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1.
Skin Res Technol ; 29(3): e13218, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-36973986

RESUMO

BACKGROUND: Skin measurements of transepidermal water loss (TEWL) and stratum corneum hydration (SCH) reflect different aspects of skin physiology. Since epidermal water loss depends on epidermal-to-air water vapor gradients, a possible quantitative relationship between TEWL and SCH may exist. This investigation's purpose was to test the possible TEWL-SCH relationship. MATERIALS AND METHODS: SCH and TEWL were measured noninvasively on forearm and palmer thenar eminence (hand) in 40 young adults (20 males) along with total body fat percentage (FAT) via bioimpedance. RESULTS: A significant positive nonlinear correlation (p < 0.001) was detected between SCH and TEWL in hands of the male cohort that occurred when SCH exceeded a threshold level. This threshold level was not exceeded in male or female forearms and forearms did not display a SCH-TEWL correlation. There was a weak inverse dependence of TEWL on FAT on both forearm and hand (p < 0.05), but no SCH-FAT relationship was observed. TEWL values on the forearm and hand were moderately correlated with each other (p = 0.002) but SCH values were not. CONCLUSION: The findings clarify the relationship between forearm and palmer hydration and TEWL values, and their relationship to total body fat percentages in young healthy adults. The significant correlation between palmer stratum corneum hydration and palmer TEWL that was discovered in the male but not the female cohort suggests a threshold hydration level for which TEWL depends both on skin barrier function and stratum corneum hydration. This implies that conditions with increased SCH may in part account for elevated TEWL values.


Assuntos
Epiderme , Antebraço , Mãos , Perda Insensível de Água , Feminino , Humanos , Masculino , Adulto Jovem , Epiderme/química , Epiderme/metabolismo , Epiderme/fisiologia , Antebraço/fisiologia , Mãos/fisiologia , Pele/química , Pele/metabolismo , Fenômenos Fisiológicos da Pele , Perda Insensível de Água/fisiologia , Vapor/análise , Estado de Hidratação do Organismo
2.
Electromagn Biol Med ; 40(1): 1-10, 2021 Jan 02.
Artigo em Inglês | MEDLINE | ID: mdl-33283550

RESUMO

This pilot study's goal was to investigate the impacts of static magnetic fields (SMF) on finger skin blood perfusion (SBP) when exposing the ulnar artery and ulnar and medial nerves to a rare earth concentric magnet for 30 minutes. Control SBP was measured in 4th fingers of adults (n = 12, age 26.0 ± 1.4 years) for 15 minutes using laser-Doppler. Then, active-magnets were placed over one arm's ulnar and median nerves at the wrist and sham-magnets placed at corresponding sites on the other arm. Devices were randomly assigned and placed by an investigator "blinded" to device type. The maximum SMF perpendicular to skin was 0.28 T measured 2 mm from magnet surface. The tangential field at this distance was 0.20 T. SBP was analyzed and tested for differential effects attributable to magnets compared to shams in each of the 5-minute intervals over the full 45-minute experiment. Results showed no statistically significant difference between SBP measured on the magnet-treated side compared to the sham side. Magnet and sham side SBP values (mean ± SEM, arbitrary units) prior to device placement were 0.568 ± 0.128 vs. 0.644 ± 0.115, p = .859 and during device placement were 0.627 ± 0.135 vs. 0.645 ± 0.117, p = .857. In conclusion, these findings have failed to uncover any significant effects of the static magnetic field on skin blood perfusion in the young healthy adult population evaluated. Its potential for altering SBP in more mature persons or those with underlying conditions affecting blood flow has not been evaluated but represents the next target of research inquiry. ClinicalTrials.gov registration number is NCT04539704.


Assuntos
Dedos/irrigação sanguínea , Campos Magnéticos , Fluxo Sanguíneo Regional , Pele/irrigação sanguínea , Adulto , Feminino , Humanos , Masculino , Projetos Piloto , Adulto Jovem
3.
Skin Res Technol ; 26(2): 226-233, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-31556162

