Pulse oximeter is a very important device designed to monitor a critical patient in ambulancia. This device allows measuring the hemoglobin percentage in patient's blood, which reflects the level of oxygen blood carries. Such measurements are needed to control the health condition of many patients and become vitally important in caring for critical patients. The advantage of pulse oximeter is that it performs all the measurements in a new revolutionary way. Before, this advanced method of oximetry was introduced, blood samples were taken from patients to check the level of hemoglobin. But pulse oximeters offer a non-invasive method. A smaller clip is attached to an ear (or any other part of the body that is transparent enough for the laser light, finger or toe) of a patient to be monitored. A laser light of a particular wavelength (in fact, infrared and red light passes the skin at two different wavelengths) is transmitted through the clip what allows calculating the number of the red blood cells that pass through that part of the body (to make these measures a strong heart beat is needed, so the results can be sometimes inaccurate if the blood flow is weak). And using these results, the actual hemoglobin level can be easily determined. To do that clip is attached to a digital control module and it usually has a display to indicate the results of measurements. As long as the device is digital it can be easily connected to a personnel computer. That gives a lot of new possibilities, a patient`s health condition can be controlled in time because all the data is stored on the computer hard disk drive. A computer system also allows combining different measurements, add rates of oxygen patient breathes in, for example, to get better results for more accurate diagnosis. As you can see pulse oximeter is a pretty complex device and it needs a laser light source with two different wavelengths and a computer (digital) control module. That makes such a monitoring device very expensive. That is why, many hospitals have to bargain pulse oximeters. An opportunity to bargain pulse oximeter is very important for many clinics all over the world, especially in developing countries because these clinics cannot afford very expensive new brand name pulse oximeters. Today with development of information technology it is possible to bargain pulse oximeter though the internet (for example , on the website like BargainTodayStore.com you can find a great variety of models of pulse oximeters). And it is very convenient because hospitals that bargain pulse oximeter through the internet can look through a long list of different models and choose the one they need at the time. There is also another wonderful thing that can help hospitals to get pulse oximeters. Many medical equipment manufacturers today offer their products for free from time to time. Such donations allow clinics to get new and effective equipment and save many lives. Such humanitarian activity is very important and it is really great that many medical equipment producers understand that.