Out-of-plane technique may be the better method for the blockage of thoracoabdominal nerves through perichondrial approach

2021 ◽  
Vol 69 ◽  
pp. 110155
Author(s):  
Junheng Chen ◽  
Chuzhou Ma ◽  
Chunming Guo
Keyword(s):  
Out Of Plane ◽  
Plane Technique

Study on Clinical Application of Different Ultrasound-Guided Planar Techniques in Minimally Invasive Percutaneous Nephrolithotomy

2021 ◽  
pp. 155335062199779
Author(s):  
Difu Fan ◽  
Leming Song ◽  
Monong Li ◽  
Chunxiang Luo ◽  
Xiaohui Liao ◽  
...  
Keyword(s):  
Minimally Invasive ◽  
Real Time ◽  
Clinical Application ◽  
Short Axis ◽  
Ultrasound Guided ◽  
Out Of Plane ◽  
Minimally Invasive Percutaneous Nephrolithotomy ◽  
Plane Group ◽  
Plane Technique ◽  
Guided Puncture

Objective. The objective is to explore the clinical application value of ultrasound long- and short-axis planar technology in real-time guided puncture in minimally invasive percutaneous nephrology. Methods. The clinical data of 80 patients undergoing real-time ultrasound-guided minimally invasive percutaneous nephrolithotomy from September 2018 to October 2019 were analyzed. The patients were randomly divided into 2 groups with different ultrasound-guided puncture techniques, long-axis in-plane technique and short-axis out-of-plane technique. Results. Minimally invasive percutaneous nephrolithotomies under real-time ultrasound guidance were successfully completed in both groups of patients. The success rate of the first puncture in the short-axis out-of-plane group was significantly higher than that in the long-axis in-plane group, and the differences were statistically significant ( P <.05); the total puncture time in the short-axis out-of-plane group was significantly less than the long-axis in-plane group, and the differences were statistical significance ( P <.05); there was no significant difference in the single-stage stone removal rate, total percutaneous renal channels, total hospital stay, and rate of complications by the Clavien classification between the 2 groups ( P > .05). Conclusion. Ultrasound long-axis and short-axis planar technologies can achieve good clinical application results in real-time guided puncture to establish percutaneous renal channels during minimally invasive percutaneous nephrolithotomy. Compared with the long-axis in-plane technique, the short-axis out-of-plane technique can shorten the puncture time and improve the success rate of the first puncture.

Ultrasound guidance for internal jugular vein cannulation in neonates: Modified dynamic needle tip positioning short-axis out-of-plane technique versus long-axis in-plane technique, a randomized controlled trial

2021 ◽  
pp. 112972982110150
Author(s):  
Yanzhe Tan ◽  
Zhenzhen Tu ◽  
Ping Ye ◽  
Ying Xu ◽  
Mao Ye ◽  
...  
Keyword(s):  
Randomized Controlled Trial ◽  
Success Rate ◽  
Internal Jugular Vein ◽  
Ultrasound Guidance ◽  
Jugular Vein ◽  
Controlled Trial ◽  
Short Axis ◽  
Randomized Controlled ◽  
Out Of Plane ◽  
Plane Technique

Background: Ultrasound-guided central venous catheter placement has significantly improved the success rate of punctures and reduced the risk of complications. However, catheterizing the internal jugular vein under ultrasound guidance in neonates remains challenging. Methods: Ninety-six patients were screened for eligibility in this randomized controlled trial between November 2018 and October 2019. After meeting the inclusion criteria, 90 term neonates undergoing cardiothoracic, general, or neurosurgery procedures were randomly assigned to the modified dynamic needle tip positioning short-axis ( n = 45) or long-axis groups ( n = 45) using a computer-generated random numbers table. The primary outcome was the first-attempt success rate. The secondary outcomes included the total success rate, cannulation time, and incidence of cannulation-related complications, including hematoma, accidental arterial puncture, or pneumothorax. Data were compared between the two groups. Results: The success rate for the first attempt was higher (88.9% vs 64.4%; p = 0.001; relative risk, 1.4; 95% confidence interval, 1.1–1.8), while the cannulation time was shorter (171.0 ± 47.8 s vs 304.4 ± 113.5 s; p = 0.001; estimated difference, −133.4; 95% confidence interval, −170.1 to −96.7), in the modified dynamic needle tip positioning short-axis group compared with the long-axis group. Six hematomas and two common carotid artery punctures were identified in the long-axis group, while none were identified in the modified dynamic needle tip positioning short-axis group. Conclusions: The modified dynamic needle tip positioning short-axis out-of-plane technique enhanced the procedural efficacy and safety of internal jugular vein catheterization in neonates.

