Nominal logistic regression analysis of variables determining needle visibility in ultrasound images – a full factorial cadaver study

Table 1 Characteristics of tested needles

Number	Manufacturer	Name	Tip Design	Echogenicity	Diameter (Gauge)	Length (mm)
1	Pajunk	Sonoplex Stim	Facet	echogenic	22 G	80 mm
2	Pajunk	Sonoplex Stim	Sprotte	echogenic	22 G	90 mm
3	Pajunk	SonoTAP	Facet	echogenic	22 G	80 mm
4	Teleflex	SpinoStar Ballpen	Ballpen	non-echogenic	22 G	90 mm
5	Teleflex	Spinostar Pencil-Point OPTI	Sprotte	non-echogenic	22 G	90 mm
6	Teleflex	SpinoStar Standard	Facet	non-echogenic	22 G	90 mm
7	B. Braun	Stimuplex D	Facet 15°	non-echogenic	22 G	80 mm
8	B. Braun	Stimuplex D	Facet 30°	non-echogenic	22 G	80 mm
9	B.Braun	Stimuplex Ultra 360	Facet 30°	echogenic	22 G	80 mm
10	Teleflex	UltraQuik PNB	Facet	echogenic	22 G	70 mm

Characteristics of tested needles. Manufacturers: B. Braun, Melsungen, Germany; Pajunk, Geisingen, Germany; Teleflex, Wayne, Pennsylvania, USA

ISSN: 1471-2253