[New compound needle for percutaneous renal puncture].

OBJECTIVE

We have developed a needle for direct percutaneous access in order to introduce the flexible wire with a single puncture, without creating two parallel tracks, thereby affording a lower morbidity than the conventional technique.

METHOD

The needle consists of an internal and an external device, with different lengths and diameters, that let us first create the access to the urinary tract with the inner device and then dilate with the outer device in order to introduce the metallic wire with a single puncture, sliding the outer over the inner device.

RESULTS

We can achieve the same number of percutaneous accesses with less morbidity since less punctures are required to create the track.

CONCLUSION

This is a useful needle for any type percutaneous access.