Douglas Bags

£184.80£787.20 Incl. VAT

Douglas Bags

The Douglas bag is designed to collect the air you exhale during breathing tests, ensuring accurate measurement of respiratory parameters such as tidal volume, vital capacity, and respiratory rate. This precision is crucial in various fields like sports science, medical diagnostics, and respiratory therapy.

Douglas Bags have been used for the collection of exhaled respiratory gases since the 1800’s*. Back in the early days, bags were designed to be worn on the person and utilised a valve at the mouth to control the flow of air. Nowadays, we typically mount bags on a frame for easy access when a test subject will exercising on an ergometer or treadmill. We still use a Non-Rebreathing Valve with a mouthpiece and length of breathing tube.

Our Douglas bags are made from polyvinyl chloride, are tough and durable with electrically welded seams and come in a variety of sizes between 2L – 1000L. Most commonly supplied are; 100L, 150L, 200L.

For measurement of respiratory gases, we recommend the Servomex Gas Analyser.

Douglas Bags

Whether you’re conducting pulmonary function tests in a clinical setting, assessing respiratory fitness in athletes, or studying respiratory physiology in research, the Douglas bag adapts to various applications. Its versatility makes it a must-have tool for professionals in respiratory care. By providing precise measurements of respiratory parameters, the Douglas bag enables thorough analysis of pulmonary function and respiratory performance. This valuable data can inform diagnosis, treatment planning, and performance optimization strategies.

Made from polyvinyl chloride, Douglas bags are engineered for reliability, the respiratory Douglas bag delivers consistent performance over time. Its robust construction ensures that it can withstand repeated use in diverse environments without compromising accuracy.

The traditional way of measuring Oxygen Uptake has been to use Douglas Bags. However, difficulty in being able to mate the various components and avoiding leaks has always been a problem. For many years, Cranlea Human Performance has provided full Douglas Bag system to University laboratories, with our very own custom-built frames. Each Douglas Bag System is supplied with Hans Rudolph valves and stopcocks, widely regarded as the Gold Standard in respiratory accessories, giving you a high quality, leak free, easy to use solution. For more information, please click on the link below.

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