scholarly journals Routine pelvic magnetic resonance venography in duplex-confirmed lower limb venous reflux of a suspected pelvic origin does not change clinical management

2014 ◽  
Vol 12 ◽  
pp. S111
Author(s):  
Guy Martin ◽  
Tatiana Martin ◽  
Sandip Sarkar
Keyword(s):  
Magnetic Resonance ◽  
Lower Limb ◽  
Clinical Management ◽  
Magnetic Resonance Venography ◽  
Venous Reflux

The video demonstrates the 3-dimensional noncontrast magnetic resonance venography of lower limb venous malformation.

ASVIDE ◽  
2021 ◽  
Vol 8 ◽  
pp. 324-324
Author(s):  
Yin-Chen Hsu ◽  
Yao-Kuang Huang ◽  
Yuan-Hsi Tseng ◽  
Pang-Yen Chen ◽  
Chao-Ming Wu ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Lower Limb ◽  
Venous Malformation ◽  
Magnetic Resonance Venography ◽  
3 Dimensional

Use of magnetic resonance venography for inferior petrosal sinus sampling

2021 ◽  
pp. 112972982199726
Author(s):  
Kikutaro Tokairin ◽  
Toshiya Osanai ◽  
Noriyuki Fujima ◽  
Kinya Ishizaka ◽  
Hiroaki Motegi ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Radiation Dose ◽  
Interventional Procedure ◽  
Anatomical Variations ◽  
Magnetic Resonance Venography ◽  
University Hospital ◽  
Inferior Petrosal Sinus ◽  
Success Rates ◽  
Intravenous Catheter ◽  
Patient Demographics

Background: Inferior petrosal sinus (IPS) sampling (IPSS) is a transvenous interventional procedure performed to diagnose Cushing’s disease. The reported IPSS failure rate is approximately 10% because IPS catheter delivery is conducted blindly and is challenging because of IPS anatomical variations. This study aimed to evaluate the usefulness of preprocedural magnetic resonance venography (MRV) for assessing IPS access routes before IPSS. Methods: Nineteen consecutive patients who underwent IPSS at a single university hospital in Japan were retrospectively studied. A preprocedural MRV protocol optimized to visualize the IPS before IPSS was established and utilized in the eight most recent cases. An IPSS procedure was considered successful when bilateral IPS catheterization was accomplished. Patient demographics, IPSS success rate, and radiation dose required during IPSS were compared between two groups: MRV group ( N = 8) and no-MRV group ( N = 11) before IPSS. Results: There were no significant differences in age, sex, and IPSS success rates between the groups. The average radiation dose was 663.6 ± 246.8 (SD) mGy and 981.7 ± 389.5 (SD) mGy in the MRV group and no-MRV group, respectively. Thus, there was a significant reduction in radiation exposure in the MRV group ( p = 0.044). Catheterization of the left IPS was unsuccessful in only one patient in the MRV group owing to IPS hypoplasty, as found on the MRV. Conclusions: Hypoplastic IPSs occur in patients and can complicate IPSS. Preprocedural MRV assessment is useful for understanding venous anatomy and preventing unnecessary intravenous catheter manipulation during IPSS, which involves blind manipulation around the IPS.

Predicting composition of leg sections with anthropometry and bioelectrical impedance analysis, using magnetic resonance imaging as reference

1999 ◽  
Vol 96 (6) ◽  
pp. 647-657 ◽  
Author(s):  
N. J. FULLER ◽  
C. R. HARDINGHAM ◽  
M. GRAVES ◽  
N. SCREATON ◽  
A. K. DIXON ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Adipose Tissue ◽  
Magnetic Resonance ◽  
Coefficient Of Variation ◽  
Lower Limb ◽  
Bioelectrical Impedance Analysis ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Tissue Composition ◽  
Resonance Imaging

Magnetic resonance imaging (MRI) was used to evaluate and compare with anthropometry a fundamental bioelectrical impedance analysis (BIA) method for predicting muscle and adipose tissue composition in the lower limb. Healthy volunteers (eight men and eight women), aged 41 to 62 years, with mean (S.D.) body mass indices of 28.6 (5.4) kg/m2 and 25.1 (5.4) kg/m2 respectively, were subjected to MRI leg scans, from which 20-cm sections of thigh and 10-cm sections of lower leg (calf) were analysed for muscle and adipose tissue content, using specifically developed software. Muscle and adipose tissue were also predicted from anthropometric measurements of circumferences and skinfold thicknesses, and by use of fundamental BIA equations involving section impedance at 50 kHz and tissue-specific resistivities. Anthropometric assessments of circumferences, cross-sectional areas and volumes for total constituent tissues matched closely MRI estimates. Muscle volume was substantially overestimated (bias: thigh, -40%; calf, -18%) and adipose tissue underestimated (bias: thigh, 43%; calf, 8%) by anthropometry, in contrast to generally better predictions by the fundamental BIA approach for muscle (bias: thigh, -12%; calf, 5%) and adipose tissue (bias: thigh, 17%; calf, -28%). However, both methods demonstrated considerable individual variability (95% limits of agreement 20–77%). In general, there was similar reproducibility for anthropometric and fundamental BIA methods in the thigh (inter-observer residual coefficient of variation for muscle 3.5% versus 3.8%), but the latter was better in the calf (inter-observer residual coefficient of variation for muscle 8.2% versus 4.5%). This study suggests that the fundamental BIA method has advantages over anthropometry for measuring lower limb tissue composition in healthy individuals.

