Microperc with Self-Assembled Fr 4.85 Visual Needle and Ureteral Access Sheath

Figures & data

Figure 1. Self-assembled visual needle: (A) needle sheath; (B) Y-adapter #1; (C) fiber optic bundle (fiber endoscope); (D) Y-adapter #2; (E) Irrigation tube; (F) Holmium laser fiber.

Figure 2. Holmium laser lithotripsy during microperc: (A) puncture needle sheath; (B) Holmium laser fiber; (C) kidney stones.

Figure 3. Stone powder and fragments (white arrow) flushed out through the ureteral access sheath (red arrow) during lithotripsy.

Table 1. Demographic data and stone characteristics.

Variable	Values
Age, mean (SD), range, y	38.4 (7.5); 28-56
Sex, No. (%)
Male	18 (64.3)
Female	10 (35.7)
BMI, mean (SD), range	26.0 (2.3), 22-32.2
Stone size, mean (SD), range, cm	1.7 (0.4), 1.3-3.0
Laterality, No. (%)
Left	17 (60.1)
Right	11 (39.9)
Stone location
Single stone, No. (%)
Upper pole	2 (7.1)
Middle pole	3 (10.7)
Low pole	13 (46.4)
Pelvic	2 (7.1)
Multiple stones, No. (%)
Calyceal stones	5 (17.9)
Pelvic + calyx	3 (10.7)
CT, mean (SD), range, HU	969 (233), 478-1320
Hydronephrosis, No. (%)
None	6 (21.4)
Mild	13 (46.4)
Moderate	9 (32.1)

Abbreviations: BMI, body mass index; HU, Hounsfield unit.

Figure 4. Pre-and post-operative CT and abdominal plain film (KUB) of left low calyceal stone treated with microperc: (A) preoperative CT; (B) KUB; (C) stone and fragments disappeared on postoperative day 1.

Table 2. Intra-and postoperative Findings.

Variable	Values
Operative duration, mean (SD), range, min	47 (9.9), 35-75
Pain VAS, mean (SD), range	2.5 (1.0), 1-6
Hospitalization, mean (SD), range, day	3.1 (0.8), 2-5
Hemoglobin decrease, mean (SD), range, g/L	6.4 (1.0), 5-9
Stone free rate post-op month 1, % (n)	92.9, (26/28)
Complication, No.
Clavien I	3
Clavien II	1

Abbreviation: VAS, visual analog scale.

Availability of data and material

The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.