Ultrasound guided regional anaesthesia has become the dominant technique. Today even the finest anatomical structures including peripheral nerves can be identified in detail and anaesthetised selectively under viewing, using the modern high-resolution ultrasound scanners. Echogenic cannulas are more convenient, contribute to an improved quality of the ultrasound image in use, when compared with non-echogenic designs1 whereby the cannula is advanced completely under viewing, resulting in a minimization of the risk of complications. The visibility of cannulas under ultrasound monitoring has become one of the most important criteria for the selection of a product in clinical practice, particularly in steep insertion angles. 2Based on the „Cornerstone“ technology , developed together with Dr. Chris Mitchell, PAJUNK® launched the echogenic Sono cannulas a few years ago, that exactly meet these requirements.3



"Cornerstone" reflectors – more visibility and security under ultrasound
The patented “Cornerstone” reflectors with their three reflective surfaces are crucial for the outstanding reflection of the ultrasound waves and associated with this the visibility of the Sono cannulas.3
Convincing cannula tip visibility
The "Cornerstone“ reflectors are attached at the distal end of the cannula, so that the cannula tip can be clearly identified. The risk of a nerve contact by the cannula and thus also the risk of nerve injuries can be reduced.4
Visibility even for steep insertion angles
Even with an insertion angle of 60°-70°, the ultrasound waves are reflected very well. The Sono cannulas are extremely visible even for a steep insertion angle.3
Sophisticated layout
The „Cornerstone“ reflectors are offset at 60° around the cannula and attached at two sections each of 10 mm length. The ultrasound waves are reflected along a total length of 20 mm and, as a result the cannula tip can be identified with absolute certainty.
Precise insulation
The Sono cannulas are coated using the innovative NanoLine technology. This has excellent gliding qualities, increases visibility under ultrasound monitoring5 and enables exact stimulation exclusively through the non-insulated tip.


1/2Abbal B., Choquet O., Gourari A., Bouic N., Massone A., Biboulet P., Bringuier S., Capdevilla X., Enhanced visual acuity with echogenic needles in ultrasound-guided axillary brachial plexus block: A Randomized, Comparative, Observer-blinded Study, Minerva Anestes., 2014 Jul 24; 67: 1-30 3Uppal V., Sondekoppam R.V., Ganapathy S., Effect of beam steering on the visibility of echogenic and nonechogenic needles: a laboratory study, Can. J. Anesth./J. Can. Anesth. 2014; 61: 909-915 4Schafthalter-Zoppoth I., McCulloch C. E., Gray A. T. Ultrasound Visibility of Needles Used for Regional Nerve Block: An In Vitro Study, Reg. Anesth. Pain. Med., Volume 29 Number 5, 2004 Sept-Okt; 480-488 5Edgcombe H., Hocking G. Sonograpic Identification of Needle Tip by Specialists and Novices, Reg. Anest. Pain. Med., Volume 35 Number 2, 2010 March-April; 207-211