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1.
Anticancer Res ; 41(11): 5803-5810, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-34732454

RESUMO

BACKGROUND/AIM: Lymph node metastasis is an important prognostic factor in gastric cancer patients. In node-negative (N0) gastric cancer patients, additional prognostic factors are needed to reinforce TNM staging. PATIENTS AND METHODS: We semi-quantitatively recorded the presence of lymphatic, venous, and perineural invasion and evaluated the possibility that they could be used as upstaging factors in N0 gastric cancer by comparing N0 gastric cancer cases with N1 cases. RESULTS: Venous (p<0.001) and perineural (p<0.001) invasion were important factors in the relapse-free survival of N0 patients, but lymphatic invasion was not. N0 cases with venous or perineural invasion had survival curves similar to those of N1 patients. In addition, the number of invasive features (lymphatic, venous, or perineural) was an important factor in predicting poor patient survival. CONCLUSION: Venous and perineural invasion were significant prognostic factors in N0 gastric cancer cases. It is necessary to record lymphatic, venous, and perineural invasion separately in the pathology report, especially in cases of N0 gastric cancer.


Assuntos
Nervos Periféricos/patologia , Neoplasias Gástricas/patologia , Veias/patologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Progressão da Doença , Feminino , Gastrectomia , Humanos , Excisão de Linfonodo , Metástase Linfática , Masculino , Pessoa de Meia-Idade , Invasividade Neoplásica , Recidiva Local de Neoplasia , Estadiamento de Neoplasias , Intervalo Livre de Progressão , Medição de Risco , Fatores de Risco , Neoplasias Gástricas/mortalidade , Neoplasias Gástricas/cirurgia , Fatores de Tempo
2.
Artigo em Chinês | MEDLINE | ID: mdl-34672460

RESUMO

Objective: The arterial blood with the oscillatory information comes from the right heart system after gas exchanging in the lung. However, the evidence of the waveform of venous ABG is lack. The objectives of this article are to compare the different information between arterial and venous beat-by-beat blood sample at the same time. Methods: Six post-operative patients with normal heart function and negative Allen test, had been placed the arterial catheterization and central venous catheterization directly connected to pre-heparin plasticpipes for continuous collecting arterial and venous blood. We twisted the 2 pipes into helix formation. After drawing arterial and venous blood with syringes in one heart beat with one helix at the same time, totally 15 heart beats, clipping the pipes with forceps, we put the helix pipe into icedwater at once and analyses PaO2, PaCO2, pH and SaO2 as soon as possible. We selected two breathscycles of waveform from each patient for data calculations of magnitudes and time interval. Results: The heart beat numbers for drawing blood into pipe were 15~16, and all covered more than 2 breathing cycles. There were significant changes of arterial PaO2(i.e. the highest high values compare to the next lowestvalues, P<0.05), but no significant changes in venous blood(P>0.05). The magnitudes of changing PaO2 in arterial and venous blood sample were (9.96±5.18)mmHg and (1.63±0.41)mmHg with significant variance(P=0.010), and they were (8.09±2.43)% and (3.91±1.22)%from their mean with significant variance(P=0.009) respectively. Conclusion: With continuous beat-by-beat arterial and venous blood sampling and ABG analyzing method at the same time, we obtain a clear evidence of periodic parameters ABG waveform, which following breathing cycle, but no clear ABG waveform of the periodic parameters in the venous blood samples, which implies the oscillatory information of the arterial blood with comes from the gas exchanging in the lung.


Assuntos
Artérias , Corpo Humano , Gasometria , Humanos , Respiração , Veias
3.
Sensors (Basel) ; 21(19)2021 Sep 27.
Artigo em Inglês | MEDLINE | ID: mdl-34640769

