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BACKGROUND: There is widespread interest in the design of portable electrochemical sensors for the selective monitoring of biomolecules. Dopamine (DA) is one of the neurotransmitter molecules that play a key role in the monitoring of some neuronal disorders such as Alzheimer's and Parkinson's diseases. Facile synthesis of the highly active surface interface to design a portable electrochemical sensor for the sensitive and selective monitoring of biomolecules (i.e., DA) in its resources such as human fluids is highly required. RESULTS: The designed sensor is based on a three-dimensional phosphorous and sulfur resembling a g-C3N4 hornet's nest (3D-PS-doped CNHN). The morphological structure of 3D-PS-doped CNHN features multi-open gates and numerous vacant voids, presenting a novel design reminiscent of a hornet's nest. The outer surface exhibits a heterogeneous structure with a wave orientation and rough surface texture. Each gate structure takes on a hexagonal shape with a wall size of approximately 100 nm. These structural characteristics, including high surface area and hierarchical design, facilitate the diffusion of electrolytes and enhance the binding and high loading of DA molecules on both inner and outer surfaces. The multifunctional nature of g-C3N4, incorporating phosphorous and sulfur atoms, contributes to a versatile surface that improves DA binding. Additionally, the phosphate and sulfate groups' functionalities enhance sensing properties, thereby outlining selectivity. The resulting portable 3D-PS-doped CNHN sensor demonstrates high sensitivity with a low limit of detection (7.8 nM) and a broad linear range spanning from 10 to 500 nM. SIGNIFICANCE: The portable DA sensor based on the 3D-PS-doped CNHN/SPCE exhibits excellent recovery of DA molecules in human fluids, such as human serum and urine samples, demonstrating high stability and good reproducibility. The designed portable DA sensor could find utility in the detection of DA in clinical samples, showcasing its potential for practical applications in medical settings.
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Dopamina , Técnicas Electroquímicas , Dopamina/análisis , Dopamina/orina , Humanos , Técnicas Electroquímicas/métodos , Técnicas Electroquímicas/instrumentación , Compuestos de Nitrógeno/química , Límite de Detección , Azufre/química , Electrodos , Técnicas Biosensibles/métodos , Grafito/química , Fósforo/química , Propiedades de SuperficieRESUMEN
Objective: This study aimed to assess the presence and type of malignancy in patients who underwent thyroid surgery for solitary thyroid nodules. Methods: A retrospective review was performed of the case notes of all adult patients with solitary thyroid nodules who underwent thyroid surgery from 1 January 2019 to 31 October 2022. All patients had solitary thyroid nodules identified by ultrasonography. The electronic records of our pathology department were used to determine the pathological diagnosis. Results: Forty-two patients with solitary thyroid nodules underwent thyroid surgery. The mean age at presentation was 39.1 ± 12.6 years, and 76.2% of patients were female. The malignancy rate was 31%. Further histopathological analysis found that malignant solitary thyroid nodules were mostly papillary carcinoma. Conclusion: This study indicates that solitary thyroid nodules should be evaluated thoroughly and treated with a high index of suspicion because they have a high chance (31%) of being malignant.