RESUMO

BACKGROUND: Skin tissue dielectric constant (TDC) measurements at a frequency of 300 MHz are used to assess skin properties in many conditions. Impacts of patient obesity on these values are unknown, and its quantitative assessment was the goal of this research. MATERIALS AND METHODS: Women in a weight loss program (N = 32) had TDC measured on forearm, biceps, neck, jowl, and submental regions along with measurements of total body fat (TBF), water (TBW), intracellular water (ICW), and extracellular water (ECW) via multi-frequency bioimpedance. Group age (mean ± SD) was 40.0 ± 11.6 years (20-70 years) with body mass index (BMI) of 31.8 ± 6.7 Kg/m2 (23.0-49.9 Kg/m2 ). For analysis, subjects were divided into those with BMI < 30 Kg/m2 (subgroup A, n = 16) vs ≥30 Kg/m2 (subgroup B, n = 16). RESULTS: Tissue dielectric constant at forearm and biceps decreased significantly (P < .001) with increasing depth from 0.5 to 1.5 to 2.5 mm but TDC values and their inter-side ratios did not differ between subgroups A and B at any measured site. Although correlations between TBW, ECW, and ICW were significant (P < .001), there was no dependence of TDC values on any of these parameters. CONCLUSIONS: Previously unknown TDC values for obese persons are provided and based on subgroup analyses suggest that skin TDC values in overweight and obese persons are not confounded by variables such as TBW and TBF. Further, since inter-side ratios and their SD's yielded thresholds for forearm and biceps similar to those established for women with normal BMI, use of these clinical inter-arm TDC ratios now is extended to include a wider BMI range.


Assuntos
Tecido Adiposo/fisiologia , Impedância Elétrica , Fenômenos Fisiológicos da Pele , Pele/química , Adulto , Idoso , Água Corporal/fisiologia , Feminino , Humanos , Pessoa de Meia-Idade , Adulto Jovem
4.
J Wound Ostomy Continence Nurs ; 45(1): 17-21, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29300285

RESUMO

PURPOSE: The purpose of this study was to test the hypothesis that temperature differentials measured by thermal imaging of sacral versus a remote skin area in critically ill patients differentiate those with significant vascular disease and risk for pressure injury of the sacral area. DESIGN: Prospective cohort study. SUBJECTS AND SETTING: The sample comprised 100 patients (58 men, 42 women) with mean ± SD ages of 70.4 ± 14.4 and 74.0 ± 14.5 years, respectively, who were admitted to a cardiovascular intermediate care unit or a neurosurgical intensive care unit in the southeastern region of the United States. METHODS: A commercially available thermal imaging system was used to obtain simultaneous standard photographic and infrared thermal images (11 × 14 inches) that included the patient's buttocks and a remote skin area after the patient was off-loaded for about 4 minutes. Images were processed to determine temperature differences between the sacral region (deemed to have an elevated risk for pressure injury) and a remote region of the skin located at least 10-cm proximal to the sacrum, with an average sacrum-to-remote distance of 17.9 ± 3.0 cm that was deemed to be at minimal risk. Prior measurements of healthy subjects showed that sacral skin was on average 0.75°C less than the remote skin site (ΔT =-0.75°C). For the present analysis, a threshold ΔTTH of twice that amount (ΔT =-1.5°C) or more was considered to put a patient at greater than normal risk based on the hypothesis that low sacral temperatures were associated with lowered blood perfusion issues of various clinical conditions. The vascular status of patients who equaled or exceeded this threshold was compared to the other patients. RESULTS: Thirty-two patients exceeded ΔTTH, with an average ΔT of -1.92°C ± 0.62°C. In 6 patients, ΔT was greater than +1.5°C, with average of +1.98°C ± 0.49°C. The remaining 63 patients had an average ΔT of 0.13°C ± 0.58°C. Chi-square analysis of the proportions of patients exceeding or not exceeding thresholds in relation to their known vascular disease status revealed no significant difference between these subgroups. CONCLUSIONS: Although infrared thermal screening may provide visually impressive and potentially useful images in some cases, the use of temperature differentials to detect patients at particularly high risk for pressure injury owing to local blood flow is not supported by results of this study.


Assuntos
Raios Infravermelhos/uso terapêutico , Região Sacrococcígea/fisiopatologia , Temperatura Cutânea/fisiologia , Pele/irrigação sanguínea , Idoso , Idoso de 80 Anos ou mais , Distribuição de Qui-Quadrado , Estudos de Coortes , Feminino , Humanos , Escala de Gravidade do Ferimento , Unidades de Terapia Intensiva/organização & administração , Masculino , Pessoa de Meia-Idade , Pressão/efeitos adversos , Úlcera por Pressão/diagnóstico , Úlcera por Pressão/fisiopatologia , Úlcera por Pressão/prevenção & controle , Estudos Prospectivos , Região Sacrococcígea/anormalidades , Pele/fisiopatologia
5.
Skin Res Technol ; 23(1): 112-120, 2017 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-27435889