RESUMO

Enhancement of captured hand vein images is essential for a number of purposes, such as accurate biometric identification and ease of medical intravenous access. This paper presents an improved hand vein image enhancement technique based on weighted average fusion of contrast limited adaptive histogram equalization (CLAHE) and fuzzy adaptive gamma (FAG). The proposed technique is applied using three stages. Firstly, grey level intensities with CLAHE are locally applied to image pixels for contrast enhancement. Secondly, the grey level intensities are then globally transformed into membership planes and modified with FAG operator for the same purposes. Finally, the resultant images from CLAHE and FAG are fused using improved weighted averaging methods for clearer vein patterns. Then, matched filter with first-order derivative Gaussian (MF-FODG) is employed to segment vein patterns. The proposed technique was tested on self-acquired dorsal hand vein images as well as images from the SUAS databases. The performance of the proposed technique is compared with various other image enhancement techniques based on mean square error (MSE), peak signal-to-noise ratio (PSNR), and structural similarity index measurement (SSIM). The proposed enhancement technique's impact on the segmentation process has also been evaluated using sensitivity, accuracy, and dice coefficient. The experimental results show that the proposed enhancement technique can significantly enhance the hand vein patterns and improve the detection of dorsal hand veins.


Assuntos
Aumento da Imagem , Veias , Mãos/diagnóstico por imagem , Distribuição Normal , Razão Sinal-Ruído , Veias/diagnóstico por imagem
4.
Cochrane Database Syst Rev ; 10: CD012723, 2021 10 12.
Artigo em Inglês | MEDLINE | ID: mdl-34637138

