Unimolecular Chemo-fluoro-luminescent Reporter for Crosstalk-Free Duplex Imaging of Hepatotoxicity

2019 ◽  
Vol 141 (27) ◽  
pp. 10581-10584 ◽  
Author(s):  
Penghui Cheng ◽  
Qingqing Miao ◽  
Jingchao Li ◽  
Jiaguo Huang ◽  
Chen Xie ◽  
...  
Keyword(s):  
Duplex Imaging

Recurrent varicose veins below the knee after varicose vein surgery

Phlebologie ◽  
2007 ◽  
Vol 36 (03) ◽  
pp. 132-136
Author(s):  
M. W. de Haan ◽  
J. C. J. M. Veraart ◽  
H. A. M. Neumann ◽  
P. A. F. A. van Neer
Keyword(s):  
Varicose Vein ◽  
Varicose Veins ◽  
Varicose Vein Surgery ◽  
Proximal Point ◽  
Perforating Veins ◽  
Recurrent Varicose Veins ◽  
Below The Knee ◽  
Duplex Imaging ◽  
Additional Value

SummaryThe objectives of this observational study were to investigate whether varicography has additional value to CFDI in clarifying the nature and source of recurrent varicose veins below the knee after varicose vein surgery and to investigate the possible role of incompetent perforating veins (IPV) in these recurrent varicose veins. Patients, material, methods: 24 limbs (21 patients) were included. All patients were assessed by a preoperative clinical examination and CFDI (colour flow duplex imaging). Re-evaluation (clinical and CFDI) was done two years after surgery and varicography was performed. Primary endpoint of the study was the varicographic pattern of these visible varicose veins. Secondary endpoint was the connection between these varicose veins and incompetent perforating veins. Results: In 18 limbs (75%) the varicose veins were part of a network, in six limbs (25%) the varicose vein appeared to be a solitary vein. In three limbs (12.5%) an incompetent sapheno-femoral junction was found on CFDI and on varicography in the same patients. In 10 limbs (41%) the varicose veins showed a connection with the persistent below knee GSV on varicography. In nine of these 10 limbs CFDI also showed reflux of this below knee GSV. In four limbs (16%) the varicose veins showed a connection with the small saphenous vein (SSV). In three limbs this reflux was dtected with CFDI after surgery. An IPV was found to be the proximal point of the varicose vein in six limbs (25%) and half of these IPV were detected with CFDI as well. Conclusion: Varicography has less value than CFDI in detecting the source of reflux in patients with recurrent varicose veins after surgery, except in a few cases where IPV are suspected to play a role and CFDI is unable to detect these IPV.

Role of Duplex Imaging in Endovenous Obliteration for Primary Venous Insufficiency

2000 ◽  
Vol 7 (6) ◽  
pp. 451-459 ◽  
Author(s):  
Olivier Pichot ◽  
Carmine Sessa ◽  
James G. Chandler ◽  
Michel Nuta ◽  
Michel Perrin
Keyword(s):  
Venous Insufficiency ◽  
Duplex Imaging

A Review of Current Noninvasive Imaging Surveillance Practices for Deep Venous Arterialization Procedures

2021 ◽  
pp. 154431672199694
Author(s):  
Qi Yan ◽  
John A. Treffalls ◽  
Lucas Ferrer ◽  
Mark G. Davies
Keyword(s):  
Animal Studies ◽  
Case Reports ◽  
Peak Systolic Velocity ◽  
Volume Measurement ◽  
Free Standing ◽  
Common Procedure ◽  
Venous Valves ◽  
Language Studies ◽  
Duplex Imaging ◽  
Percutaneous Revascularization

Venous arterialization is an increasingly common procedure performed in patients with critical limb-threatening ischemia (CLTI) where there are no open or percutaneous revascularization options. This study aims to review the imaging follow-up for venous arterialization described in the literature. A systematic review was performed on venous arterialization studies for CLTI using the PRISMA methodology. A literature search was performed on 5 databases from inception. We included all original studies, case reports, and reviews regarding venous arterialization for all pathologies. We excluded free standing abstracts, animal studies, other than lower extremity, and foreign language studies. Our search strategy yielded 23 studies that met inclusion criteria, with 16 studies reporting a specific value from at least one surveillance imaging methodology. Most studies used Duplex imaging (16 studies) and TCPo2 (9 studies). Only 9 studies provided any detail regarding the Duplex findings. One study used focal peak systolic velocity (PSV) gradient (PSV at the lesion in the graft divided by PSV in a proximal segment of the graft) above 2.5 as an indicator for flow-inhibiting venous valves or stenosis in the graft. Another study reported a turbulent flow pattern in the graft, elevating peak velocities to 100 to 200 cm/s throughout the bypass. Four studies reported flow volume measurement through the bypass or in pedal vein ranging from 40 to 437 mL/min. Seven studies reported a mean increase of 18.7 mmHg in TCPo2. Eighty-two percent of patients saw an improvement of TCPo2 in 2 studies. To date, no criteria have been identified that are predictive of the success or failure of deep vein arterialization. Venous arterialization is an increasingly common procedure in the “no-option” diabetic patient. Duplex imaging with TCPo2 offers the most appropriate means of surveillance; however, the literature is sparse with no guidance on normal or critical values.

