Replacing 3pin sensor with DB9 (Nellcor SPO2 sensor) and connect to Arduino Uno

Hi everyone,

Iam working on a project that uses the following sensor

Problem:I want to replace the above mentioned pulse sensor that contains 3 pins(Vcc,GND,Analogin) with a Medical grade sensor having DB9 pins(Nellcor spo2 sensor) link mentioned below. The pin-out diagram of the Medical sensor is also attached.

Iam a mechanical engineer and new to electronics. Iam not sure how this can be achieved. Any ideas or support is greatly appreciated.

Thanks in advance.

pinout DB9 SPO2.png