RESUMO

BACKGROUND: Telangiectasias (spider veins) and reticular veins on the lower limbs are very common, increase with age, and have been found in 41% of women. The cause is unknown and the patients may be asymptomatic or can report pain, burning or itching. Treatments include sclerotherapy, laser, intense pulsed light, microphlebectomy and thermoablation, but none is established as preferable. OBJECTIVES: To assess the effects of sclerotherapy, laser therapy, intensive pulsed light, thermocoagulation, and microphlebectomy treatments for telangiectasias and reticular veins. SEARCH METHODS: The Cochrane Vascular Information Specialist searched the Cochrane Vascular Specialised Register, CENTRAL, MEDLINE, Embase, AMED and CINAHL databases, and the World Health Organization International Clinical Trials Registry Platform and ClinicalTrials.gov trials registers to 16 March 2021. We undertook additional searches in LILACS and IBECS databases, reference checking, and contacted specialists in the field, manufacturers and study authors to identify additional studies. SELECTION CRITERIA: We included randomised controlled trials (RCTs) and quasi-RCTs that compared treatment methods such as sclerotherapy, laser therapy, intensive pulsed light, thermocoagulation, and microphlebectomy for telangiectasias and reticular veins in the lower limb. We included studies that compared individual treatment methods against placebo, or that compared different sclerosing agents, foam or laser treatment, or that used a combination of treatment methods. DATA COLLECTION AND ANALYSIS: Three review authors independently performed study selection, extracted data, assessed risks of bias and assessed the certainty of evidence using GRADE. The outcomes of interest were resolution or improvement (or both) of telangiectasias, adverse events (including hyperpigmentation, matting), pain, recurrence, time to resolution, and quality of life. MAIN RESULTS: We included 3632 participants from 35 RCTs. Studies compared a variety of sclerosing agents, laser treatment and compression. No studies investigated intensive pulsed light, thermocoagulation or microphlebectomy. None of the included studies assessed recurrence or time to resolution. Overall the risk of bias of the included studies was moderate. We downgraded the certainty of evidence to moderate or low because of clinical heterogeneity and imprecision due to the wide confidence intervals (CIs) and few participants for each comparison. Any sclerosing agent versus placebo There was moderate-certainty evidence that sclerosing agents showed more resolution or improvement of telangiectasias compared to placebo (standard mean difference (SMD) 3.08, 95% CI 2.68 to 3.48; 4 studies, 613 participants/procedures), and more frequent adverse events: hyperpigmentation (risk ratio (RR) 11.88, 95% CI 4.54 to 31.09; 3 studies, 528 participants/procedures); matting (RR 4.06, 95% CI 1.28 to 12.84; 3 studies, 528 participants/procedures). There may be more pain experienced in the sclerosing-agents group compared to placebo (SMD 0.70, 95% CI 0.06 to 1.34; 1 study, 40 participants; low-certainty evidence). Polidocanol versus any sclerosing agent There was no clear difference in resolution or improvement (or both) of telangiectasias (SMD 0.01, 95% CI -0.13 to 0.14; 7 studies, 852 participants/procedures), hyperpigmentation (RR 0.94, 95% CI 0.62 to 1.43; 6 studies, 819 participants/procedures), or matting (RR 0.82, 95% CI 0.52 to 1.27; 7 studies, 859 participants/procedures), but there were fewer cases of pain (SMD -0.26, 95% CI -0.44 to -0.08; 5 studies, 480 participants/procedures) in the polidocanol group. All moderate-certainty evidence. Sodium tetradecyl sulphate (STS) versus any sclerosing agent There was no clear difference in resolution or improvement (or both) of telangiectasias (SMD -0.07, 95% CI -0.25 to 0.11; 4 studies, 473 participants/procedures). There was more hyperpigmentation (RR 1.71, 95% CI 1.10 to 2.64; 4 studies, 478 participants/procedures), matting (RR 2.10, 95% CI 1.14 to 3.85; 2 studies, 323 participants/procedures) and probably more pain (RR 1.49, 95% CI 0.99 to 2.25; 4 studies, 409 participants/procedures). All moderate-certainty evidence. Foam versus any sclerosing agent There was no clear difference in resolution or improvement (or both) of telangiectasias (SMD 0.04, 95% CI -0.26 to 0.34; 2 studies, 187 participants/procedures); hyperpigmentation (RR 2.12, 95% CI 0.44 to 10.23; 2 studies, 187 participants/procedures) or pain (SMD -0.10, 95% CI -0.44 to 0.24; 1 study, 147 participants/procedures). There may be more matting using foam (RR 6.12, 95% CI 1.04 to 35.98; 2 studies, 187 participants/procedures). All low-certainty evidence. Laser versus any sclerosing agent There was no clear difference in resolution or improvement (or both) of telangiectasias (SMD -0.09, 95% CI -0.25 to 0.07; 5 studies, 593 participants/procedures), or matting (RR 1.00, 95% CI 0.46 to 2.19; 2 studies, 162 participants/procedures), and maybe less hyperpigmentation (RR 0.57, 95% CI 0.40 to 0.80; 4 studies, 262 participants/procedures) in the laser group. All moderate-certainty evidence. High heterogeneity of the studies reporting on pain prevented pooling, and results were inconsistent (low-certainty evidence). Laser plus sclerotherapy (polidocanol) versus sclerotherapy (polidocanol) Low-certainty evidence suggests there may be more resolution or improvement (or both) of telangiectasias in the combined group (SMD 5.68, 95% CI 5.14 to 6.23; 2 studies, 710 participants), and no clear difference in hyperpigmentation (RR 0.83, 95% CI 0.35 to 1.99; 2 studies, 656 participants) or matting (RR 0.83, 95% CI 0.21 to 3.28; 2 studies, 656 participants). There may be more pain in the combined group (RR 2.44, 95% CI 1.69 to 3.55; 1 study, 596 participants; low-certainty evidence). AUTHORS' CONCLUSIONS: Small numbers of studies and participants in each comparison limited our confidence in the evidence. Sclerosing agents were more effective than placebo for resolution or improvement of telangiectasias but also caused more adverse events (moderate-certainty evidence), and may result in more pain (low-certainty evidence). There was no evidence of a benefit in resolution or improvement for any sclerosant compared to another or to laser. There may be more resolution or improvement of telangiectasias in the combined laser and polidocanol group compared to polidocanol alone (low-certainty evidence). There may be differences between treatments in adverse events and pain. Compared to other sclerosing agents polidocanol probably causes less pain; STS resulted in more hyperpigmentation, matting and probably pain; foam may cause more matting (low-certainty evidence); laser treatment may result in less hyperpigmentation (moderate-certainty evidence). Further well-designed studies are required to provide evidence for other available treatments and important outcomes (such as recurrence, time to resolution and delayed adverse events); and to improve our confidence in the identified comparisons.


