Today’s medical application solutions are getting smaller, not in the sense of importance, but in size. Emergency medical equipment is decreasing in size in order to become portable and usable in the field before a patient ever reaches a hospital. On the spot treatment methods can help stabilize trauma patients and save lives.
For the armed services, field medicine is of critical importance. Soldiers do not have the benefit of full hospitals when they are in a battle zone; typically, they only have access to what medical personnel can carry on their backs or in a truck. Miniaturization has enabled medics to utilize more advanced equipment outside of hospitals to stabilize wounded soldiers and save lives. One particular component that has offered new breakthrough is compact, high torque DC gear motors and DC micro motors.
Let’s take a look at how these devices are implemented and used in real situations.
Fluid Infusion Needs
The first line of treatment for trauma patients is controlled fluid infusion, but conventional units are not suitable for field use. Standard infusion pumps deliver about 100mL of liquid per hour, but a wounded soldier experiencing trauma needs liquids much faster at a rate such as 100ml per minute.
Technology Based Medical Application Solutions
The solution for field equipment to provide rapid fluid infusion for trauma patients and wounded soldiers has to be a compact, low weight, battery operated unit that runs silently and no electronic signature. The basis of the infusion pump is a DC micro motor. This battery operated, miniature high torque motor weighs in under a half of a pound and runs on six triple-A batteries for over 10 hours. These specifications are achieved through efficient operation.
The crux of the design is a unique cartridge set and disposable tube system. When one tube is being compressed, it stored potential energy. Once the tube is empty, that potential energy is recovered as the expansion of the empty tube boosts the action of rocking the yoke to the other side so that it can begin to compress the other tube. In this way, the function of using one infusion cartridge powers the second, doubling the overall flow with only a minimal increase in required power.
The Motor Solution
Of course, to deliver the infusion liquids in such a compact unit, a high torque motor is needed. To find the appropriate battery powered device, a DC micro motor is used to fit the bill. In only a 13mm DC micro motor with a 76:1 gearhead reduction ratio, the infusion pump is able to deliver a sustained 100mL per min or a quick 250mL single burst for critical situations.
The finished Power Infuser product is a base pump unit topped with a disposable cartridge. The unit weighs in less than 10 ounces and measures 5 inches by 4 inches by 2.3 inches. The infuser is able to meet a wide range of criteria and deliver high volume infusions in a compact battery operated unit. Thanks to miniaturized DC micro motors, soldiers on the field have one more tool to ensure that they get home safely.
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