System and method for determining implanted device positioning and obtaining pressure data

A system for positioning a needle and obtaining pressure data, the system comprising:

• (a) a sense head, wherein the sense head comprises:
• (i) a housing,
• (ii) a plurality of receiving coils operable to receive RF signals communicated from a source of RF energy, wherein the coils are located within the housing,
• (iii) a needle window formed through the housing, wherein the needle window is configured to receive a needle, and
• (iv) a telemetry coil configured to receive pressure data obtained from a pressure sensor configured to sense the pressure of a fluid within a patient;
• and
• (b) a display device in communication with the sense head, wherein the display device is configured to provide an indication to a user relating to the position of the needle window over a needle target, wherein data indicative of the position of the needle window over the needle target is obtained using the plurality of receiving coils, wherein the display device is further configured to process the pressure data.

A method for selecting a location for inserting a needle into a patient, the method comprising:

• (a) providing a sense head, wherein the sense head comprises:
• (i) a housing,
• (ii) a plurality of receiving coils operable to receive RF signals communicated from a source of RF energy, wherein the coils are located within the housing, and
• (iii) a needle window formed through the housing, wherein the needle window is configured to receive a needle;
• (b) placing the sense head adjacent to a patient, wherein the patient has an implanted restriction system, the implanted restriction system comprising (i) an injection port, wherein the injection port comprises one or more
• telemetry coils, wherein at least one of the one or more coils is the source of RF energy,
• (ii) a restriction device operable to adjustably form a restriction within the patient,
• (iii) a fluid, wherein the fluid is located in the injection port and in the restriction device, and
• (iv) a pressure sensor operable to capture data indicative of the pressure of the fluid;
• (c) positioning the sense head substantially over the injection port, wherein the act of positioning the sense head over the injection port comprises monitoring RF signals received by the plurality of receiving coils to determine the position of the sense head relative to the injection port;
• and
• (d) inserting a needle through the needle window into the injection port.