Assuntos
Telangiectasia , Veias , Feminino , Humanos , Prurido/tratamento farmacológico , Escleroterapia , Telangiectasia/terapia
5.
Wiad Lek ; 74(8): 1960-1963, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34537750

RESUMO

OBJECTIVE: The aim of the research is to determine "to and fro" venous flap blood circulation perfusion ability and flap size survival. PATIENTS AND METHODS: Materials and methods: "To and fro" blood circulation mathematical model based on the theory of compressed liquid flow thought the porous medium. RESULTS: Result: Designed mathematical model allows to calculate the viable flap size that depends on pedicle vessel radius, the blood pressure gradient, the blood viscosity, the elastic tissue capacity, the pulse frequency, vessels flap topography and surgical pedicle flap technique. Viable flap width may extent up to 4-6 cm. CONCLUSION: Conclusions: Only thin skin or fascial flaps, were through venous pedicle with a lot of side branches located under the flap surface and along central flap axis may survive with "to and fro" blood circulation.


Assuntos
Retalhos Cirúrgicos , Veias , Humanos , Modelos Teóricos , Veias/cirurgia
6.
Angiol Sosud Khir ; 27(3): 54-65, 2021.
Artigo em Inglês, Russo | MEDLINE | ID: mdl-34528589

RESUMO

Described in the article is a clinical case report regarding complete endovascular arterialization of deep crural and pedal veins in a male patient with accompanying pathology and impossibility of intraluminal restoration of the arterial bed. Peculiarities of the presented case report consisted in creation of an arteriovenous anastomosis in the upper third of the crus using an endovascular technique. During treatment, a repeat intervention was required, i. e., balloon angioplasty of veins and implantation of an additional stent graft due to reocclusion of veins because of long-term local treatment of wounds and cytostatic therapy for background diseases (chronic myeloleukaemia and rheumatoid arthritis). The performed treatment resulted in a clear trend towards healing of the wounds on the foot and limb salvage.


Assuntos
Procedimentos Endovasculares , Isquemia , Amputação , , Humanos , Isquemia/diagnóstico , Isquemia/etiologia , Isquemia/cirurgia , Perna (Membro) , Salvamento de Membro , Masculino , Resultado do Tratamento , Veias/cirurgia
7.
Angiol Sosud Khir ; 27(3): 68-76, 2021.
Artigo em Russo | MEDLINE | ID: mdl-34528590

RESUMO

AIM: The study was aimed at assessing the incidence of arteriovenous compression in women with chronic venous insufficiency of the inferior vena cava and at developing an optimal diagnostic algorithm. PATIENTS AND METHODS: During the period 2019-2020, we performed a cross-sectional study including a total of sixty-six 18-to-55-year-old (mean 33.5±5.0) women with clinical manifestations of chronic venous insufficiency of the basin of the inferior vena cava. A diagnostic algorithm included questionnaire, transvaginal ultrasound examination, multislice computed tomography, direct phlebography in combination with phlebotonometry. RESULTS: Chronic venous insufficiency of lower limbs was diagnosed in 66 (100%) cases and was presented by the following clinical classes according to the CEAP classification: C0 - 4.5%, C1 - 60.6%, C2 - 27.2%, C3 - 3%. Symptoms of pelvic venous plethora were revealed in 36 (55.5%) examined patients. Arteriovenous compression syndrome according to the findings of multislice computed tomography was verified in 16 (24%) women, including May-Turner syndrome in 5 (7.6%), aortomesenteric compression syndrome in 8 (12%) women, with a combination of both syndromes observed in 3 cases; the frequency of their detection did not differ statistically in subgroups of women with and without clinical signs pelvic varicose veins. Direct phlebography in combination with phlebotonometry was performed in 9 women, the diagnosis of arteriovenous compression (May-Thurner syndrome) was confirmed in 1 case only. CONCLUSION: In women with signs of chronic venous insufficiency in the system of the inferior vena cava the frequency of detecting arteriovenous compression on multislice computed tomography may reach 24% and does not depend on the presence of symptoms of pelvic venous plethora. The proportion of arteriovenous compression according to the findings of direct phlebography and phlebotonometry in the structure of causes of the development of pelvic varicose veins did not exceed 11%. An algorithm for diagnosing arteriovenous compression syndromes should obligatorily include multislice computed tomography, direct phlebography and phlebotonometry.


