scholarly journals Regarding “A new simple method of converting a retrograde femoral access to an antegrade catheterization”

2015 ◽  
Vol 62 (4) ◽  
pp. 1103
Author(s):  
Anantha K. Ramanathan ◽  
Morgan Peter Schulze
Keyword(s):  
Simple Method ◽  
Femoral Access ◽  
Antegrade Catheterization

scholarly journals A new simple method of converting a retrograde femoral access to an antegrade catheterization

2014 ◽  
Vol 60 (3) ◽  
pp. 792-795 ◽  
Author(s):  
August Ysa ◽  
Marta Lobato ◽  
Roberto Gómez ◽  
Amaia Arruabarrena ◽  
Matthew Metcalfe ◽  
...  
Keyword(s):  
Simple Method ◽  
Femoral Access ◽  
Antegrade Catheterization

On-Site–Modified Sheath to Overcome the Undesirable Catheterization of the Profunda Femoris Artery During Antegrade Femoral Access

2020 ◽  
Vol 27 (3) ◽  
pp. 505-508 ◽  
Author(s):  
August Ysa ◽  
Marta Lobato ◽  
Amaia Arruabarrena ◽  
Ana M. Quintana ◽  
Roberto Gómez ◽  
...  
Keyword(s):  
Femoral Artery ◽  
Superficial Femoral Artery ◽  
Common Femoral Artery ◽  
Simple Method ◽  
Femoral Access ◽  
Profunda Femoris Artery ◽  
Distal Marker ◽  
Antegrade Puncture ◽  
Repeated Passage ◽  
Profunda Femoris

Purpose: To present a simple method to avoid favored passage of a guidewire into the profunda femoris artery (PFA) after antegrade puncture of the common femoral artery. Technique: A 6-F conventional introducer sheath with a radiopaque distal marker is placed on the nurse’s table with its side port orientated to the 12 o’clock position. A small (2–2.5 mm) oval fenestration is created on the superior aspect of the sheath about 3 cm from its tip with a size 11 surgical blade. The modified introducer is passed over the angled 0.035-inch guidewire into the PFA and gently retrieved until the tip marker is ~3 cm from the femoral bifurcation. The dilator is removed, and the guidewire is withdrawn to the level of the fenestration, manipulated through it, and advanced further into the superficial femoral artery under fluoroscopic guidance. Conclusion: When repeated passage of the guidewire down the PFA persists despite conventional manipulation of the wire or needle, an on-site modification of the sheath is an easy alternative approach for the catheterization of the superficial femoral artery.

Use of a Steerable Sheath for Antegrade Catheterization of a Supra-aortic Branch of an Inner-Branched Arch Endograft via a Percutaneous Femoral Access

2020 ◽  
Vol 27 (6) ◽  
pp. 917-921
Author(s):  
Alberto M. Settembrini ◽  
Tilo Kölbel ◽  
Fiona Rohlffs ◽  
Ahmed Eleshra ◽  
E. Sebastian Debus ◽  
...  
Keyword(s):  
Aortic Dissection ◽  
Hybrid Approach ◽  
Innominate Artery ◽  
Ascending Aorta ◽  
Acute Type ◽  
Thoracoabdominal Aorta ◽  
Femoral Access ◽  
Custom Made ◽  
Antegrade Catheterization ◽  
Steerable Sheath

Purpose: To describe the use of a steerable sheath from a femoral access for antegrade catheterization of the left common carotid artery (LCCA) in an inner-branched arch endograft. Technique: This technique is demonstrated in a patient with residual aortic dissection after replacement of the ascending aorta for acute type A aortic dissection. He presented 4 years later with aneurysmal degeneration of the thoracoabdominal aorta and a proximal tear located in the aortic arch. A 2-stage hybrid approach was devised to treat the patient. An axilloaxillary crossover graft (left to right) with plug occlusion of the innominate artery was performed initially. Later, a dual-branched custom-made device was implanted. To avoid an additional LCCA cutdown for retrograde branch access, an 18-F steerable sheath was used through a percutaneous femoral access. Two wires were delivered within the steerable sheath: the first one was directed into the left subclavian artery to stabilize the sheath position in the ascending aorta; the second wire was used to catheterize the first inner branch and the LCCA to deploy the covered bridging stent. Conclusion: Transfemoral access to catheterize antegrade branches for supra-aortic vessels is feasible using a large steerable sheath in branched endovascular arch repair.

A simple way for producing holographic filters suitable for image improvement

1978 ◽  
Vol 36 (1) ◽  
pp. 226-227
Author(s):  
K.-H. Herrmann ◽  
E. Reuber ◽  
P. Schiske
Keyword(s):  
Transfer Functions ◽  
Diffraction Order ◽  
Lateral Position ◽  
Simple Method ◽  
Spatial Frequencies ◽  
Resolution Electron ◽  
Wiener Filters ◽  
Image Improvement ◽  
Optical Reconstruction ◽  
Set Up

Aposteriori deblurring of high resolution electron micrographs of weak phase objects can be performed by holographic filters [1,2] which are arranged in the Fourier domain of a light-optical reconstruction set-up. According to the diffraction efficiency and the lateral position of the grating structure, the filters permit adjustment of the amplitudes and phases of the spatial frequencies in the image which is obtained in the first diffraction order.In the case of bright field imaging with axial illumination, the Contrast Transfer Functions (CTF) are oscillating, but real. For different imageforming conditions and several signal-to-noise ratios an extensive set of Wiener-filters should be available. A simple method of producing such filters by only photographic and mechanical means will be described here.A transparent master grating with 6.25 lines/mm and 160 mm diameter was produced by a high precision computer plotter. It is photographed through a rotating mask, plotted by a standard plotter.

Rotary Beveling for In Situ Thin-Section Microscopy of Cell Cultures

1981 ◽  
Vol 39 ◽  
pp. 550-551
Author(s):  
Dean A. Handley ◽  
Jack T. Alexander ◽  
Shu Chien
Keyword(s):  
Cell Growth ◽  
Cell Cultures ◽  
Molecular Interactions ◽  
Convenient Method ◽  
Petri Dish ◽  
Simple Method ◽  
Thin Section Microscopy ◽  
Thin Sectioning ◽  
Organic Fluids

In situ preparation of cell cultures for ultrastructural investigations is a convenient method by which fixation, dehydration and embedment are carried out in the culture petri dish. The in situ method offers the advantage of preserving the native orientation of cell-cell interactions, junctional regions and overlapping configurations. In order to section after embedment, the petri dish is usually separated from the polymerized resin by either differential cryo-contraction or solvation in organic fluids. The remaining resin block must be re-embedded before sectioning. Although removal of the petri dish may not disrupt the native cellular geometry, it does sacrifice what is now recognized as an important characteristic of cell growth: cell-substratum molecular interactions. To preserve the topographic cell-substratum relationship, we developed a simple method of tapered rotary beveling to reduce the petri dish thickness to a dimension suitable for direct thin sectioning.

Development of a simple method for the determination of single nucleotide polymorphisms

2010 ◽  
Vol 34 (8) ◽  
pp. S75-S75
Author(s):  
Weifeng Zhu ◽  
Zhuoqi Liu ◽  
Daya Luo ◽  
Xinyao Wu ◽  
Fusheng Wan
Keyword(s):  
Single Nucleotide Polymorphisms ◽  
Nucleotide Polymorphisms ◽  
Simple Method ◽  
Single Nucleotide
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