RESUMO

PURPOSE: Our goal was to test the hypothesis that skin firmness correlates with skin hydration. METHODS: Dermal water was assessed by tissue dielectric constant (TDC) at 0.5 mm (TDC0.5 ) and 2.5 mm (TDC2.5 ) depths on four face sites and two arm sites of 35 women (25.0 ± 1.6 years). Firmness was determined by force (mN) to indent skin to 0.3 mm (F0.3 ) and 1.3 mm (F1.3 ). RESULTS: F0.3 was similar among face sites (avg = 16.2 ± 7.2 mN) but F1.3 varied (avg = 32.5 ± 4.1 mN). TDC2.5 was similar among face sites (avg = 37.7 ± 4.2) but TDC0.5 varied (avg = 36.2 ± 4.8). F1.3 of arm sites was similar (avg = 60.2 ± 18.6 mN) and both greater than F1.3 of neck (28.3 ± 7.1 mN) and face. Regression analysis showed a near-zero correlation between forces and TDC at all sites. CONCLUSION: The near-zero correlation may be due to low skin interstitial hydraulic resistance to mobile water movement in healthy young skin. If true, then conditions in which dermal hydraulic conductance is reduced as in lymphedematous, diabetic, or aged skin are more likely show the hypothesized relationship. Our findings provide normalized reference values and suggest that such persons are an important population to study to test for a possible skin water-indentation force relationship and its utilization for early diagnosis.


Assuntos
Água Corporal/metabolismo , Módulo de Elasticidade/fisiologia , Impedância Elétrica , Resposta Galvânica da Pele/fisiologia , Testes de Dureza/métodos , Dureza/fisiologia , Adolescente , Adulto , Braço/fisiologia , Face/fisiologia , Feminino , Humanos , Ciclo Menstrual/fisiologia , Pescoço/fisiologia , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Fenômenos Fisiológicos da Pele , Adulto Jovem
6.
Ann Surg Oncol ; 22(5): 1483-9, 2015 May.
Artigo em Inglês | MEDLINE | ID: mdl-25388057

RESUMO

BACKGROUND: Skin-to-fat tissue dielectric constant (TDC) values at 300 MHz largely depend on tissue water and provide a rapid way to assess skin water by touching skin with a probe for approximately 10 s. This method has been used to investigate lymphedema features accompanying breast cancer (BC), but relationships between TDC and nodes removed or symptoms is unclear. Our goals were: (1) to compare TDC values in BC patients prior to surgery (group A) and in patients who had BC-related surgery (group B) to determine if TDC of group B were related to nodes removed and reported symptoms and (2) to develop tentative lymphedema-detection thresholds. METHODS: Arm volumes and TDC values of at-risk and contralateral forearms and biceps were determined in 103 women awaiting surgery for BC and 104 women who had BC-related surgery 26.3 ± 17.5 months prior to evaluation. Inter-arm ratios (at-risk/contralateral) were determined and patients answered questions about lymphedema-related symptoms. RESULTS: Inter-arm TDC ratios for group A forearm and biceps were respectively 1.003 ± 0.096 and 1.012 ± 0.143. Group B forearm ratios were significantly greater, and among group B patients who reported at least one symptom there was a significant correlation between TDC ratios and symptom burden and nodes removed. CONCLUSIONS: Inter-arm TDC ratios are significantly related to symptoms and nodes removed. Ratios increase with increasing symptom score and might be used to detect pre-clinical unilateral lymphedema using TDC ratio thresholds of 1.30 for forearm and 1.45 for biceps. Threshold confirmation awaits targeted prospective studies but can serve as guideposts to provide quantitative and easily done tracking assessments during follow-up visits.


Assuntos
Tecido Adiposo/patologia , Água Corporal/metabolismo , Neoplasias da Mama/complicações , Antebraço/patologia , Linfedema/diagnóstico , Mastectomia/efeitos adversos , Complicações Pós-Operatórias , Pele/patologia , Neoplasias da Mama/patologia , Neoplasias da Mama/cirurgia , Condutividade Elétrica , Feminino , Seguimentos , Humanos , Linfedema/etiologia , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Prognóstico , Pele/metabolismo , Fatores de Tempo
7.
J Wound Ostomy Continence Nurs ; 42(5): 468-73, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26336043

RESUMO

PURPOSE: To characterize and compare interface pressure profiles of an adaptive compression therapy (ACT) device and a traditional 4-layer bandage (4LB) system. DESIGN: A prospective, randomized, open-label, 1-arm, active controlled study. SUBJECTS: The sample comprised 12 healthy volunteers. METHODS: Subjects wore both devices for 8 hours on 3 consecutive days. Treatments were randomized to left and right legs. One clinician performed all applications and was experienced in the clinical use of both devices. Pressures were measured in seated and standing positions at the lower, mid, and upper calf immediately post application and after 1, 4, and 8 hours. RESULTS: Pressures achieved with the ACT were closer to targeted 40/30/20 mmHg graduated pressure values and were significantly less than the 4LB for corresponding sites/postures (P < .001). In the seated position, initial interface pressures (mean ± SD) for the ACT were 36.9 ± 4.9, 30.5 ± 4.5, and 21.0 ± 3.6 mmHg. Corresponding interface pressures for the 4LB were 52.5 ± 8.4, 57.5 ± 10.3, and 53.5 ± 12.9 mmHg. In the standing position, initial interface pressures for the ACT were 40.7 ± 4.8, 35.6 ± 4.5, and 21.1 ± 4.6 compared to 54.6 ± 12.5, 64.4 ± 10.9, and 53.7 ± 14.3 for the 4LB. At 1, 4, and 8 hours after application, the 4LB showed a significant progressive decline in interface pressure in both seated and standing positions (P < .001). Conversely, the ACT did not decrease over time and there was a slight but significant increase for lower and mid-calf sites in the seated position (P < .001). CONCLUSIONS: The ACT device provided more consistent interface pressures than the 4LB and the pressures achieved were consistent with contemporary venous ulcer therapy standards.