Assuntos
Varizes , Insuficiência Venosa , Estudos Transversais , Feminino , Humanos , Flebografia , Varizes/complicações , Varizes/diagnóstico , Veias , Insuficiência Venosa/diagnóstico por imagem , Insuficiência Venosa/etiologia
8.
Angiol Sosud Khir ; 27(3): 77-83, 2021.
Artigo em Russo | MEDLINE | ID: mdl-34528591

RESUMO

AIM: The study was aimed at assessing efficacy and safety of micronized purified flavonoid fraction (MPFF, Detralex) in comprehensive treatment of chronic venous oedema induced by lower limb varicose veins. PATIENTS AND METHODS: We performed a post hoc analysis of the results of treatment of 708 patients included into the observational programme VAP-PRO-C3 (ClinicalTrials.gov. NCT03722836). These patients, depending on the type of treatment, were divided into 8 subgroups: MPFF (n=32); MPFF + compression (n=145); MPFF + compression + topical treatment (n=158); MPFF + compression + topical treatment + endovasal laser coagulation (n=197); MPFF + endovasal laser coagulation (n=3); MPFF + compression + endovasal laser coagulation (n=152), patients not receiving MPFF (n=16); MPFF + topical treatment (n=2). Due to paucity of the participants, from the subsequent analysis we excluded the groups MPFF + endovasal laser coagulation, patients not receiving MPFF (n=16) and MPFF + topical treatment. All further statistical data are shown for the remaining 687 patients. RESULTS: Comparing the groups of patients undergoing conservative treatment alone and those subjected to surgical intervention demonstrated no statistically significant differences in dynamics of crural oedema. In both groups at every subsequent visit there was a statistically significant decrease in the ankle volume (p<0.001). During the whole period of follow up the crural volume in patients from the group of conservative treatment totally decreased by 0.201±0.158 L and in the operated patients by 0.236±0.189 L (p=0.021). The QOL assessed by the CIVIQ-14 global index score statistically significantly improved in the unoperated patients from 31.5±19.2 to 12.0±10.1 (p<0.001). In the operated patients, the baseline and final values of the QOL of the global index score amounted to 33.4±17.8 and 7.7±9.2, respectively (p<0.001). In the groups with and without topical treatment, the baseline values of the QOL assessed by CIVIQ-14 global index score amounted to 28.5±17.4 and 36.2±18.6, respectively. During the follow-up period, we observed statistically significant positive dynamics of all parameters of quality of life. The final visit demonstrated improvement of the CIVIQ-14 global index score to 9.4±9.2 in patients without topical treatment and 10.1±10.4 in those receiving topical treatment (p=0.367), with the mean value of this parameter during treatment in both groups decreased significantly (p<0.001). A statistically significant decrease in the ankle volume in both groups was registered at every visit, finally amounting to 0.223±0.166 L and 0.248±0.174 L (p=0.118) for patients not receiving and receiving topical treatment, respectively. In groups of patients not receiving and those receiving compression therapy, the baseline values of the QOL assessed by CIVIQ-14 global index score amounted to 21.4±14.2 and 33.1±18.5 (p<0.001), respectively. At the final visit, these indices statistically significantly (p<0.001) decreased to 7.3±9.1 and 9.9±9.9 (p=0.106). Compared with the baseline values, the ankle volume at the final visit in groups of patients with and without compression therapy statistically significantly decreased by 0.187±0.14 L and 0.238±0.17 L respectively (p=0.204). During the study, there were no adverse events related to the administration of MPFF and use of Detragel. CONCLUSION: MPFF and Detragel appear to be effective and safe components of comprehensive conservative therapy of chronic oedema induced by primary varicose veins of lower extremities.