Does imaging of the olfactory tract change the clinical management of patients with olfactory disturbance? A case series of 100 consecutive patients

2014 ◽  
Vol 128 (9) ◽  
pp. 810-813 ◽  
Author(s):  
J Powell ◽  
M Reda Elbadawey ◽  
I Zammit-Maempel
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Clinical Management ◽  
Case Series ◽  
Olfactory Dysfunction ◽  
Case Review ◽  
Resonance Imaging ◽  
Cross Sectional ◽  
Olfactory Tract ◽  
Cross Sectional Imaging

AbstractBackground:Isolated olfactory dysfunction is a common complaint; the vast majority of cases are benign and untreatable. A common dilemma is whether to image the olfactory tract of affected patients.Methods:A case review of 100 consecutive patients who underwent magnetic resonance imaging for the primary complaint of olfactory dysfunction was performed. Patients with a diagnosis of chronic rhinosinusitis, with or without nasal polyps, were excluded.Results:Magnetic resonance imaging abnormalities that were considered clinically relevant to the presentation of olfactory dysfunction were found in only seven patients (7 per cent). Of these, only one patient (1 per cent) had an abnormality found that altered their clinical management. A comparison of the findings for children (less than 16 years old,n = 5) with those for adults (equal to or more than 16 years old,n = 95) revealed that 4 per cent of adults scanned had olfactory-related pathology diagnosed, as opposed to 60 per cent of children.Conclusion:Cross-sectional imaging may not be necessary in most patients with olfactory dysfunction. Imaging adds little to the patient history and clinical examination findings.

scholarly journals Lifestyle risk factors for lower limb venous reflux in the general population: Edinburgh Vein Study

2001 ◽  
Vol 30 (4) ◽  
pp. 846-852 ◽  
Author(s):  
FGR Fowkes ◽  
AJ Lee ◽  
CJ Evans ◽  
PL Allan ◽  
AW Bradbury ◽  
...  
Keyword(s):  
Risk Factors ◽  
General Population ◽  
Lower Limb ◽  
Venous Reflux ◽  
Lifestyle Risk Factors ◽  
Lifestyle Risk

Safety and Validity of Mechanical Thrombectomy and Thrombolysis on Severe Cerebral Venous Sinus Thrombosis

Neurosurgery ◽  
2013 ◽  
Vol 72 (5) ◽  
pp. 730-738 ◽  
Author(s):  
Guangwen Li ◽  
Xianwei Zeng ◽  
Mohammed Hussain ◽  
Ran Meng ◽  
Yi Liu ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Treatment Modality ◽  
Mechanical Thrombectomy ◽  
Sinus Thrombosis ◽  
Cerebral Venous Sinus Thrombosis ◽  
Magnetic Resonance Venography ◽  
Venous Sinus ◽  
Venous Sinus Thrombosis ◽  
Digital Subtract Angiography

Abstract BACKGROUND: Although the majority of patients with cerebral venous sinus thrombosis (CVST) obtain an optimistic clinical outcome after heparin or warfarin treatment, there remains a subgroup of patients who do not respond to conventional anticoagulation treatment. These patients, especially younger people, as documented by hospital-based studies, have a high morbidity and mortality rate. OBJECTIVE: To verify the safety and efficacy of a dual mechanical thrombectomy with thrombolysis treatment modality option in patients with severe CVST. METHODS: Fifty-two patients diagnosed with CVST were enrolled and treated with mechanical thrombectomy combined with thrombolysis. Patients underwent urokinase 100 to 1500 × 103 IU intravenous sinus injection via a jugular catheter after confirming diagnoses of CVST by using either magnetic resonance imaging/magnetic resonance venography or digital subtract angiography. Information obtained on the patients included recanalization status of venous sinuses as evaluated by magnetic resonance venography or digital subtract angiography at admission, during operation, and at 3- and 6-month follow-up after treatment. RESULTS: The percentage of patients that showed complete and partial recanalization were 87% and 6%, respectively, after mechanical thrombectomy combined with thrombolysis treatment; 8% of the patients showed no recanalization. The modified Rankin Scale scores were 1.0 ± 0.9, 0.85 ± 0.63, and 0.37 ± 0.53 for discharge, and 3- and 6-month follow-up, respectively. A total of 6 patients died despite receiving aggressive treatment. No cases of relapse occurred after 3 to 6 months of follow-up. CONCLUSION: Thrombectomy combined with thrombolysis is a safe and valid treatment modality to use in severe CVST cases or in intractable patients that have shown no adequate response to antithrombotic drugs.

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