Overcoming the problem of tortuous vessel negotiation

1984 ◽  
Vol 10 (3) ◽  
pp. 303-304
Author(s):  
Dennis A. Bloomfield
Keyword(s):  
Tortuous Vessel

scholarly journals Stenting Both before and after Coiling of a Ruptured Fusiform Basilar Aneurysm to Overcome Mechanical Occlusion Caused by Thrombosis within the Coil Mass

2009 ◽  
Vol 15 (1) ◽  
pp. 117-122
Author(s):  
B. Varjavand
Keyword(s):  
Vessel Anatomy ◽  
Before And After ◽  
Tortuous Vessel

Tortuous vessel anatomy reconstructed by stent-assisted coiling may be kinked by thrombus expansion within the coil mass. This can be overcome by placement of a second stent.

Accordion effect: A red herring during percutaneous angioplasty of arteriovenous dialysis access

2020 ◽  
pp. 112972982092724
Author(s):  
Indu Ramachandra Rao ◽  
Ganesh Paramasivam ◽  
Tom Devasia ◽  
Attur Ravindra Prabhu ◽  
Shankar Prasad Nagaraju
Keyword(s):  
Arteriovenous Fistula ◽  
Endovascular Procedures ◽  
Coronary Vessels ◽  
Dialysis Access ◽  
Arteriovenous Graft ◽  
Percutaneous Angioplasty ◽  
Stenotic Lesion ◽  
Accordion Effect ◽  
Stiff Guidewire ◽  
Tortuous Vessel

Accordion or concertina effect is the angiographic appearance of pseudostenosis caused by interaction of a stiff guidewire with a tortuous vessel during endovascular procedures. This phenomenon may often mislead the interventionist into performing unnecessary and potentially harmful procedures in a bid to treat the ‘stenotic’ lesion. The resolution of ‘stenosis’ on withdrawal of the guidewire clinches the diagnosis. While well described in coronary vessels, the occurrence of this phenomenon in arteriovenous fistula or graft has not been reported. We describe a case of accordion effect observed during endovascular intervention for arteriovenous graft salvage.

Bowstring Phenomenon in Renal Artery Aneurysm Exclusion Using a Viabahn Stent Graft

2020 ◽  
pp. 153857442097555
Author(s):  
Atsushi Saiga ◽  
Masayoshi Yamamoto ◽  
Hiroshi Kondo ◽  
Yoshihiro Kubota ◽  
Takeshi Wada ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Renal Artery ◽  
Stent Graft ◽  
Incidental Finding ◽  
Artery Aneurysm ◽  
Original Position ◽  
Renal Artery Aneurysm ◽  
Main Renal Artery ◽  
Wide Neck ◽  
Tortuous Vessel

A 77-year-old man presented with an incidental finding of right renal artery aneurysm without symptoms. Computed tomography revealed a 22 mm saccular aneurysm with a wide neck at the main renal artery trunk. An 8 × 100 mm Viabahn stent graft (W. L. Gore, Flagstaff, AZ) was deployed by fully pulling back the guiding sheath. However, the deployment knob was not able to be pulled. We returned the guiding sheath to the original position and confirmed the cause was the bowstring phenomenon. Because avoidance of this phenomenon required straightening of the tortuous vessel, the stent graft was deployed by short pull-back of the guiding sheath. Computed tomography after a year revealed no opacification of the aneurysm and the patency of the stent graft.

scholarly journals Dopplervelocimetric evaluation of portal vein as a diagnostic tool for portosystemic shunt diagnosis in dogs

2009 ◽  
Vol 39 (5) ◽  
pp. 1433-1437 ◽  
Author(s):  
Cibele Figueira Carvalho ◽  
Giovanni Guido Cerri ◽  
Maria Cristina Chammas
Keyword(s):  
Portal Vein ◽  
Flow Velocity ◽  
Vena Cava ◽  
Portosystemic Shunt ◽  
Portal Flow ◽  
Liver Size ◽  
Hemodynamic Assessment ◽  
Duplex Doppler ◽  
Clinical Records ◽  
Tortuous Vessel

