scholarly journals High-frequency ultrasonography of psoriatic skin: A non-invasive technique in the evaluation of the entire skin of patients with psoriasis: A pilot study

2019 ◽  
Author(s):  
Mihaela Șomlea ◽  
Andreea Boca ◽  
Alexandra Pop ◽  
Roxana Ilieș ◽  
Stefan Vesa ◽  
...  
Keyword(s):  
Pilot Study ◽  
High Frequency ◽  
Invasive Technique ◽  
Psoriatic Skin ◽  
Non Invasive ◽  
High Frequency Ultrasonography

The role of ultrasonography in diagnosing hourglass-like fascicular constriction(s) of the anterior interosseous nerve

2021 ◽  
pp. 028418512110529
Author(s):  
Tiezheng Wang ◽  
Hengtao Qi ◽  
Dehua Wang ◽  
Zengtao Wang ◽  
Shougang Bao ◽  
...  
Keyword(s):  
Median Nerve ◽  
High Frequency ◽  
Imaging Method ◽  
Upper Arm ◽  
Non Invasive ◽  
The Past ◽  
Anterior Interosseous Nerve ◽  
High Frequency Ultrasonography ◽  
Electrophysiological Examination

Background In the past, the diagnosis of hourglass-like fascicular constriction(s) of the anterior interosseous nerve mostly depended on electrophysiological examination, by which the location could not be diagnosed. There are few studies on the evaluation of hourglass-like fascicular constriction(s) by ultrasonography. Purpose To evaluate the role of ultrasonography in the diagnosis of hourglass-like fascicular constriction(s) of the anterior interosseous nerve. Material and Methods A retrospective analysis of 12 patients with hourglass-like fascicular constriction(s) of the anterior interosseous nerve was carried out, and the characteristics of the high-frequency ultrasonographic images were summarized and compared with surgical exploration. Results The 12 cases of hourglass-like fascicular constriction(s) of the anterior interosseous nerve were all located in the median nerve of the distal upper arm, including nine cases of single hourglass-like fascicular constriction and three cases of multiple hourglass-like fascicular constrictions. High-frequency ultrasonography can accurately locate the hourglass-like fascicular constriction(s) of the anterior interosseous nerve and the extent of neuropathy. The ultrasonographic images of hourglass-like fascicular constriction(s) of the anterior interosseous nerve showed single or multiple hourglass-like change(s) in the median nerve of the distal upper arm. The nerve fascicles on both sides of the affected nerve with hourglass-like change thickened. Conclusions High-frequency ultrasonography could be a reliable, convenient, and non-invasive diagnostic imaging method for hourglass-like fascicular constriction(s) of the anterior interosseous nerve.

scholarly journals High-Frequency Ultrasonography and Evaporimetry in Non-invasive Evaluation of the Nail Unit

2021 ◽  
Vol 8 ◽  
Author(s):  
Marta Szymoniak-Lipska ◽  
Adriana Polańska ◽  
Dorota Jenerowicz ◽  
Adam Lipski ◽  
Ryszard Żaba ◽  
...  
Keyword(s):  
High Frequency ◽  
Complex Structure ◽  
Plate Thickness ◽  
Nail Plate ◽  
Structure And Function ◽  
Dominant Hand ◽  
Entire Study ◽  
Non Invasive ◽  
High Frequency Ultrasonography ◽  
And Function

Background: The nail unit (NU) is a complex structure that performs a number of functions, including protection, defense, manipulation, and palpation. Non-invasive research methods can facilitate the recognition of NU structure and function. Evaporimetry and HF-USG due to their availability of equipment and low research costs seem to be particularly noteworthy, but so far have been assessed to a limited extent. The aim of the presented study was to check the usefulness of TOWL and HF-USG in examination of NU.Materials and Methods: A total of 58 volunteers aged 25–65 years (mean age: 41 ± 10.16 years) were qualified for the study. The subjects did not present symptoms of clinically evident onychopathy and did not suffer from any dermatoses associated with lesions occurring within the NU. Additionally, the patients did not suffer from systemic diseases that could affect NU (including heart, lung, and endocrine diseases). In all volunteers, the measurement of TOWL and 20 MHz ultrasonography [high-frequency ultrasonography (HF-USG)] with the special emphasis on determination of nail plate thickness were performed.Results: Analysis of 464 HF-USG images revealed that the nail plate presented as two hyperechoic, parallel streaks (railway sign) with a linear hypoechoic middle layer between them. Matrix was visualized as a hypoechoic structure with blurred boundaries, mostly within the fourth and fifth fingers and more often in women. We found statistically significant correlations between the type of a finger and the thickness of the nail plate both in the entire study group and taking into account gender. In the dominant hand, the results were r = −0.341; p < 0.001; r = −0.417, p < 0.001; and r = 0.337; p = 0.001 (for the whole group, for women, and for men, respectively). In the non-dominant hand, the results were r = −0.465; p < 0.001; r = −0.493, p < 0.01; and r = −0.503; p < 0.01 (for the whole group, for women, and for men, respectively). There were statistically significant differences in the thickness of the nail plates of the corresponding types of fingers between female and male NUs. Statistically significant correlations were found between the type of a finger and the TOWL value in the whole group and taking into account gender (p < 0.05), except for the non-dominant hand in men. There were no statistically significant differences in the TOWL values of the corresponding types of fingers between male and female NUs (p > 0.05). There was no statistically significant correlation between the TOWL value and the nail plate thickness in any of the tested NUs, apart from the one statistically significant correlation in nd5 (r = 0.390, p = 0.021).Conclusions: To sum up, non-invasive methods, such as HF-USG and TOWL, enable assessment of the NU and are useful in examination of its structure and function. HF-USG shows characteristic elements of NUs that can be distinguished because of differences in their echogenicity. The thickness of the nail plate and TOWL depend on the type of finger, and show a relationship with gender.

