Device for Detecting a Blood Vessel

A method of detecting a blood vessel within a patient, comprising:

• projecting a first light having a first wavelength through tissue of a detection area of the patient;
• projecting a second light having a second wavelength through the tissue of the detection area, the second wavelength different from the first wavelength;
• receiving a first reflected light resulting from the first light, the first reflected light defining a first intensity;
• receiving a second reflected light resulting from the second light, the second reflected light defining a second intensity;
• calculating a first parameter based on the first intensity and the second intensity;
• comparing the parameter with a defined parameter limit;
• determining, as a result of the comparison, that a blood vessel is present with the detection area when the parameter exceeds the defined limit;
• providing a visual or audible notification that a blood vessel is present within the detection area when the parameter exceeds the defined limit.