scholarly journals Optimal head rotation angle for safe right internal jugular vein catheterization using out-of-plane approach: an ultrasonography study

2019 ◽  
Vol 21 (4) ◽  
pp. 435 ◽  
Author(s):  
Saulius Vosylius ◽  
Akvile Sabestinaite ◽  
Raimundas Stasiunaitis
Keyword(s):  
Internal Jugular Vein ◽  
Rotation Angle ◽  
Jugular Vein ◽  
Head Rotation ◽  
Neutral Position ◽  
Internal Jugular Vein Catheterization ◽  
Out Of Plane ◽  
Plane Technique ◽  
The Right ◽  
Vein Catheterization

Aim: The most common complication following internal jugular vein catheterization is the puncture of the common carotidartery. We aimed to find an optimal head rotation angle for safe vein catheter insertion while minimizing the risk of arterypuncture.Materials and methods: Eighty-two patients admitted to the intensive care unit were included in the prospective study. Ultrasound examination of the neck vessels on the right side was performed in the neutral position and at a head rotation of 15°, 30°, 45° and 60° to the left. Internal jugular vein and common carotid artery puncture angle, overlapping angle of vein by artery and vein safe puncture angle were evaluated.Results: The internal jugular vein puncture angle increased with head rotation from the neutral position to 30° and 45° and was largest at 60° (p<0.001 for all). The overlapping angle increased significantly at 45° and 60° rotation compared with the neutral position (p<0.001 for all). The vein safe puncture angle was highest at 30° and significantly different from the neutral position and 60° (p=0.003 and p=0.013, respectively).Conclusions: When performing right internal jugular vein catheterization without ultrasound guidance by using an out-of-plane technique, the head should be rotated at 30°, because the overlapping angle increases with further head rotation and can increase the risk of artery puncture.

Grain separation enhanced magnetic coercivity in Pt/Co multilayers.

1993 ◽  
Vol 51 ◽  
pp. 1038-1039 ◽  
Author(s):  
G.A. Bertero ◽  
R. Sinclair
Keyword(s):  
Remanent Magnetization ◽  
Strong Influence ◽  
Uniaxial Anisotropy ◽  
Magnetic Coupling ◽  
Recording Media ◽  
Magnetic Media ◽  
Signal To Noise ◽  
Out Of Plane ◽  
Longitudinal Recording ◽  
The Relationship

Pt/Co multilayers displaying perpendicular (out-of-plane) magnetic anisotropy and 100% perpendicular remanent magnetization are strong candidates as magnetic media for the next generation of magneto-optic recording devices. The magnetic coercivity, Hc, and uniaxial anisotropy energy, Ku, are two important materials parameters, among others, in the quest to achieving higher recording densities with acceptable signal to noise ratios (SNR). The relationship between Ku and Hc in these films is not a simple one since features such as grain boundaries, for example, can have a strong influence on Hc but affect Ku only in a secondary manner. In this regard grain boundary separation provides a way to minimize the grain-to-grain magnetic coupling which is known to result in larger coercivities and improved SNR as has been discussed extensively in the literature for conventional longitudinal recording media.We present here results from the deposition of two Pt/Co/Tb multilayers (A and B) which show significant differences in their coercive fields.

Anisotropy of Nanoindentation – a tool for the determination of nanocrystal orientation ?

2003 ◽  
Vol 779 ◽  
Author(s):  
David Christopher ◽  
Steven Kenny ◽  
Roger Smith ◽  
Asta Richter ◽  
Bodo Wolf ◽  
...  
Keyword(s):  
Crystal Surface ◽  
Scanning Force Microscopy ◽  
Depth Range ◽  
Dislocation Loops ◽  
Force Microscopy ◽  
Pile Up ◽  
Out Of Plane ◽  
Scanning Force ◽  
Dynamics Simulations

AbstractThe pile up patterns arising in nanoindentation are shown to be indicative of the sample crystal symmetry. To explain and interpret these patterns, complementary molecular dynamics simulations and experiments have been performed to determine the atomistic mechanisms of the nanoindentation process in single crystal Fe{110}. The simulations show that dislocation loops start from the tip and end on the crystal surface propagating outwards along the four in-plane <111> directions. These loops carry material away from the indenter and form bumps on the surface along these directions separated from the piled-up material around the indenter hole. Atoms also move in the two out-of-plane <111> directions causing propagation of subsurface defects and pile-up around the hole. This finding is confirmed by scanning force microscopy mapping of the imprint, the piling-up pattern proving a suitable indicator of the surface crystallography. Experimental force-depth curves over the depth range of a few nanometers do not appear smooth and show distinct pop-ins. On the sub-nanometer scale these pop-ins are also visible in the simulation curves and occur as a result of the initiation of the dislocation loops from the tip.

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