COLOR DUPLEX IMAGING

Hand Clinics ◽  
1993 ◽  
Vol 9 (1) ◽  
pp. 47-57
Author(s):  
Douglas T. Hutchinson
Keyword(s):  
Duplex Imaging

scholarly journals A rare case of May-Thurner-like syndrome in an elderly lady

2014 ◽  
Vol 1 (2) ◽  
pp. 19
Author(s):  
Kapil Sahnan ◽  
Chris Pui Yan Yee ◽  
Robert Hywel Thomas ◽  
Kaji Sritharan
Keyword(s):  
Iliac Artery ◽  
Common Iliac Artery ◽  
Imaging Modality ◽  
Lumbar Vertebrae ◽  
Kidney Injury ◽  
Iliac Vein ◽  
Common Iliac Vein ◽  
Left Common Iliac Vein ◽  
Extrinsic Compression ◽  
Duplex Imaging

An elderly lady presented with decreased mobility, sputum production and intermittent confusion. She was treated for chest sepsis, fast atrial fibrillation, and acute kidney injury, and also noted to have a swollen left leg. Venous duplex imaging showed extensive thrombus within the left common iliac, left external iliac and left common femoral veins. A CT Venogram showed compression of the left common iliac vein between an osteophyte at L5 and a calcified ipsilateral common iliac artery. It also showed a pelvic kidney with an extra renal pelvis and large renal cyst which was indirectly contributing to venous compression by splinting the left iliac artery. A decision was made after discussion at the Vascular MDT that the patient was not fit enough for surgery and to manage her medically with anticoagulation. Discussion: Proximal DVT’s are rarer than distal thrombosis, but have similar causes. One of the rarer causes of proximal DVT is May-Thurner syndrome and its variants known collectively as non-thrombotic iliac vein lesions. May-Thurner originally described DVT formation caused by extrinsic compression of the left common iliac vein between the overriding contralateral (right) common iliac artery and adjacent lumbar vertebrae. The best imaging modality is a CT Venogram. Duplex ultrasonography can be used, although it can be difficult to visualize the iliac veins. The mainstay of management is surgical thrombectomy, or thrombolysis, followed by stenting of the affected vessel. However, if intervention is not appropriate, then it can be managed medically with anticoagulation. 

Ulnar Artery Aneurysm and Repair

2018 ◽  
Vol 42 (1) ◽  
pp. 30-32 ◽  
Author(s):  
Maria T. Cardinale ◽  
Steven P. Posner ◽  
Kathyrn F. Abernathy
Keyword(s):  
Artery Aneurysm ◽  
Ulnar Artery ◽  
Non Invasive ◽  
Duplex Imaging ◽  
Pulsatile Mass ◽  
Normal Blood Flow ◽  
Hypothenar Eminence ◽  
Blood Flow Velocities ◽  
Flow Velocities

This is a case study of a patient who was presented to the emergency room with ischemia of the left third, fourth and fifth fingers and a pulsatile mass in the hypothenar eminence. Non-invasive arterial exam of the upper extremities was performed bilaterally which resulted in normal pressures and normal blood flow velocities. The arterial duplex imaging was also normal in the subclavian, axillary, brachial, radial and ulnar arteries and also demonstrated triphasic Doppler flow velocities. The technologist scanned distal to the wrist where a branch of the ulnar artery along with the aspect of the palmer arch surface revealed a true aneuryms with both antegrade and retrograde flow. The patient was infused tissue plasminogen activator (TPA) for a total of 72 hours with eventual recanalization of the thrombosed aneurysm. Due to the high risk of limb threat the patient underwent a successful resection of the left ulnar artery aneurysm with vein patch.

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