Method and system for determining the pressure of a fluid in a syringe, an access port, a catheter, and a gastric band

A system for determining a pressure of a fluid in a gastric band for the treatment of obesity, the system comprising:

• a needle having a tip and a base, the needle further having a channel between the tip and the base for carrying the fluid;
• a syringe fluidly coupled to the needle, the syringe having a plunger and a barrel;
• and
• a syringe pressure accessory having a first end coupled to the base of the needle and a second end coupled to the barrel of the syringe and providing a fluid path between the syringe and the needle, the syringe pressure accessory including:
• a disposable unit disposable after a single use, the disposable unit having a pressure sensor configured to access the fluid path for obtaining pressure data and a data storage coupled to the pressure sensor, the data storage configured to store pressure sensor calibration data,
• a durable unit configured to be reusable and coupled to the disposable unit, the durable unit positioned at a location outside the fluid path, the durable unit configured to analyze the obtained pressure data, the durable unit comprising:
• a microcontroller configured to control operation of the durable unit;
• a status LED coupled to the microcontroller, the status LED configured to indicate a status of the durable unit;
• a radio coupled to the microcontroller, the radio configured to send and receive signals between the durable unit and a remote display unit;
• an antenna coupled to the radio, the antenna for assisting the radio in sending and receiving the signals between the durable unit and the remote display unit;
• an on indicator coupled to the microcontroller, the on indicator configured to indicate whether the durable unit is powered;
• and
• a battery coupled to the microcontroller and the on indicator, the battery configured to power the microcontroller and the indicator, and
• a valve located between the syringe and the needle, the valve having an open configuration for allowing the fluid to flow through the valve and a closed configuration for preventing the fluid from flowing through the valve which isolates the pressure of the fluid and improves accuracy of the pressure data obtained by the pressure sensor.