Assuntos
Bandagens , Bandagens Compressivas , Adulto , Feminino , Humanos , Dispositivos de Compressão Pneumática Intermitente , Perna (Membro) , Masculino , Pressão , Estudos Prospectivos , Úlcera Varicosa/terapia
8.
J Spinal Cord Med ; 37(6): 719-28, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-25398030

RESUMO

OBJECTIVE: Characterization of a non-invasive method of quantifying subepidermal moisture (SEM) surrounding stages III and IV pressure ulcers (PrUs) in spinal cord injury (SCI). DESIGN: Prospective, single-visit, single-rater, observational study, using repeated-measures analysis. Method Setting-inpatient units of one VA SCI Center. PARTICIPANTS: Convenience sample of 16 subjects with SCI with stage III or IV PrUs over sacrum or ischium. Interventions Measurement with the MoistureMeter-D, a hand-held device using 300 MHz electromagnetic waves. Outcome measures Dielectric constant, a dimensionless number which increases with the moisture content. Each subject had a PrU site and a control site. Measurements were made at each site, on intact skin, at four points spaced angularly around the site, in triplicate. Results (1) Short-term, single-rater relative error was 2.5%. (2) Order effect: first readings were higher than second readings in 55 of 64 measurement sets. Order effect was significant for control sites (P < 0.0001) but not for PrU sites. (3) Angular effect: SEM varied by angle at the PrU sites (P < 0.01); 12 o'clock position the highest and 6 o'clock the lowest. (4) Ability to differentiate PrUs from intact skin: SEM at PrU sites was greater by 9.0% than control sites (P < 0.05). (5) Site effect: SEM was higher at sacral locations than ischial at control sites by 20% (P < 0.005). CONCLUSIONS: SEM differentiates PrUs from intact skin. Future study designs must take into account order, angular, and site effects on this measure. This information will inform designers of future studies of SEM in healing of PrUs.


Assuntos
Epiderme/fisiologia , Úlcera por Pressão/diagnóstico , Úlcera por Pressão/etiologia , Traumatismos da Medula Espinal/complicações , Adulto , Idoso , Diagnóstico Precoce , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Observação , Projetos Piloto , Estudos Prospectivos
9.
Cureus ; 16(4): e59261, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38813316

RESUMO

This review describes the use of tissue dielectric constant (TDC) measurements mainly in the assessment of breast cancer-related lymphedema (BCRL). PubMed, Web of Science, and EMBASE databases were initially searched using criteria that included the terms "dielectric" and "lymphedema." The initial search yielded a total of 131 titles. After removing studies not focused on upper extremity lymphedema, 56 articles remained. These articles, together with relevant articles from their bibliographies, formed the basis of the review. The findings show the potential utility and applications of TDC measurements to help detect and track BCRL, whether present in limbs, breasts, or trunks. It is reported as a non-invasive, simple-to-use method, with each measurement requiring less than 10 seconds, suggesting its practicality and useability as an in-office or in-clinic screening and tracking method. Although there are various ways to quantitatively evaluate lymphedema, most, if not all, are restricted to measurements on limbs. Thus, one significant advantage of the TDC approach is that almost any local region of interest can be effectively measured and tracked, which, for BCRL, could include specific regions of arms or hands, breasts, and truncal areas.