Assuntos
Varizes , Insuficiência Venosa , Doença Crônica , Edema/diagnóstico , Edema/etiologia , Edema/terapia , Humanos , Qualidade de Vida , Resultado do Tratamento , Varizes/complicações , Varizes/diagnóstico , Varizes/terapia , Veias , Insuficiência Venosa/complicações , Insuficiência Venosa/diagnóstico , Insuficiência Venosa/terapia
9.
JNMA J Nepal Med Assoc ; 59(238): 547-549, 2021 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-34508407

RESUMO

INTRODUCTION: Superficial veins in cubital fossa vary frequently in their anatomical pattern. The knowledge of variation of the cubital venous pattern is very essential for medical professionals for venous access during different medical procedures. This study aims to find the prevalence of Type A cubital venous pattern among students of a dental college. METHODS: This descriptive cross-sectional study was conducted among 133 dental students of age 18 to 25 years in the department of anatomy of a dental college from November 2020 to February 2021. This study was conducted after obtaining ethical clearance from the Institutional Review Committee. Convenience sampling used and data was analyzed using Statistical Package for Social Sciences version 20. Point estimate at 95% Confidence Interval was calculated along with frequency and proportion for binary data. RESULTS: Out of 133 dental students, Type A cubital venous pattern was found in 96 (72.18%) (64.56-79.79 at 95% Confidence Interval). Type A cubital venous pattern was seen in the left arm in 116 (43.61%) and in the right arm of 76 (28.57%) students. This pattern was noticed in 30 (22.55%) male and 103 (77.44%) female students respectively. CONCLUSIONS: This study showed higher Type A cubital venous pattern among dental students than other international studies.


Assuntos
Estudantes de Medicina , Veias , Adolescente , Adulto , Estudos Transversais , Feminino , Antebraço , Humanos , Masculino , Universidades , Adulto Jovem
10.
Medicina (Kaunas) ; 57(9)2021 Sep 18.
Artigo em Inglês | MEDLINE | ID: mdl-34577908

RESUMO

Background and Objectives: Launay's external carotid vein (ECV) is poorly represented in the anatomical literature, although it is an occasional satellite of the external carotid artery (ECA). We aimed to establish the incidence and morphology of the ECV. Materials and Methods: One hundred computed tomography angiograms were investigated, and ECVs were documented anatomically, when found. Results: Launay's vein was found in 3/200 sides (1.5%) in a male and two female cases. In two of these cases, the ECV was a replaced variant of the anterior division of the retromandibular vein (RMV), and the facial vein (FV) ended in the external jugular vein. In the third case with the ECV, the RMV was absent and the common FV that resulted from that ECV and the FV drained into the internal jugular vein. The ECV could also appear as an accessory RMV, not just as a replaced one. Additional variants were found, such as fenestration of the external jugular vein (EJV), the extracondylar vein draining the deep temporal veins and an arterial occipitoauricular trunk. Conclusions: Surgical dissections of the ECA in the retromandibular space should carefully observe an ECV to avoid unwanted haemorrhagic events. Approaches of the neck of the mandible should also carefully distinguish the consistent extracondylar veins.


Assuntos
Veias Jugulares , Veias , Angiografia , Drenagem , Feminino , Humanos , Veias Jugulares/diagnóstico por imagem , Masculino , Mandíbula
11.
Yonsei Med J ; 62(10): 928-935, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-34558872

RESUMO

PURPOSE: In young patients with varicocele, preservation of the internal spermatic artery may be advantageous for catch-up growth, but it may also increase the likelihood of treatment failure. Intraoperative venography reduces the likelihood that unsealed veins will remain after varicocelectomy. We analyzed the characteristics of remnant veins visualized through intraoperative venography to investigate the cause of surgical failure in artery-sparing varicocelectomy (ASV). MATERIALS AND METHODS: We retrospectively analyzed clinical characteristics and outcomes of patients aged 18 years or younger who underwent varicocelectomy with intraoperative venography from January 2005 to December 2017. During varicocelectomy, intraoperative venography was performed to distinguish veins from other structures. Any unsealed veins that were discovered were ligated and classified using the Bahren system. RESULTS: One hundred and sixty-two patients underwent intraoperative venography: 153 cases (94.4%) were for primary varicocelectomy, and 9 cases (5.6%) were for repeat varicocelectomy. Open varicocelectomy was performed in 105 cases (64.8%), and laparoscopic varicocelectomy was performed in 57 cases (35.2%). Venography revealed remnant veins after the first ligation in 51 cases (31.2%), 46 (90.2%) and 5 (9.8%) of which were Bähren types 3 and 4, respectively. Five patients (3.1%) experienced varicocele recurrence, classified as persistence in 1 patient (0.6%) and relapse in 4 patients (2.5%). CONCLUSION: Remnant collateral veins of the internal spermatic vein (ISV) (Bahren type 3) are the most common cause of failure in ASV. In a few patients, an external spermatic vein merges with the ISV at a higher level (Bahren type 4) and is unidentifiable without venography.