scholarly journals Thoracic electrical bioimpedance in the follow-up of patients with cardiovascular disorders

2005 ◽  
Vol 133 (5-6) ◽  
pp. 297-302
Author(s):  
Vesna Stojanov ◽  
Mirko Saranovic ◽  
Branko Jakovljevic ◽  
Katarina Paunovic
Keyword(s):  
High Frequency ◽  
Invasive Technique ◽  
Non Invasive ◽  
Arterial Blood ◽  
Thoracic Electrical Bioimpedance ◽  
Patients With Heart Failure ◽  
Before And After ◽  
Electrical Bioimpedance ◽  
Low Amplitude

Thoracic electrical bioimpedance is a new non-invasive technique for obtaining haemodynamic parameters. The method involves the passing of low amperage, high frequency current through the thorax. The current induces a change of resistance within the thorax, which is registered by electrodes. The overall impedance of the thorax is a measure of the electrical resistance of the thorax to this high frequency, low amplitude current. In clinical practice, thoracic electrical bioimpedance has been applied in diagnostic, therapeutic, and prognostic use in patients with heart failure and hypertension, patients with pacemakers, within the scope of early diagnosis of implant rejection following heart transplantation, as well as in patients with kidney disorders, before and after dialysis. However, one of its most important applications is in the determination of antihypertensive therapy, because it provides the parameters that reflect the genesis of arterial blood pressure, in assessing these parameters, optimal therapy adjusted to the haemodynamic status of each patient can be prescribed.

High‐frequency ultrasonography—New non‐invasive method in assessment of skin lymphomas

2018 ◽  
Vol 24 (3) ◽  
pp. 517-521 ◽  
Author(s):  
A. Polańska ◽  
A. Dańczak‐Pazdrowska ◽  
K. Olek‐Hrab ◽  
A. Osmola‐Mańkowska ◽  
M. Bowszyc‐Dmochowska ◽  
...  
Keyword(s):  
High Frequency ◽  
Non Invasive ◽  
Invasive Method ◽  
High Frequency Ultrasonography

scholarly journals Line-Field Confocal Optical Coherence Tomography May Enhance Monitoring of Superficial Basal Cell Carcinoma Treated with Imiquimod 5% Cream: A Pilot Study

Cancers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 4913
Author(s):  
Anna Elisa Verzì ◽  
Giuseppe Micali ◽  
Francesco Lacarrubba
Keyword(s):  
Optical Coherence Tomography ◽  
Pilot Study ◽  
Basal Cell Carcinoma ◽  
Cell Carcinoma ◽  
Basal Cell ◽  
Invasive Technique ◽  
Optical Coherence ◽  
Line Field ◽  
Non Invasive ◽  
Superficial Basal Cell Carcinoma

Line-field confocal optical coherence tomography (LC-OCT) is a novel, non-invasive technique for real-time skin imaging. Imiquimod (IQ) 5% cream is an immune response modifier currently approved for the treatment of small, superficial basal cell carcinoma (BCC). The aim of this study was to investigate if LC-OCT may be useful to enhance the treatment monitoring of BCC. Twenty superficial BCCs from 12 patients were treated with IQ 5% cream once daily, five days a week, for six weeks. Clinical and LC-OCT evaluations were performed at baseline and 4 weeks after the end of treatment. At the end of the study, 13 lesions showed a complete clinical and LC-OCT response, 4 lesions a partial clinical and LC-OCT response, and 3 lesions a complete clinical response but residual tumoral signs at LC-OCT. Our pilot study suggests that LC-OCT may represent a promising tool able to enhance the evaluation of the treatment response of BCCs to non-invasive treatments. In our case series, its use highlighted, through a detailed, fast, and complete examination of the treated area, three cases of residual BCC that otherwise would have gone undetected at clinical examination. Future studies on larger series of patients treated with different modalities and with a longer follow-up are advisable.

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