10.
Cureus ; 16(3): e55906, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38601427

RESUMO

Lower extremity swelling may be broadly characterized as due to edema, lymphedema, or lipedema. Differentiation between these three conditions is important for providing appropriate treatment. This review analyzes and compares different clinical diagnostic modalities for these conditions, with the aim of assisting in the process of choosing the most appropriate diagnostic modality by highlighting the advantages and limitations of each. Using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines for a systematic search of peer-reviewed literature, the following diagnostic methods for lower extremity swelling were investigated: (1) ultrasound (US), (2) lymphoscintigraphy (LSG), (3) computed tomography (CT), (4) bioimpedance spectroscopy (BIS), (5) tissue dielectric constant (TDC), and (6) magnetic resonance imaging (MRI), including magnetic resonance lymphangiography (MRL). The databases used in the search were PubMed, ProQuest, CINAHL Complete, Web of Science, Embase, and Biomedical Reference Collection. After retrieving 115 studies based on predetermined inclusion criteria, a total of 31 studies were critically evaluated. The main results indicate the following: duplex US is the modality of choice to initially identify lower extremity edema such as deep venous thrombosis (DVT) and venous reflux due to its high sensitivity and specificity. CT venography of the lower extremity appears to bethe preferred option for gynecologic cancer patients with lower extremity swelling post-treatment, as it measures subcutaneous tissue volumes to look for DVTs, lymphoceles, and cancer recurrence. TDC is a recommended modality for a variety of conditions, including edema and lymphedema, in part, due to its noninvasive localized assessment capabilities and ease of use. LSG emerges as an effective imaging modality for lymphedema characterization with minimal invasiveness and high sensitivity and specificity. BIS is widely used to identify and monitor lower extremity lymphedema but has been reported to have low sensitivity and lacks the ability to account for changes in tissue composition such as fibrosis. US and MRL are favored for lipedema diagnosis, with MRL providing comprehensive anatomical and functional insights, albeit with cost and accessibility limitations compared to US. While CT, MRI, US, and TDC are all useful for differentiating lymphedema from lipedema, MRI is the preferred modality due to its anatomical and functional diagnostic capabilities. However, US is a pragmatic alternative for use with obese patients or when MRI is not an option.

11.
Cureus ; 16(4): e58994, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38800251

RESUMO

This scoping review addresses the potential maternal health outcomes of abortion restrictions in the U.S. by studying and analyzing the reported effects of abortion bans or limitations globally. The goal was to examine the medical implications for pregnant women who are unable to abort fetuses that have severe medical anomalies due to imposed restrictions. EMBASE, Medline, and CINAHL databases were searched for studies published in English concerning the medical implications of abortion restrictions in any country prior to the overturn of Roe v. Wade in 2022. For the search criteria using Boolean operators, keywords included the terms "fetal anomaly," "abortion ban," and "implications." Inclusion criteria incorporated studies published between 1980 and 2021, and controlled experimental research studies aimed to evaluate interventions were excluded. This resulted in 469 records initially found. Duplicate records were removed, and two separate tier reviews were conducted. Eleven reviewers independently screened abstracts and titles of 332 records to ascertain eligibility. Eligibility included pregnant women diagnosed with fetal anomalies, women denied access to safe abortions, and the maternal and fetal medical impacts of this. Three reviewers in the second screening independently read 36 full articles to further assess eligibility, resulting in 14 articles in the final review. Findings from this study showed that abortion bans in countries around the world have led to health complications in women seeking illegal abortion services, a decline in maternal mental health, including stress and depression, various medical complications such as obstructed labor, and an increase in high-risk fetuses born with severe deficits. The findings of this review portend similar negative consequences to be experienced by women who are subject to stricter abortion laws in the U.S.

12.
Skin Res Technol ; 19(1): 47-54, 2013 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-23046199

RESUMO

BACKGROUND: Biophysical measures to assess that skin water includes stratum corneum hydration via capacitance (SC), dermal water via tissue dielectric constant (TDC), and transepidermal water loss (TEWL). Since skin differs among anatomical sites and tissue depth we sought to determine the site and depth variability of these measures and their relationships. METHODS: Measurements were done at 17 skin sites from forehead to foot in 32 supine healthy women. Measurements included SC at 1.25 MHz, TDC at 300 MHz to depths of 0.5, 1.5, and 2.5 mm and TEWL. RESULTS: Tissue dielectric constant decreased with increasing depth at forehead, forearm, and calf; increased with depth at palm, thenar eminence and great toe; and was independent of depth at cheek, hand dorsum, thumb pulp, and foot dorsum. SC correlated with TDC at most sites and depths. TEWL correlated with TDC at 2.5 mm only at calf sites and thenar eminence. CONCLUSIONS: Results establish parameter ranges for each measure, show that TDC values do not necessarily change with skin depth, and show a significant correlation between TDC and SC values at most sites. These correlations suggest that SC hydration but not TEWL is directly linked to dermal tissue water levels in normal skin.