Assuntos
Cordão Espermático , Varicocele , Humanos , Masculino , Flebografia , Estudos Retrospectivos , Cordão Espermático/diagnóstico por imagem , Cordão Espermático/cirurgia , Testículo , Varicocele/diagnóstico por imagem , Varicocele/cirurgia , Veias/diagnóstico por imagem , Veias/cirurgia
12.
Ultrasound Q ; 37(3): 219-228, 2021 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-34478419

RESUMO

ABSTRACT: Pelvic venous disorders are a group of interrelated conditions characterized by venous incompetence. These conditions often manifest with nonspecific symptoms that overlap with many gynecological, gastrointestinal, and urologic diseases. Clinical diagnosis can be difficult, and imaging can play a vital role in differentiating etiology. Sonographic evaluation is often the first step in evaluating these symptoms. Special attention to possible underlying pelvic venous disorders can reveal characteristic findings, support diagnosis, and guide treatment. Here we review pelvic congestion syndrome, nutcracker syndrome, May-Thurner syndrome, and other venous disorders, with a specific focus on sonographic findings and considerations.


Assuntos
Pelve , Doenças Vasculares , Humanos , Dor Pélvica , Pelve/diagnóstico por imagem , Ultrassonografia , Veias
13.
J Biomed Opt ; 26(9)2021 09.
Artigo em Inglês | MEDLINE | ID: mdl-34541836

RESUMO

SIGNIFICANCE: Effective vein visualization is critically important for several clinical procedures, such as venous blood sampling and intravenous injection. Existing technologies using infrared device or ultrasound rely on professional equipment and are not suitable for daily medical care. A regression-based vein visualization method is proposed. AIM: We visualize veins from conventional RGB images to provide assistance in venipuncture procedures as well as clinical diagnosis of some venous insufficiency. APPROACH: The RGB images taken by digital cameras are first transformed to spectral reflectance images using Wiener estimation. Multiple regression analysis is then applied to derive the relationship between spectral reflectance and the concentrations of pigments. Monte Carlo simulation is adopted to get prior information. Finally, vein patterns are visualized from the spatial distribution of pigments. To minimize the effect of illumination on skin color, light correction and shading removal operations are performed in advance. RESULTS: Experimental results from inner forearms of 60 subjects show the effectiveness of the regression-based method. Subjective and objective evaluations demonstrate that the clarity and completeness of vein patterns can be improved by light correction and shading removal. CONCLUSIONS: Vein patterns can be successfully visualized from RGB images without any professional equipment. The proposed method can assist in venipuncture procedures. It also shows promising potential to be used in clinical diagnosis and treatment of some venous insufficiency.


Assuntos
Iluminação , Veias , Antebraço , Humanos , Pigmentação da Pele , Ultrassonografia , Veias/diagnóstico por imagem
14.
Int J Mol Sci ; 22(16)2021 Aug 21.
Artigo em Inglês | MEDLINE | ID: mdl-34445743

RESUMO

Arteriovenous malformations are a vascular anomaly typically present at birth, characterized by an abnormal connection between an artery and a vein (bypassing the capillaries). These high flow lesions can vary in size and location. Therapeutic approaches are limited, and AVMs can cause significant morbidity and mortality. Here, we describe our current understanding of the pathogenesis of arteriovenous malformations based on preclinical and clinical findings. We discuss past and present accomplishments and challenges in the field and identify research gaps that need to be filled for the successful development of therapeutic strategies in the future.


