MUMBAI, India, April 17 -- Intellectual Property India has published a patent application (202641020800 A) filed by Saveetha Institute Of Medical And Technical Sciences, Chennai, Tamil Nadu, on Feb. 23, for 'closed loop presure relief pop cast for long bone fracture immobilization.'
Inventor(s) include Nivetha D; Kotteeswaran K; and Deepak Nallaswamy Veeraiyan.
The application for the patent was published on April 17, under issue no. 16/2026.
According to the abstract released by the Intellectual Property India: "The present invention relates to a closed-loop pressure-relief plaster of Paris (POP) cast designed for immobilization of long-bone fractures while actively preventing complications associated with excessive intra- cast pressure such as compartment syndrome, neurovascular compromise and patient discomfort. The invention integrates a multilayer cast structure comprising an inner soft liner, embedded flexible pressure sensors and an outer POP layer containing automatic pressure-relief zones. The pressure sensors continuously monitor circumferential pressure at multiple zones along the length of the fractured limb including the proximal segment, fracture site and distal segment. Sensor data is transmitted to a microcontroller-based control unit which analyzes real-time pressure levels against predefined safety thresholds. When pressure exceeds the safe limit the system automatically activates the pressure-relief mechanism which may include expandable channels, micro-release valves, vented regions in the cast, thereby reducing intra-cast pressure without compromising fracture alignment or immobilization. The control unit also provides visual and auditory alerts to the clinician and records pressure trends for monitoring. This closed-loop system enables dynamic, autonomous pressure regulation, enhancing patient safety, improving comfort and reducing the risk of post-casting complications. The invention is compatible with conventional POP casting methods allowing easy integration into standard orthopedic practice and is suitable for both adult and pediatric fracture management."
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