Assuntos
Água Corporal/metabolismo , Fenômenos Fisiológicos da Pele , Pele/anatomia & histologia , Pele/metabolismo , Adulto , Idoso , Biofísica , Índice de Massa Corporal , Espectroscopia Dielétrica , Capacitância Elétrica , Feminino , Antebraço , Testa , Humanos , Perna (Membro) , Linfedema/metabolismo , Linfedema/patologia , Pessoa de Meia-Idade , Valores de Referência , Perda Insensível de Água/fisiologia , Adulto Jovem
13.
Cureus ; 15(9): e45637, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37868483

RESUMO

This review aims to critically examine and present evidence for and against potential linkages between geomagnetic activity and its effects on blood pressure (BP). Four databases were searched for peer-reviewed papers written in English: PubMed, Web of Science, EMBASE, and Biomedical Reference Collection. Retrieved titles were first screened for potential relevance followed by an abstract review for further clarifications if warranted. The preponderance of the reported evidence is consistent with the concept that space weather and related events that cause sufficiently large changes in the geomagnetic field (GMF) can impact BP. The associated BP change in most but not all cases is one in which both systolic blood pressure (SBP) and diastolic blood pressure increase, with SBP appearing to be more consistently involved. The magnitude of the reported BP increase ranges from about 3 to 8 mmHg depending on the intensity of the geomagnetic activity. The initiation of these BP changes has been variably reported to occur shortly before the GMF change or in synchrony with the abrupt change in the GMF. Such GMF-linked BP changes are not present in all persons and there appears to be increased sensitivity in women and in persons with co-existing hypertension. The utility of these findings in assessing or treating persons with known or suspected hypertension remains to be determined via future research. Further, research directed at determining the factors that determine responders from non-responders to GMF changes is warranted.

14.
Cureus ; 15(12): e50531, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-38222165

RESUMO

Tissue dielectric constant (TDC) values assess certain skin properties that are dependent on multiple factors but mainly on the relative amount of water content within a locally measured tissue volume. Because of the non-invasive nature of these measurements and their ease of use, the method has been widely used in various medically related applications. The goal of this paper was to review and describe the uses and findings of such TDC measurements, considering and including the wide array of medical applications. The review is in part based on information derived from an analysis of published material obtained via literature searches of four major electronic databases and, in part, based on the author's experience with the TDC measurement methods and their various applications and his professional experiences. The databases searched were PubMed, Web of Science, EMBASE, and CINAHL Complete. Based on the initial search criteria, a total of 1257 titles were identified. After removing duplicates and filtering according to relevancy, 160 remained for detailed further review. In some cases, the bibliography of these retrieved articles provided additional sources. The findings demonstrate multiple research and medical uses and applications of TDC measurements, focusing on detecting and quantifying localized edema and lymphedema in multiple target sites. These include the upper and lower extremities, breasts, and trunk as regions involved in medical conditions causing lymphedema. In addition, the findings suggest that TDC evaluations are a convenient, non-invasive method to study and evaluate other conditions impacting skin, including diabetes mellitus and skin wounds or ulcers. Its ability to detect aspects of tissue changes simply and rapidly at almost any anatomical location makes it a useful tool for investigating multiple dermatological conditions and their treatment as future applications of this method.

15.
Cureus ; 15(4): e37522, 2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-37193476

RESUMO

Cardiovascular disease is the number one killer of females in the United States today, and myocardial infarction (MI) plays a role in many of these deaths. Females also present with more "atypical" symptoms than males and appear to have differences in pathophysiology underlying their MIs. Despite both differences in symptomology and pathophysiology being present in females versus males, a possible link between the two has not been studied extensively. In this systematic review, we analyzed studies examining differences in symptoms and pathophysiology of MI in females and males and evaluated possible links between the two. A search was performed for sex differences in MI in the databases PubMed, CINAHL (Cumulative Index to Nursing and Allied Health Literature) Complete, Biomedical Reference Collection: Comprehensive, Jisc Library Hub Discover, and Web of Science. Seventy-four articles were ultimately included in this systematic review. Typical symptoms for both ST-elevation myocardial infarction (STEMI) and non-STEMI (NSTEMI) such as chest, arm, or jaw pain were more common in both sexes, but females presented on average with more atypical symptoms such as nausea, vomiting, and shortness of breath. Females with MI also presented with more prodromal symptoms such as fatigue in days leading up to MI, had longer delays in presentation to the hospital after symptom onset, and were older with more comorbidities than males. Males on the other hand were more likely to have a silent or unrecognized MI, which concurs with their overall higher rate of MI. As they age, females have a decrease in antioxidative metabolites and worsened cardiac autonomic function than male. In addition, at all ages, females have less atherosclerotic burden than mles, have higher rates of MI not related to plaque rupture or erosion, and have increased microvasculature resistance when they have an MI. It has been proposed that this physiological difference is etiologic for the male-female difference in symptoms, but this has not been studied directly and is a promising area of future research. It is also possible that differences in pain tolerance between males and females may play a role in differing symptom recognition, but this has only been studied one time where females with higher pain thresholds were more likely to have unrecognized MI. Again, this is a promising area for future study for the early detection of MI. Finally, differences in symptoms for patients with different atherosclerotic burden and for patients with MI due to a cause other than plaque rupture or erosion has not been studied and are both promising avenues to improve detection and patient care in the future.