Assuntos
Malformações Arteriovenosas/genética , Animais , Artérias/patologia , Malformações Arteriovenosas/diagnóstico por imagem , Malformações Arteriovenosas/patologia , Malformações Arteriovenosas/terapia , Modelos Animais de Doenças , Humanos , Terapia de Alvo Molecular , Receptor Cross-Talk , Veias/patologia
16.
Crit Care ; 25(1): 318, 2021 08 31.
Artigo em Inglês | MEDLINE | ID: mdl-34461974

RESUMO

This article is one of ten reviews selected from the Annual Update in Intensive Care and Emergency Medicine 2021. Other selected articles can be found online at https://www.biomedcentral.com/collections/annualupdate2021 . Further information about the Annual Update in Intensive Care and Emergency Medicine is available from https://link.springer.com/bookseries/8901 .


Assuntos
Artérias/fisiopatologia , Dióxido de Carbono/análise , Veias/fisiopatologia , Humanos , Monitorização Fisiológica/instrumentação , Monitorização Fisiológica/métodos , Prognóstico
19.
Dermatol Ther ; 34(5): e15074, 2021 09.
Artigo em Inglês | MEDLINE | ID: mdl-34338412

RESUMO

Vascular malformations (VM) are congenital, benign, and relatively frequent lesions. Scant data have been published about the epidemiology, clinical presentation, and treatment of VM from a dermatologist's perspective. The substantial differences between subtypes, broad range of specialists consulted and confusing nomenclature used over previous years may hamper a correct diagnosis. The main objective of this study is to describe VM epidemiology. As a secondary endpoint we evaluate clinical characteristics, clinical-radiological correlation and treatment approaches. We carried out an observational, descriptive, retrospective study. Cases presented to the multidisciplinary committee of our hospital from 2009 to 2019 were retrieved. Electronic medical records, monthly committee reports and the iconographic archive were reviewed and statistically analyzed. Overall, venous malformations (VeM) are the most frequent VM, followed by capillary malformations (CM), arterioVeM and lymphatic malformations (LM). Considering only patients under 16, CMs are the most frequent ones. Capillary and LMs are larger than venous or arteriovenous. While CMs are usually asymptomatic, symptomatic cases are threefold more frequent in the other subtypes. Decisions on active or conservative management depend on VM size but not location or patient age. CMs are mainly treated with laser therapy; venous with sclerotherapy or surgery; arteriovenous with surgery and lymphatic with surgery or sirolimus. Dermatologists play an important role in VM diagnosis and management. Our 10-year multidisciplinary experience should contribute to the literature and represent a practical resource for clinicians and researchers.


Assuntos
Anormalidades Linfáticas , Malformações Vasculares , Humanos , Estudos Retrospectivos , Escleroterapia/efeitos adversos , Malformações Vasculares/diagnóstico , Malformações Vasculares/epidemiologia , Malformações Vasculares/terapia , Veias
20.
Clin Anat ; 34(8): 1208-1214, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-34448241

RESUMO

Recipient vessel selection for free flap reconstruction depends on numerous factors and may be limited due to previous treatment. Currently, little evidence is available regarding the anatomy and reconstructive potential of the common facial vein (CFV), a tributary of the internal jugular vein (IJV). The aim of this project was to determine the diameter of the CFV at various points along its course and identify suitable landmarks to locate the CFV, to consider the vessel as a potential recipient vein in free flap reconstruction. A cadaveric study was conducted by dissecting 17 embalmed neck hemi-sections in the Keele University Medical School Anatomy Suite. Our intent was to describe the gross anatomy of the CFV in terms of diameter and relation to surrounding structures. We found the mean diameter of the CFV to be 5.9 (± 1.8) mm at its termination into the IJV. We also found the mean distance of the CFV termination into the IJV from the level of the hyoid bone was 8.0 (± 4.0) mm. The diameter of the CFV could accommodate for end-to-end anastomoses to be formed with the IJV system. The diameter also suggests the vein to be appropriate for microvascular anastomosis with commonly used free flaps. The results propose that the CFV can be found within 12 mm of the level of the hyoid bone, knowledge of which could reduce operative time and site morbidity. These findings support the CFV as a potential recipient vein in free flap reconstruction of the head and neck.


Assuntos
Face/irrigação sanguínea , Retalhos de Tecido Biológico/irrigação sanguínea , Veias/anatomia & histologia , Idoso , Idoso de 80 Anos ou mais , Anastomose Cirúrgica/métodos , Cadáver , Feminino , Humanos , Masculino
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