The objective of this research was to verify if the study of portal hemodynamic parameters through duplex Doppler ultrasonography (DUS) is able to help to detect portosystemic shunt (PSS) and the shunted vessel origin. It was detected PSS in 20 dogs by abdominal DUS and confirmed at surgery or necropsy from March of 2004 until March 2007. Main ultrasonographic findings were: identification of a tortuous vessel shunting portal flow being: portocaval shunt (16/20 or 80%), esplenocaval shunt (2/20 or 10%), gastrocaval shunt (1/20 or 5%), portoazigo shunt (1/20 or 5%); 2) elevated portal flow velocity before shunt (17/20 or 81%), 3) lower portal flow velocity after shunt (17/20 or 81%), 4) turbulence in the caudal vena cava (10/20 or 47,5%) and 5) reduced liver size (15/20 or 71%). The others ultrasonographic findings associated with clinical records were similar to that described in literature. With this work we could conclude that hemodynamic assessment of portal vein with DUS may be a useful tool for PSS diagnosis and to detect the shunted vessel origin.

A Case of Vertebrovertebral Arteriovenous Fistula Presenting with Subarachnoid Haemorrhage

1996 ◽  
Vol 2 (3) ◽  
pp. 229-233 ◽  
Author(s):  
S. Kominami ◽  
Y. Liu ◽  
H. Alvarez ◽  
G. Rodesch ◽  
P. Coubes ◽  
...  
Keyword(s):  
Subarachnoid Haemorrhage ◽  
Arteriovenous Fistula ◽  
Venous Drainage ◽  
Left Vertebral Artery ◽  
Detachable Balloon ◽  
Paediatric Case ◽  
History Of ◽  
Balloon Technique ◽  
Magnetic Resonance Imaging Mri ◽  
Tortuous Vessel

A rare paediatric case of vertebrovertebral arteriovenous fistula presented with a subarachnoid haemorrhage. A 12 year-old boy, who fell on his back at school, presented with a one week history of headache, vomiting, and double vision. Computed tomography (CT) scan revealed subarachnoid haemorrhage. Magnetic resonance imaging (MRI) demonstrated a tortuous vessel on the anterior surface of the spinal cord. Selective angiography showed an arteriovenous fistula of the left vertebral artery at the level of C1. The venous drainage of the fistula refluxed into the medullary vein at the level of C6-7, and drained upwards into the posterior fossa veins. An endovascular detachable balloon technique was employed and complete occlusion of the fistula was achieved.

scholarly journals TCTAP C-148 OCT in a Tortuous Vessel

2015 ◽  
Vol 65 (17) ◽  
pp. S333-S334
Author(s):  
Yi Wei Chung
Keyword(s):  
Tortuous Vessel

scholarly journals Concertina Phenomenon in the Left Anterior Descending Artery: An Unexpected Circumstance in an Unexpected Vessel

2019 ◽  
Author(s):  
Mert İlker Hayıroğlu ◽  
Tufan Çınar ◽  
Ahmet Öz ◽  
Muhammed Keskin
Keyword(s):  
Percutaneous Coronary Intervention ◽  
Coronary Artery ◽  
Guide Wire ◽  
Clinical Status ◽  
Coronary Intervention ◽  
The Third ◽  
Left Anterior Descending Artery ◽  
Elective Percutaneous Coronary Intervention ◽  
Percutaneous Coronary ◽  
Tortuous Vessel

The concertina phenomenon is the occurrence of new and transient angiographic series of pseudolesions in a tortuous vessel induced mainly by a stiff guide wire. Here, we describe a 53-year-old man who experienced a concertina effect in the left anterior descending coronary artery (LAD) during an elective percutaneous coronary intervention. After the diagnosis of the concertina phenomenon in the LAD, a percutaneous coronary intervention was performed following the withdrawal of the soft guide wire to the mid level of the LAD. After the intervention, the patient remained in very good clinical status and was discharged on the third postprocedural day.  

A New Technique for the Surgical Creation of Aneurysms in an In Vivo Tortuous Vessel Model to Test Neurovascular Devices

2008 ◽  
Vol 21 (1) ◽  
pp. 39-45 ◽  
Author(s):  
Jennifer Arends ◽  
Keith D. Perkins ◽  
Ji Zhang ◽  
Igor Polyakov ◽  
Elaine Lee
Keyword(s):  
New Technique ◽  
A New Technique ◽  
Tortuous Vessel
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