use of comprehensive and valid tests to ensure its working before actually being placed in use in clinics is performed. A pump beating 100 times per minute will beat over 50 million times a year. This means the materials used in the construction of the pump must be durable and resistant to biodegradation. For the blood pump to be used as a replacement, it has to be embedded inside the body, preferably in the chest cavity. The human body doesn’t accept foreign materials in its system and tries to corrode them by releasing certain chemicals in to foreign object. The immune system tries to attack them and a pump has to withstand these attacks without compromising its functionality, in order to be reliable. However, even if the mechanical functioning of the pump is not compromised, these attacks will cause infection in muscle tissue which often leads to complications and in severe cases, death may result. The mechanism will experience a great amount of wear over its lifespan, therefore durable materials are required. If the materials were to wear easily at specific points such as mechanized joints, seals and areas of high shear stress, it would weaken over its use leaving the areas vulnerable to failure. An implanted heart made of non-biodegradable materials would breakdown in the environment of the human body. External materials would spread through the body and also the materials would become weaker making a higher chance of failure. The patients continued survival when using a blood pump does not only rely on the pump continuing to work for extended periods of time. Blood pumps must also minimise blood damage (such as haemolysis), prevent blood clotting, and backward flow. For the blood pump to be reliable, human errors and equipment errors must be minimised. Technologies are often presented as solutions to improve patient safety and prevent medical errors. Technologies can lead to patient safety improvements only if they are designed, implemented and used according to human factors and systems engineering principles. Repetition of experimental testing is the most important factor to improve the accuracy and reliability. The following is some properties that a specific model “Gyro PI 702” is capable of doing As we can see by these test taken the motor speed, Pump flow rate, Total Head Pressure, an efficiency they meet the standards that the human heart can do in different situations. As mention in the issues Flow rate and pressure fluctuate constantly due to exercise and different situations. These must be looked at as they could limit what someone with a blood pump can do.