usePainless procedureSkin visibly red swollen3D printed model showing needles being covered before use and resheathed after use99.99% of MNs produced are successfully covered before and after useClinical trials result in an injury rate within industry requirements
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1.2Device is easily reusableAfter each use, the used MN can be ejected and a new one can be attached in under 1 minuteMNs can be ejected and replaced within 1 minuteMNs can be ejected and replaced within 3 minutesThe device will have a snapping mechanism for new MN attachement, and a button for MN ejection after use99.99% of MNs are successfully attatchable and ejectableClinical trials show that trained users can eject and attach a microneedle under 1 minute
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2Product Performance Requirements (e.g. Mechanical)
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2.1Minimally invasiveMNs will not puncture the skin beyond 1800 umSkin appears normal/ redness disappear withing 5mins after applicationSkin redness persists after 3-5hoursUpscaled CAD model and printing of MNs100% of MNs are measured to be less than 1800 umAnimal and cadaver studies validate that needles do not puncture beyond 1800 um
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2.2MNs are secure against skinDevice holds MNs down against skin so the they are fully inserted MN patch does not come off unless physically peeled offMN patch comes off due to slight arm movementPrototype of device with a mechanism for MN deployment that allows for MNs to be held in position until released99.99% MNs adhere to skin upon application due to elastic nature of skin (closes in on MNs). perforation depth, and number (many MNs)Animal and cadaver studies demonstrate secure MN to skin contact
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2.3MNs are able to draw blood after being inserted into skinMN length/depth is between 1500- 1800 um, vacuum sealed for suction of at least 100 uL of bloodMNs draw >100uL blood MNs draws between 80 -100uL blood minimumUpscaled CAD model and printing of MNs100% of MNs are between 1500-1800 um in length and vacuum pressure is able to draw at least 100 uL of blood in 99.99% of testsClinical trials demonstrate that MNs can draw an appropriate volume of blood
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2.4MNs withstand force of being insertedNo MNs break upon puncturing and removal from skinMNs never break during blood drawing, storage, or transport0.01% of MNs fail to pass the durablity testMNs are made of stainless steel99.99% of MNs do not experience anny breakage upon inserertion and removal from skin Animal and cadaver studies validate MN durability
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3Biocompatability Requirements
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3.1MNs are sterile and hypoallergenicMN material and packaging must be resistant to degradation and pathogensMNs do not cause any reaction on patient skinSkin redness persists after 3-5 hoursMNs will be made of stainless steel. They will arrive in uncompromised vaccuum-sealed packaging. 99.99% of MNs arrive in uncompromised packaging. 99.99% of pathogen tests are negativeAnimal and clinical studies to verify biocompatability
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Masager
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1Customer Requirements (e.g. Functional)
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1.1Device massages skin to increase blood flowDevice will vibrate at a frequency between 30-50 HzDevice vibrates between 30-50HzDevice vibratation is +/- 5 HzPrototype with motor that allows massager to moveVibration testing shows that vibrations between 30-50 Hz can be consistently produced during the device's lifetimeAnimal and clinical studies demonstrate increased blood flow after vibrations
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1.2.Device heats skin to increase blood flow Device will contain a non-flammable heating pad that can produce adjustable temperatures between 40-50 degrees CDevice can be heated to between 40-50 degrees CDevice heating is +/- 5 degreesPrototype with insulative fabric heating pad and 3D-printed CAD model of a heating systemHeating pad temperature is measured to be within 40-50 degrees C during the device's lifetimeTemperatures are clinically shown to dilate blood vessels without damaging the skin barrier or causing pain
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1.3Device can easily be secured to patient's arm or moved by the user Device does not detatch from patient's arm when secured. Device does not detatch from user's hand when secured. Device can be secured within 30 secondsDevice can be secured within 30 seconds and remains in placeDevice moves or detaches with considerable movementDevice will have a velcro strap that can be used to secure the device to the patients arm, or reversed so the device is secured to the user's hand for easy movement Standard velcro strap tested for force tolerance and provides secure attachments and easy removalClinical studies verify that trained users can easily secure the device to their hand or the patient's arm
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2Product Performance Requirements (e.g. Mechanical)
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2.1Durability: Device can withstand rigors of daily useDevice can be used daily for 5 years without replacement Device never compromised during its guaranteed lifetimeDevice does not meet efficiency standard set during manufacture while in useSketches, CAD model and 3D printing of a sturdy device designAccelerated life test is performed to simulate 5 years of useClinical studies verify that device can be used daily for 5 years
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2.2Portability: device must be compact and portable and lightweight to promote ease in transportation under different settings Device must be 3lbs or less and smaller than 6in x 6in.Device is under 3lbs and smaller than 6in x 6inDevice weighs 3.5 pounds, is smaler than 7in x 7inSketches, CAD model of device casing, 3D printed prototype99.99% of devices will be measured and weighed and must fall within the specificaitonsClinical studies verify that users are able to transport the device as needed
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4Regulatory Requirements
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4.1As a class II device, the product should be cleared through the 510(k) processThe device passes the 510(k) processDevice passes the 510(k) processN/ADescription of the device's intended use and indication for useClearing through the 510(k) processDevice passes the 510(k) clearning process
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4.2Meet general FDA labeling
requirements
The device meets FDA labeling requirementsDevice meets FDA labeling requirementsN/ADetailed Labelling specifications Detailed Labelling specificationsDevice meets FDA labeling requirements
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4.3Undergo mandatory performance standardsThe device is tested and meets mandatory performance standardsThe device is tested and meets mandatory performance standardsN/APerformance specificationsDevice is tested using standard procedures for a class II deviceDevice passes testing for a class II device
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5Interfaces with Other Systems
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5.1The microneedle and massager devices are able to be used together to improve blood drawingThe massager can be placed on the upper arm to increase blood flow while the microneedle draws blood from the lower armDevices can be used simultaneously or one after the otherDevices can be used one after the otherDetailed schematic including relevant dimensions and speciifcations Devices do not physically interfere with each other during testing, and each device is shown to function properly while in the presence of the other Clinical trials demonstrate successful blood drawing when devices are used together
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6Other
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6.1Detailed technical support of device is made available Provide a comprehensive user manual and 24/7 technical assistance hotline for the deviceAll customer needs can be resolved by customer support resources1% of support needs are not resolvedUser Manual User Manual and consumer support via calls and live chat on website 99% of customers report satisfaction with customer support
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6.2Efficient training for use must be provided to healthcare professionals The training program should have a maximum duration of 2 hours for healthcare professionals with blood draw experienceAll trainees are able to pass the training program95% of trainees are able to pass the training program2-hour training program for healthcare prfessionalsCurriculum is planned, practical and written tests are created to test essential knowledgeTrainees tested on their knowledge by practical demonstration and written quizzes are passed with 100% accuracy
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