16.
Cureus ; 15(10): e47074, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-38021500

RESUMO

Background and objective Since the overturning of Roe v. Wade, there has been an increased interest in vasectomy procedures. This study aims to analyze interest, knowledge, and inquiries about the vasectomy procedure among urology patients and osteopathic medical students since this overturn. It also seeks to determine if this data varies between the ages and sexes of participants. It is hoped that the findings will aid in the development of a standardized educational plan that might be provided to urologists for future use with patients and their partners. Methods Surveys consisting of 10 questions regarding interests, knowledge, and inquiries about vasectomy procedures and the changes in interest following the Roe v. Wade decision were distributed to urology patients and osteopathic medical students. Results Female students had an increased interest in their current or future male partner obtaining a vasectomy procedure compared to a year ago, whereas older urology patients and male students did not. Based on the responses to the posed queries, the most important information to include in a standardized educational plan for patients is the overall risks and their likelihood, the likelihood of reversal, and the procedure's recovery time and surgical details. Conclusion Female students' increased interest in the vasectomy procedure may be due to the recent overturn of Roe v. Wade. Therefore, physicians must counsel their male patients' female partners or interested females appropriately regarding vasectomies, as more may now be interested. Additionally, an educational plan based on this study's data may be utilized with future urology patients. Placing emphasis on what patients want to know may help ease patient's associated anxiety with their future procedure and strengthen the relationship between the patient and physician.

17.
Cureus ; 15(7): e41573, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-37554614

RESUMO

Background and objective Lymphedema is a condition caused by impaired lymphatic function. Acquired lymphedema is often due to neoplasia, infection, trauma, or radiation damage. Most patients rely on advice from fellow patients and personal research to manage their symptoms. We believe coping mechanisms for lymphedema can be more streamlined and made easily accessible if the most common effective strategies are determined and collected in a single repository for reference. To that end, we aimed to assess the experiences of lymphedema patients and the coping mechanisms they employed. Methods Feedback from lymphedema patients was obtained using a 19-item questionnaire-based survey distributed to multiple online lymphedema support groups. It focused on the type of lymphedema and its effect on the respondents and sought data to characterize coping mechanisms that individuals with lymphedema use and their effectiveness. Results The respondents (n=400) had a median age of 55 years (range: 18-83 years). The overall mean BMI was 35.8 kg/m2, with respondents with lower extremity (LE) lymphedema having a greater mean BMI (38.4 vs. 31.0, p<0.05). Most of the respondents were female (n=382, 95.5%). LE lymphedema was more common (n=280, 70%) than the upper extremity (UE) variant (n=120, 30%). Within the LE group, 99 were unilateral (35.4%) and 181 were bilateral (64.6%). Moderate restriction was the most reported level with 44% in the unilateral group and 64% in the bilateral group. Stretching, low-impact exercise, manual lymphatic drainage (MLD), and compression bandages were the most commonly used coping methods and most of the respondents rated them as somewhat effective. Of note, 30% of respondents in either group rated increased water intake as either slightly, moderately, or very helpful; 25% of respondents also rated decreased alcohol intake as very helpful. The use of a therapist and family and doctor support was rated as extremely helpful. Within the UE group, 105 were unilateral (87.5%) and 15 were bilateral (12.5%). The most common cause of UE lymphedema was breast cancer-related (98/120, 81.7%) followed by melanoma treatment. Mild restriction was the most reported level (n=48, 45.7%). The UE group had similar results as the LE group in terms of coping mechanisms, dietary changes, and psychosocial support. Conclusion Based on the experiences of the lymphedema patients surveyed, the management of the condition is multifactorial and hence not compatible with a one-size-fits-all strategy. LE lymphedema was more common than the UE variant; but both groups reported engaging in stretching, low-impact exercise, manual lymphatic drainage, and compression bandages with similar rates of satisfaction reported in both groups. Dietary changes were not commonly employed. Therapy, doctor, and family support were the most commonly used support mechanisms, with high satisfaction among both groups. The overall coping mechanisms and their ratings in terms of efficacy between UE and LE groups were similar although the impact of quality of life was greater for bilateral conditions. We believe our findings represent the first steps to providing information potentially useful to aid future and current lymphedema patients in finding the coping methods that work best for them.

