EMS World

AUG 2011

EMS World Magazine is the most authoritative source in the world for clinical and educational material designed to improve the delivery of prehospital emergency medical care.

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Page 41 of 71

CAPNOGRAPHY IN EMS DEPLOYMENT KITS The Outside Matters… LONG LIFE ERGONOMIC measures how much light is shining on it. As the concen- tration of CO2 light is absorbed by the CO2 increases, more and less light is transmitted onto the detector plate. This increased light absorption directly corre- lates with the percentage of carbon dioxide. The monitor presents the CO2 concentration to the capnographer as both a number and a waveform. The respiratory rate can be very accurately estimated and reported by measuring the tides between CO2 peaks. EASILY DECONTAMINATED Visit us at EMS World Expo Booth #1212 It’s what’s inside that really counts! Blood levels of carbon dioxide are as critically impor- tant as blood oxygen levels. In fact, oxygen loading onto hemoglobin and transport to the tissues is highly dependent on the tight regulation of CO2 Furthermore, CO2 can act as a molecular signal affecting both nervous and smooth muscle tissues. Ventilation and ation are interrelated, represent distinct Oxygenation Ventilation and oxygen- but processes. Different diseases can affect the processes in different ways. Oxygenation involves loading hemoglobin with oxygen for delivery to the tissues, while ventilation addresses clear- ance of CO2 but 100% oxygen saturation. This patient is oxygenating well, but not ventilating effectively. There are three physiological processes for human life: metabo- lism, circulation and ventilation. 1. Metabolism is the utili- zation of hydrocarbons to produce energy and power tissues, organs and the entire body. This process must be continuous for life to be sustained. It is important to note, however, that several hours after cardiac arrest, some residual metabolism (liver, skeletal muscles, skin, etc.) will continue to produce CO2 . 2. Circulation. Blood must be moving in order to deliver CO2 from the tissues to the . alveoli. Circulation requires blood, an effective heartbeat and blood pressure. Preload plus afterload equals circulation. 3. Ventilation. Air must move in and out of the alveoli effectively to get rid of carbon dioxide and other waste products, and to inhale fresh oxygen. Capnography as a Tool for Measuring Metabolism, Circulation and Ventilation Capnography is a powerful from the blood. ORDERED | SECURED | CONTROLLED PRIORITY CARE Emergency Management Systems CONTACT: Geoff Maze, National Sales Manager (562) 537 1715 | geoff@prioritycareems.com www.prioritycareems.com For More Information Circle 40 on Reader Service Card See Us at EMS Expo Booth #1212 38 AUGUST 2011 | EMSWORLD.com Technologies for monitoring oxygenation have been extraordinarily useful to EMS providers for the past 20 years. More recently, technologies are being developed to enhance EMS’s abilities to measure the effectiveness of ventilation. Measuring exhaled CO2 can provide valuable insight into metabolism and circulation. Take, for example, the moder- ately sick asthma patient demonstrating a “shark fi n” pattern with an elevated EtCO2 tool for providing continuous real-time objective data to qualify and quantify the status of metabolism, circulation and venti- lation. Metabolism is assessed by determining the quantity of CO2 being exhaled and following this over time. Circulation is measured by the trends in delivery of CO2 to the lungs. Capnography is the only technology able to display respiratory rate based upon the partial pressure of exhaled CO2 while providing the unique pattern recognition of CO2 . Capnography quantifi es patient ventilation in terms of transport of CO2 from the pulmonary circulation across

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