Artikel
Navigation raises the security and efficiency of ultrasound-guided cannulations: a preclinical trial
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Veröffentlicht: | 30. Juli 2013 |
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Gliederung
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Introduction: The navigation system of the company eZono AG (Jena) can superimpose the position of the needle and the intersection of the needlepoint with the ultrasound-area while ultrasound-guided cannulations. To use this system should perspectivally increase the efficiency of ultrasound-guided cannulations.
Methods and material: 24 medical students without prior knowledge cannulated an ultrasound-phantom in pseudorandomised order in a pre-clinical trial after short standardized introductions in four settled terms. B1: “in plane”-cannulation without navigation, B2 “out of plane”-cannulation without navigation, B3 “in plane”-cannulation with navigation and B4 “out of plane”-cannulation with navigation. The students had five minutes in each settled term to do as much cannulations as possible. Camcorders and the ultrasound scanner recorded all experiments completely.
Results: “Out of plane”-cannulation with navigation (B4) in comparison to cannulations without navigation (B2) increased the accuracy from 1.5 hits (SD: 2.0) to 5.4 hits (SD: 3.1; p<0.001). It was also less time needed to hit the target the very first time from mean 81.2 sec. (SD: 89.0) in B2 to 30.7 sec. (SD: 26.9; p=0.009) in B4. The number of total hits increased from 5 hits (SD: 2.9) in B2 to 7 hits (SD: 2.8; p=0.004) in B4.
Conclusion: The navigation in “out of plane”-technique increases the security as well as the efficiency of ultrasound-guided cannulations on the phantom. This technology promises a lot of important advances in clinical background not only for fine needle biopsies but also for vessel cannulations and in the conductive anesthesia.