18.
Cureus ; 15(5): e38647, 2023 May.
Artigo em Inglês | MEDLINE | ID: mdl-37292526

RESUMO

Background The clinical efficacy of a compression application has been often limited to the assessment of the change in limb volume, change in clinical symptoms (i.e., wound size, pain, range of motion, incidence of cellulitis), or vascular hemodynamics of the whole limb. Assessing compression-related biophysical changes of a localized area, such as around a wound, or in an area outside of an extremity cannot be objectively assessed by these measurements. Tissue dielectric constant (TDC) values, which provide a measure of the local tissue water (LTW) content, offer an alternative method to document variation in the LTW content of the skin in a specific location. The goals of the present research were (1) to characterize TDC values, expressed as percentage tissue water, from multiple areas along the medial aspect of the lower leg of healthy volunteers and (2) to explore the potential utilization of the TDC values to assess change in tissue water content in a localized area following compression applications. Methods TDC was measured at 10, 20, 30, and 40 cm proximal to the medial malleolus on the medial aspect of the right leg of 18 young adult healthy women with an age range of 18-23 years and a body mass index of 18.7 to 30.7kg/m2.. TDC was measured at baseline and after 10 minutes of exercise with compression in place on three separate days during which three different compression applications were assessed: a longitudinal elastic stockinette, a two-layer cohesive compression kit, and a combination of the two. Leg circumferences and compression-related interface pressures were also measured. Results Test-Retest Reliability of circumferential measurements and TDC values evaluated using Intraclass correlation coefficient (ICC 3,1) revealed excellent and moderate-to-good reliability, respectively. Analysis of TDC values along the length of the limb using Friedman's test, revealed a small but statistically significant overall difference among baseline TDC values attributable to a smaller value at 40 cm. The largest difference in cumulative average was 7.7% which occurred between 20 and 40 cm, with all other differences between locations less than 1%. No significant differences between the compression applications were observed. Conclusion  The present findings demonstrate the utility of TDC measurements as a modality to assess compression-related changes in the legs of healthy women as a foundation for their potential use in assessing outcomes of compression treatments for persons with lower extremity edema or lymphedema. The absence of a significant change in TDC values in these healthy non-edematous conditions and the demonstrated reliability of the TDC measurements on three different days provides further support for the utility of such applications of TDC measurements. The extension to patients with lower extremity edema or lymphedema needs to be evaluated.

19.
Cureus ; 15(9): e46224, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37905258

RESUMO

The prevalence of opioid use in the current opioid epidemic era has led to a public health emergency due to the ties to mortality and morbidity. Studies have investigated opioids' impacts on different aspects of cardiovascular health, although there seems to be a lack of a current concise review. Therefore, the aim of this literature review is to provide a summary of the most recent studies from the past decade that postulate a connection between opioids and their impact on cardiovascular health while highlighting conflicting areas among published research. For this literature review, three databases, PubMed (NLM), EMBASE, and Web of Science (Core Collection), were searched for full peer-reviewed articles written in English about human subjects and published between 2013 and 2023 inclusive. The following initial approach was to search for terms in the title of articles: "opioid AND ("vascular" OR "artery" OR "vein" OR "heart rate" OR "infarct" OR "stroke" OR "aortic" OR "cardiovascular disease"). After assessing for duplicate articles from the three databases, the remaining articles were assessed for inclusion eligibility. In the present review, a brief description of the overall role of opioid receptors is provided followed by the literature findings. These findings indicate potentially important negative impacts of opioid use on cardiovascular health in a number of areas. These include opioid-associated increases in the following: (1) vascular aging based on demonstrated increases in arterial stiffness, (2) opioid-related reductions in heart rate variability (HRV) and its implications on morbidity and mortality, (3) opioid's impacts on coronary artery and coronary heart disease (CHD), (4) opioids as a risk factor for atrial fibrillation (AF) and (5) opioid use as a risk factor for vascular occlusion processes. In addition to these broad cardiovascular effects, other aspects of concern are related to the potential impacts of withdrawal from opioid use, which, when done rapidly, are associated with increases in blood pressure and a decrease in HRV.

20.
Cureus ; 15(6): e40687, 2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-37485203

RESUMO

The underpinning of Chronic Venous Insufficiency (CVI) is valvular dysfunction, which manifests on a spectrum depending on the severity of insufficiency and duration of the disease. The mainstay of treatment relies on compression therapy of a proper type and intensity. In older adults, special consideration must be taken during the patient encounter to account for age-related factors. This review discusses the clinical presentation, diagnosis, and mimicking of CVI, focusing mainly on older adults. The epidemiology, risk factors, disease burden, and grave complications -- such as thrombosis and ulceration, are reviewed. The physiological impacts of CVI are described, providing the background for treatment strategies, including non-invasive, medical, and surgical therapies. The findings show advanced age to be an important risk factor contributing to CVI and that other age-related factors add to the risk of severe complications. Clinical assessments combined with objective measurements that assess localized skin water using tissue dielectric constant values or whole limb assessments may aid in the differential diagnosis. Furthermore, understanding the mechanism of action of compression therapy, the mainstay of CVI treatment, and its physiological impacts, allows for its informed use in geriatric patients with increased risks of potential compression-related side effects.

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