Adjustable lancet and test cartridge for automated medical sample collection and testing
A test cartridge includes an adjustable lancet. The adjustable lancet is controlled by a controller. The adjustable lancet automatically detects a subject's finger, adjusts the lancet's height, pricks the finger to draw blood, moves a tube to collect the blood, moves the tube away from the finger, and empties the blood from the tube into a vial or receptacle. The adjustable lancet may include safety features to prevent the lancet to trigger when the subject's fingernail is facing the lancet, to control the amount that the lancet pierces the subject's finger, and/or to prevent the reuse of a test cartridge for multiple persons or multiple times by the same person. The adjustable lancet may include a massager wheel and/or a pressure bar to rub the subject's finger after the finger is pierced to facilitate drawing of the blood from the finger.
1 . A sample collection and testing device, comprising:
a processor;
a lancet;
a lancet housing encompassing the lancet;
a massager wheel;
a first shaft connected to the massager wheel;
a pressure bar; and
a second shaft connected to the pressure bar;
wherein the processor is configured to:
move the lancet housing by an incremental distance;
determine that the lancet housing has not touched the finger of the person;
repeat the moving of the lancet housing by the incremental distance until determining that the lancet housing has touched the finger; and
move the lancet housing away from the finger by a predetermined distance to relieve pressure on the finger;
trigger the lancet to prick a finger of a person;
swing, after triggering the lancet, the first shaft in a pendulum like movement to make one or more contacts between the massager wheel and the finger at a location close to an area on the finger that is pricked by the lancet; and
move the second shaft toward and away from the finger one or more times to apply pressure to a side of the finger.
2 . The sample collection and testing device of claim 1 further comprising:
a servo motor,
wherein the processor is configured to control the first shaft by the servomotor.
3 . The sample collection and testing device of claim 1 , wherein a location of the first shaft and the pendulum like movement of the first shaft are configured such that the massager wheel touches the finger at a location close to where the finger is pricked.
4 . The sample collection and testing device of claim 1 , wherein the first shaft is configured to keep the massager wheel at a position where the massager wheel is near an area of the finger that is pricked by the lancet.
5 . The sample collection and testing device of claim 1 , wherein the massager wheel is covered with a flexible material comprising one of a rubber, silicone, foam, and plastic.
6 . The sample collection and testing device of claim 5 , wherein the flexible material is configured to deform to accommodate finger sizes of different persons.
7 . The sample collection and testing device of claim 1 further comprising:
a servo motor,
wherein the processor is configured to control the second shaft using the servomotor.
8 . The sample collection and testing device of claim 1 , wherein the pressure bar is covered with a flexible material comprising one of rubber, silicone, foam, and plastic.
9 . The sample collection and testing device of claim 1 , wherein the processor is configured to move the lancet away from the finger prior to moving the second shaft back and forth one or more times to apply pressure to a side of the finger.
10 . The sample collection and testing device of claim 1 , wherein the lancet, the massager wheel, and the pressure bar are in a disposable cartridge, and wherein the processor is reusable for a plurality of disposable cartridges.
11 . The sample collection and testing device of claim 1 , wherein the processor is configured to move the lancet away from the finger prior to swinging the first shaft to make the one or more contacts between the massager wheel and the finger.
12 . The sample collection and testing device of claim 1 further comprising:
a tube; and
a pump configured to cause blood to move in or out of the tube;
wherein the processor is configured to:
move the tube to touch the finger at a location in a vicinity of where the lancet pricks the finger; and
start the pump to pull in blood from the finger into the tube.
13 . The sample collection and testing device of claim 12 , wherein the processor is configured to:
stop the pump a period of time after starting the pump; and
move the tube away from the finger.
14 . The sample collection and testing device of claim 12 , wherein the processor is configured to:
move the tube to a receiving device; and
start the pump in a reverse direction to empty the blood from the tube into the receiving device.
15 . An automated method of massaging a finger after a lancet of a sample collection and testing device pricks the finger, the sample collection and testing device comprising a lancet housing encompassing the lancet, a massager wheel, a first shaft connected to the massager wheel, a pressure bar, and a second shaft connected to the pressure bar, the method comprising:
by a processor of the sample collection and testing device:
moving the lancet housing by an incremental distance;
determining that the lancet housing has not touched the finger of the person;
repeating the moving of the lancet housing by the incremental distance until determining that the lancet housing has touched the finger;
moving the lancet housing away from the finger by a predetermined distance to relieve pressure on the finger;
triggering the lancet to prick a finger of a person;
after triggering the lancet, swinging the first shaft in a pendulum like movement to make one or more contacts between the massager wheel and the finger at a location close to an area on the finger that is pricked by the lancet; and
moving the second shaft toward and away from the finger one or more times to apply pressure to a side of the finger.
16 . The automated method of claim 15 further comprising moving the lancet away from the finger by the processor of the sample collection and testing device prior to swinging the first shaft to make the one or more contacts between the massager wheel and the finger.
17 . The automated method of claim 15 further comprising moving the lancet away from the finger by the processor of the sample collection and testing device prior to moving the second shaft back and forth one or more times to apply pressure to a side of the finger.
18 . The automated method of claim 15 , the sample collection and testing device comprising a tube and a pump configured to cause blood to move in or out of the tube, the method further comprising:
by the processor of the sample collection and testing device:
moving the tube to touch the finger at a location in a vicinity of where the lancet pricks the finger; and
starting the pump to pull in blood from the finger into the tube.
19 . The automated method of claim 18 further comprising: by the processor of the sample collection and testing device:
stopping the pump a period of time after starting the pump; and
moving the tube away from the finger.
20 . The automated method of claim 18 further comprising: by the processor of the sample collection and testing device:
moving the tube to a receiving device; and
starting the pump in a reverse direction to empty the blood from the tube into the receiving device.