Modular Patient Warming System with Conductive Heating
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Solution Overview
Problem
Conventional patient warming systems, such as forced air convective and fluid conductive warming systems, face issues with temperature consistency, noise, contamination risks, and limited versatility, making them inadequate for maintaining patient core body temperature effectively during medical procedures.
Innovation Solution
A modular patient warming system utilizing electrically conductive heating with a control unit that includes a controller, temperature sensors, and interchangeable warming devices, which uses pulse width modulation and over-temperature protection to ensure safe and consistent temperature control across various applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If forced air convective warming is used, then patient warming capability is provided, but temperature consistency at the patient contact surface deteriorates
Solution Approach 1:
The patent replaces the mechanical convective airflow system with an electrically conductive heating system. The heating blanket uses electrical resistance heating elements embedded in the blanket structure, eliminating the need for fans and airflow mechanisms. This substitution provides direct conductive heating through the blanket to the patient, ensuring uniform temperature distribution across the contact surface without the temperature inconsistencies caused by convective airflow patterns.
2Temperature
If forced air convective warming is used, then patient warming capability is provided, but surgical site contamination risk increases
Solution Approach 1:
The patent eliminates the mechanical airflow system (fans, ducts, and air circulation mechanisms) that causes surgical site contamination. Instead, it uses electrical resistance heating elements embedded in the blanket that provide warmth through direct conduction to the patient's body, completely removing the source of airborne contamination in the surgical environment.
3Temperature
If forced air convective warming is used, then patient warming capability is provided, but system noise increases
Solution Approach 1:
The patent replaces the noisy mechanical fan-driven convective airflow system with a silent electrical heating system. The heating blanket uses resistive heating elements that generate heat electronically without any moving parts, eliminating the fan noise and mechanical sounds associated with forced air convective warming systems.
4Temperature
If fluid conductive warming is used, then patient warming capability is provided, but temperature consistency at the patient contact surface deteriorates
Solution Approach 1:
The patent replaces the fluid-based conductive warming system with an electrical heating system. The heating blanket uses electrical resistance heating elements distributed uniformly throughout the blanket structure, providing consistent thermal energy through direct electrical conduction. This eliminates the temperature inconsistencies that occur in fluid systems due to pump variations, fluid flow irregularities, and heat exchanger inefficiencies.
5Temperature
If fluid conductive warming is used, then patient warming capability is provided, but system noise increases
Solution Approach 1:
The patent replaces the noisy fluid pumping and circulation system with a silent electrical heating system. The heating blanket uses electrical resistance elements that convert electrical energy directly to thermal energy without requiring pumps, fluid circulation, or mechanical components, thereby eliminating the pump noise and fluid flow sounds present in fluid conductive warming systems.
6Device complexity
If a single-type warming device is used, then device simplicity is maintained, but application versatility deteriorates
Solution Approach 1:
The patent designs a universal heating blanket system that can be adapted to multiple patient positions and surgical applications. The blanket incorporates adjustable heating zones, flexible sizing options, and can be configured for use in various positions (supine, lateral, prone). This single device design provides multi-functionality across different surgical procedures and patient orientations, eliminating the need for multiple specialized warming devices while maintaining operational simplicity through a unified control system.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides reliable and consistent temperature control, reduces noise and contamination risks, and allows for flexible use across different medical applications, ensuring patient safety by effectively maintaining core body temperature.
Implementation Method 1
one or more heating elements
Implementation Method 2
one or more temperature sensors
Implementation Method 3
controls application of power to the warming device relative to a set temperature
Data Source
AI summary
A patient warming system includes a control unit coupled to one or more warming devices. The control unit may control application of power to the heating elements of the warming devices. The control unit may provide hardware and/or software approaches to monitor and detect an overtemperature situation and/or fault of a given warming device.