Injection port applier with downward force actuation

1. An injection port applier, wherein the injection port applier is configured to engage an injection port having integral fasteners that are movable from a non-deployed position to a deployed position, the injection port applier comprising:

(a) a shaft having a proximal end and a distal end;

(b) a port engagement portion at the distal end of the shaft, wherein the port engagement portion is configured to engage an injection port, wherein the port engagement portion comprises a fastener deployment member operable to move the fasteners of the injection port from the non-deployed position to the deployed position; and

(c) a handle at the proximal end of the shaft, wherein the handle includes:

(i) a first handle portion integral with the shaft, and

(ii) a second handle portion movable relative to the first handle portion, wherein the second handle portion is movable distally, toward the first handle portion, to actuate the fastener deployment member to move the fasteners of the injection port from the non-deployed position to the deployed position.

2. The injection port applier of claim 1 , wherein at least part of the first handle portion extends transversely from the shaft.

3. The injection port applier of claim 1 , wherein at least part of the second handle portion extends transversely relative to the shaft.

4. The injection port applier of claim 1 , further comprising an elongate actuating member coupled with the second handle portion, wherein the elongate actuating member is in communication with the fastener deployment member, wherein the elongate actuating member is movable along a longitudinal axis defined by the elongate actuating member.

5. The injection port applier of claim 4 , wherein the elongate actuating member extends through at least part of the shaft.

6. The injection port applier of claim 4 , further comprising a cam pin and a cam ground, wherein the cam pin extends transversely from the elongate actuating member, wherein the cam pin is configured and positioned to engage the cam ground.

7. The injection port applier of claim 6 , wherein the cam ground defines a track, wherein the cam pin is disposed in the track.

8. The injection port applier of claim 7 , wherein the track is curved.

9. The injection port applier of claim 6 , wherein the cam ground comprises a cam collar, wherein the elongate actuating member extends through the cam collar, such that the cam collar is disposed about the elongate actuating member.

10. The injection port applier of claim 6 , wherein the cam ground and the cam pin are configured to cooperate to rotate at least part of the elongate actuating member about the longitudinal axis of the elongate actuating member as the elongate actuating member is moved along the longitudinal axis of the elongate actuating member.

11. The injection port applier of claim 10 , wherein the fastener deployment member is rotatable from a first position to a second position to move the fasteners of the injection port from the non-deployed position to the deployed position, wherein at least part of the elongate actuating member is operable to rotate the fastener deployment member in response to the cam pin and cam ground rotating at least part of the elongate actuating member.

12. The injection port applier of claim 4 , wherein the elongate actuating member has a bent flexible portion, wherein the flexible portion is configured to rotate while bent in order to rotate the fastener deployment member.

13. The injection port applier of claim 1 , further comprising a resilient member, wherein the resilient member is configured to bias the second handle portion proximally, away from the first handle portion.

14. The injection port applier of claim 1 , wherein the first handle portion is pivotally coupled with the second handle portion.

15. An injection port applier, wherein the injection port applier is configured to engage an injection port having integral fasteners that are movable from a non-deployed position to a deployed position, the injection port applier comprising:

(a) an elongate body having a proximal end and a distal end;

(b) an actuating shaft assembly extending through at least a portion of the elongate body;

(c) a port engagement portion at the distal end of the elongate body, wherein the port engagement portion is configured to engage an injection port, wherein the port engagement portion comprises a port actuator operable to move the fasteners of the injection port from the non-deployed position to the deployed position, wherein the actuating shaft assembly is movable relative to the elongate body in order to move the port actuator to thereby move the fasteners of the injection port from the non-deployed position to the deployed position; and

(d) a handle at the proximal end of the elongate body, wherein the handle comprises:

(i) a first handle portion in a fixed relationship with the elongate body, and

(ii) a second handle portion movable relative to the first handle portion, wherein the second handle portion is coupled with the actuating shaft assembly, wherein the second handle portion is movable distally, toward the first handle portion, to move at least part of the actuating shaft assembly relative to the elongate body.

16. The injection port applier of claim 15 , wherein a first portion of the shaft assembly is configured to translate longitudinally relative to the elongate body, wherein a second portion of the shaft assembly is configured to rotate relative to the elongate body.

17. The injection port applier of claim 16 , further comprising a cam feature, wherein the cam feature is configured to rotate the second portion of the shaft assembly in response to translation of the first portion of the shaft assembly.

18. The injection port applier of claim 15 , wherein the port actuator is rotatable to move the fasteners of the injection port from the non-deployed position to the deployed position, wherein the shaft assembly is configured to rotate the port actuator in response to distal movement of the second handle portion.

19. A method of using an injection port applier to install an injection port in a patient, wherein the injection port has a plurality of fasteners, wherein the injection port is removably coupled with the injection port applier, wherein the injection port applier comprises a fixed handle and an actuation handle, wherein the actuation handle is movable relative to the fixed handle, wherein the actuation handle is operable to move the fasteners from a non-deployed position to a deployed position, the method comprising:

(a) positioning the injection port adjacent to tissue at a deployment site in a patient; and

(b) pushing the actuation handle downwardly toward the patient in order to deploy the fasteners in the tissue, wherein the act of pushing the actuation handle downwardly comprises moving the actuation handle downwardly relative to the fixed handle.

20. The method of claim 19 , wherein the injection port applier further comprises a rotary actuator in communication with the actuation handle, wherein the actuation handle is operable to rotate the rotary actuator to move the fasteners from the non-deployed position to the deployed position, wherein the act of pushing the actuation handle downwardly toward the patient further comprises rotating the rotary actuator to move the fasteners from the non-deployed position to the deployed position.