Sinuplasty instrument with deflectable guide rail

1. An apparatus, comprising:

(a) a body;

(b) a first shaft extending distally relative to the body, wherein the first shaft includes a malleable distal portion;

(c) an actuation assembly, wherein the actuation assembly includes:

(i) second shaft extending distally relative to the body, wherein the second shaft is coaxially positioned about the first shaft, and

(ii) an actuator, wherein the actuator is operable to selectively bend the malleable distal portion of the first shaft; and

(d) a dilation catheter coaxially interposed between the first shaft and the second shaft, wherein the dilation catheter includes an expandable dilator, wherein the dilation catheter is operable to translate along the malleable distal portion of the first shaft.

2. The apparatus of claim 1 , wherein the first shaft includes a rigid proximal portion.

3. The apparatus of claim 1 , wherein the second shaft includes a deflectable distal portion, wherein the deflectable distal portion is operable to bend the malleable distal portion of the first shaft in response to actuation of the actuator.

4. The apparatus of claim 3 , wherein the actuation assembly is operable to translate along the first shaft between a proximal position and a distal position, wherein the deflectable distal portion of the second shaft is configured to be positioned proximal to the malleable distal portion of the first shaft when the actuation assembly is in the proximal position, wherein the deflectable distal portion of the second shaft is configured to be positioned about the malleable distal portion of the first shaft when the actuation assembly is in the distal position.

5. The apparatus of claim 1 , wherein the actuator is positioned at a proximal end of the second shaft.

6. The apparatus of claim 5 , wherein the actuator is positioned distal to the body.

7. The apparatus of claim 1 , wherein the actuation assembly is operable to translate relative to the body along the first shaft.

8. The apparatus of claim 1 , wherein the actuator comprises a first member and a second member, wherein the first member is rotatable relative to the second member to selectively bend the malleable distal portion of the first shaft.

9. The apparatus of claim 8 , wherein the first member comprises a rotary knob rotatable relative to the second shaft, wherein the second member comprises a stationary knob fixedly secured relative to the second shaft.

10. The apparatus of claim 8 , wherein the actuator further comprises a translating member, wherein the translating member is configured to translate and thereby selectively bend the malleable distal portion of the first shaft in response to rotation of the first member relative to the second member.

11. The apparatus of claim 10 , wherein the translating member comprises a wire.

12. The apparatus of claim 1 , wherein first shaft and the actuation assembly include features configured to prevent rotation of the second shaft relative to the first shaft.

13. The apparatus of claim 1 , further comprising a slider slidably coupled with the body, wherein the slider is operable to drive the dilation catheter longitudinally along the first shaft.

14. The apparatus of claim 1 , wherein the dilator in a non-expanded state is configured to fit in an anatomical passageway in a human head, wherein the dilator in an expanded state is configured to dilate the anatomical passageway.

15. The apparatus of claim 1 , wherein the dilation catheter is operable to translate between a proximal position and a distal position, wherein the dilator is configured to be positioned distal to a distal end of the first shaft when the dilation catheter is in the distal position.

16. The apparatus of claim 15 , wherein the dilator is configured to be positioned proximal to a distal end of the second shaft when the dilation catheter is in the proximal position.

17. An apparatus, comprising:

(a) a body;

(b) a shaft assembly extending distally relative to the body, wherein the shaft assembly comprises:

(i) a first shaft, wherein the first shaft includes a malleable distal portion, and

(ii) a second shaft, wherein the second shaft is coaxially positioned about the first shaft, wherein the second shaft includes a deflectable portion;

(c) an actuator, wherein the actuator is operable to selectively drive the deflectable portion to bend the malleable distal portion of the first shaft; and

(d) a dilation catheter coaxially interposed between the first shaft and the second shaft, wherein the dilation catheter includes an expandable dilator, wherein the dilation catheter is operable to translate along the malleable distal portion of the first shaft.

18. The apparatus of claim 17 , wherein the actuator is secured to a proximal portion of the second shaft.