Venoactive drugs (diosmin, hesperidin, horse chestnut seed extract) may be considered as adjuncts to compression for symptomatic relief in countries where available
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- Mar 2026
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accessmedicine.mhmedical.com accessmedicine.mhmedical.com
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Endovenous Thermal Ablation (RFA/EVLA)
Relative contraindications include inappropriate vein size, with veins <2 mm and >15 mm representing potential contraindications for RFA specifically. [1] A history of superficial thrombophlebitis resulting in a partially obstructed saphenous vein may preclude thermal ablation. [1] Significant tortuosity of the GSV on duplex examination can make catheter delivery difficult.
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- Vein diameter: Thermal ablation (EVLA or RFA) is preferred for large veins >10 mm in diameter, as nonthermal techniques show lower success rates in this population. [5] Conversely, veins <2 mm may not be suitable for some thermal ablation devices. [6] Vein location and depth: Veins located <0.5 cm from the skin surface have increased risk of thermal injury with traditional thermal ablation. [5] For these superficial veins, nonthermal techniques (cyanoacrylate, mechanochemical ablation) or miniphlebectomy/limited stripping are preferred. [5] Below-knee reflux: Patients with below-knee GSV reflux benefit from ablation to the lowest point of reflux, but nonthermal techniques are preferred to avoid thermal nerve injury.
- Special considerations apply to below-knee GSV ablation, where nonthermal techniques are preferred to avoid thermal nerve injury. [3] For large nonaneurysmal saphenous veins >10 mm, thermal ablation with EVLA or RFA should be performed rather than nonthermal techniques. [3]
- Anatomic contraindications include saphenous veins located <0.5 cm from the skin surface, which carry high risk of skin burns, hyperpigmentation, and induration despite tumescent anesthesia
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accessmedicine.mhmedical.com accessmedicine.mhmedical.com
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Selection
Initial Assessment: Transthoracic echocardiography (TTE) is recommended at diagnosis to assess aortic valve anatomy, valve function, and thoracic aortic diameters. CT or MRI is reasonable for comprehensive anatomic assessment. [1]
Surveillance Imaging: The choice depends on aneurysm location: [2]
Aortic root/proximal ascending aorta: TTE can be used if measurements correlate well with CT/MRI
Mid-ascending, arch, or descending thoracic aorta: CT or MRI is recommended
MRI is preferred for long-term surveillance to avoid cumulative radiation exposure from serial CT scans [1][3]
Surveillance Intervals
Size-Based Recommendations: [2-4]
<4.0 cm: Every 2-3 years if stable
4.0-4.4 cm: Every 2 years
4.5-4.9 cm: Annually
5.0-5.4 cm: Every 6-12 months (consider optimization for repair)
≥5.5 cm: Surgical evaluation indicated
Initial surveillance: Obtain follow-up imaging at 6-12 months after diagnosis to establish the growth rate. If stable, adjust interval based on size. [1]
Growth rate considerations: Descending thoracic aneurysms grow faster than ascending aneurysms (mean 2.76 mm/year vs 1 mm/year overall). Growth accelerates exponentially above 4.5 cm diameter. [3-4]
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Any patient with chest or back pain with a known or suspected thoracic aorta aneurysm must be brought to the hospital and undergo urgent imaging studies to rule out the aneurysm as a cause of the pain
elective surgical repair is suggested at 5.5 cm in patients without underlying connective tissue disorders, with earlier intervention at 4.5-5.0 cm in patients with connective tissue disorders or bicuspid aortic valve
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- Growth rate considerations: Descending thoracic aneurysms grow faster than ascending aneurysms (mean 2.76 mm/year vs 1 mm/year overall). Growth accelerates exponentially above 4.5 cm diameter
- Type A dissection is almost always repaired given the risk of extension and rupture, with published evidence showing improved outcomes compared with conservative management. [1] For type B dissections, complicated cases are considered for repair, while uncomplicated acute type B aortic dissection is usually managed with antihypertensives and surveillance, with in-hospital mortality between 1-10%. [1] However, patients with uncomplicated acute type B dissection and high-risk features (aortic diameter >4.4 cm, false lumen diameter >2.2 cm, or age >60 years) carry increased mortality risk and are increasingly considered for thoracic endovascular aortic repair (TEVAR
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- Jul 2024
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docdrop.org docdrop.org
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in the case of the new world the the the maize plant the wild maize plant had a little cob on it that was only about one centimeter long
for - corn - thousands of years to breed from 1 cm cob to present size - transition - stone age to agriculture - importance of women
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- May 2023
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A UE in CM-CONNECTED state can be in RRC Inactive state
Possible case
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www.techplayon.com www.techplayon.com
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CM-Connected
has signaling connection
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N1 logical interface and it is combination of following
N1 logical interface
UE <==RRC ==>gNB<==N2-AP==>AMF
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Washington | Australia is in pole position to benefit from a sixfold increase in demand for so-called “critical minerals” worth $US12.9 trillion ($17.6 trillion) over the next two decades, driven by the race to hit net zero emissions, according to analysis from the International Monetary Fund.
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- Feb 2023
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vocab.linkeddata.es vocab.linkeddata.es
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