Department of Bioengineering
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Magnetic resonance imaging (MRI) is a powerful medical imaging technique used to create detailed images of tissue structures within the body. MRI machines make use of strong magnetic fields to generate images of the anatomy inside of the body. These magnets are incredibly powerful and can create hazardous conditions if strict precautions are not observed. Certain metal objects can become high-velocity projectiles if they are accidentally taken into the scanner room. Because of this, ferromagnetic objects must be carefully restricted from the MR environment. This includes medical equipment such as IV pumps.
When undergoing magnetic resonance imaging (MRI), patients receiving intravenous fluids or medications must be attached to 25 feet of extension tubing to prevent magnetization of the dispensing equipment. This is because the dispensing equipment must sit outside of the scanner room in the control room. Nurses at Children’s Hospital are currently using a small-bore coiled extension tubing manufactured by ICU Medical Inc. The tubing is originally in a tight coil and is pulled apart to extend to 25 feet .The long tubing does not retain its coil memory, making it easy for the long lines to become entangled with other lines when the patient is transported from the hospital bed to the scanner and from room to room.
This tangling increases the occurrence of occlusions, preventing patients from receiving their intended fluid therapy until the occlusion is found. Disconnecting the tubing for de-tangling can expose the lines and the patients to bacteria from the environment, increasing the risk of infections. The tangling also disrupts clinical workflow due to the nurses having to untangle the lines which is both cumbersome and time-consuming. Nurses can spend up to an hour untangling lines after the MRI is complete .
As seen in Figure 1 and Figure 2, a feasible alternative to the problem at hand is an intravenous line separation system that would physically constrain multiple IV lines to prevent them from tangling with each other. The separation system will consist of tubing spacers with small groves. Each line will be fitted inside the small groves restricting the freedom of movement of the lines. A holding rack will be installed to the side of the hospital bed to keep the lines neatly coiled after imaging is complete. The nurses can neatly coil the long tubes after the MRI to keep them in place without interrupting the fluid flow.
References: 1. Kaseman, Sheila. Tangle Free MRI Medication Extension Tubing. [PowerPoint Presentation.]MRI Secure Room with Control Room [Digital Image]