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Resuscitation after severe hemorrhage is a very delicate process that involves many biological procedures that need to be carried out within a very limited time window. To successfully revive a victim of severe exsanguination , one must work quickly within the "golden hour" time limit. In this time, there are various traumas that must be avoided; cardiac arrest, hypotension, hemorrhagic shock, and hypothermia to name a few. The resuscitation process involves the restoration of normotension (normative blood pressure) while avoiding cardiac arrest and hemorrhagic shock. Even when normotension has been restored, hemorrhagic shock, which can cause organ failure, can be a concern. There are three types of hemorrhagic shock: compensated hemorrhagic shock; uncompensated hemorrhagic shock, which is reversible; and irreversible hemorrhagic shock. The most common method of resuscitation makes use of lactated Ringer's solution to compensate for lost blood volume by causing the cells to swell, which in turn restores normotension . Though this works fairly well, it is not the optimal treatment. Half of the deaths that occur annually are due to acute illness or injury, and are associated with circulatory failure or shock. Some of these deaths could be avoided by proper monitoring. Present technology involves monitoring early in the temporal course of an acute illness to observe the cardiac index, oxygen delivery and oxygen consumption. In future, a possibility for a very effective non-invasive monitoring device, would be one which could provide the following cardiac output readings: pulse oximetry for estimating arterial hemoglobin oxygen saturations, a reflection of pulmonary function; transcutaneous oxygen and CO2 tensions, reflections of tissue perfusion; and noninvasive blood pressure readings. Non-invasive systems are far more effective than invasive systems because they provide a constant display of the data and can be used at any location, whether in the hospital or in the field. In future, if systems like these are perfected, shock may be easily intercepted and avoided, thus resulting in a significant number of saved lives. Future studies on resuscitation should be centered around shock, prevention of cardiac arrest as well as on increasing oxygen transport and increasing blood volume. The validity of blood pressure as a measure of organ viability and optimum possibility of resuscitation should be investigated as well. That said, resuscitation research should center mainly on developing procedures that can do all of these quickly and efficiently so that resuscitation will save lives everywhere - from hospital to battlefield.