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Background Cardiotoxicity, produced as an adverse effect of anticancer therapy, is a common issue during cancer treatment. Acute coronary syndrome, myocarditis, arrhythmias, or heart failure can all be symptoms of this issue. Little is known about its occurrence among Saudi Arabian cancer patients. This study aims to investigate factors linked to anticancer therapy-related cardiotoxicity. Methods A retrospective study was conducted from April 2020 to May 2022 at the King Khalid Hospital, Najran, Saudi Arabia. The study included adult cancer patients receiving anticancer therapy, regardless of their cardiovascular disease history. Univariate analysis was used to investigate factors associated with the occurrence of cardiotoxicity related to anticancer therapy. Results Of 78 patients receiving anticancer therapy, cardiotoxicity occurred in 12 (15.4%) patients. The mean age was 56.5 ± 13.4 years, with 33.3% aged over 65 years. Comorbidities included hypertension (44; 56.4%), diabetes (41; 52.6%), dyslipidemia (13; 16.7%), smoking (16; 20.5%), heart disease (6; 7.7%), trastuzumab use (9; 11.5%), and chronic kidney disease (2; 2.6%). The most common cancers were breast cancer and gastrointestinal cancer (27.6% each). Monoclonal anticancer agents 35 (46.1%) and alkylating agents 29 (38.2%) were commonly used chemotherapies. Cardiac protective agents were used in 16 (21.1%) of patients, with angiotensin-converting enzyme (ACE) inhibitors 15 (19.7%) and statins (13; 17.1%) being the most prescribed. Baseline ejection fraction (EF) was normal in 69 (90.8%) of cases. The follow-up duration was 1.93 ± 1.90 years. A drop in EF occurred in five (6.6%) of cases. Dyslipidemia (OR: 0.12; 95% CI: 0.03-0.47, p=0.002), previous heart disease (OR: 0.14; 95% CI: 0.02-0.81, p=0.029), and impaired baseline EF (p=0.029) were associated with increased risk of cardiotoxicity. Statin (OR: 0.22; 95% CI: 0.05 to 0.84, p=0.028) and antiplatelet agents (OR: 0.19; 95% CI: 0.03 to 1.01, p=0.051) were protective agents against cardiac toxicity. Conclusion Effective anti-cancer therapy may be accompanied by an increased risk of cardiotoxicity. In this study, a history of prior heart disease, dyslipidemia, low baseline ejection fraction, and the administration of multiple anticancer therapy agents was associated with cardiotoxicity. Proactive management strategies aimed at mitigating the potential cardiotoxic effects of anti-cancer therapies are crucial.
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Background: Saudi Arabian population has amongst the highest prevalence of obesity globally. Apart from nutritional measures, physical activity is considered a major modifiable risk factor for the prevention of obesity and its consequences. An insight into the physical activity and awareness parameters of healthcare professionals and those in the making can provide an insight into how prepared we are to deal with the epidemic of non-communicable diseases. The aim of this study is to find out about the degree of physical activity undertaken by the medical students, faculty and staff at the College of Medicine, King Khalid University, as well as their awareness regarding physical activity guidelines. Methods: This study surveyed 300 adult participants - medical students, faculty and staff - in the College of Medicine, King Khalid University. An international validated questionnaire was used to assess the physical activity profile of participants as well as BMI parameters. Moreover, awareness and knowledge of the recommended physical activity guidelines for adults were also assessed. Results: The study participants comprised around 83% students, 9% faculty members, and 7% staff members. Around 55% of the participants were male, while the rest were female. More than 65% of participants across all categories reported low levels of physical activity, with only about 4.5% of participants across various age groups reporting high levels of physical activity. There was no significant difference by gender across the group (P value = 0.227). Only 17% of the study participants were knowledgeable of the recommended physical activity guidelines for adults. Conclusion: We found a low level of physical activity as well as inadequate awareness about the physical activity guidelines amongst our study participants. This study reiterates the urgent need for well-researched and well-funded health promoting interventions to promote physical activity, especially in the context of health professions' education.
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Background: Mild-to-moderate postoperative pain is common after surgical procedures of the thyroid. Opioid analgesics have been commonly prescribed in such cases, but their use has been debated owing to concerns regarding the addictive nature of opioids. Recently, experts from the Endocrine Surgery Section of the American Head and Neck Society released a consensus document to limit the use of opioids as the first-line pain control medication after head and neck or endocrine procedures. However, differences in pain management prescriptions have been noted in many settings. This study aims to assess the post-thyroid surgery pain control medication prescription practices of head and neck and endocrine surgeons. Methods: This study retrospectively reviewed the charts of 105 adult patients who underwent thyroid surgery (total thyroidectomy, thyroid lobectomy, or subtotal thyroidectomy) by head and neck or endocrine surgeons. The type of prescribed pain medication at hospital discharge postoperatively was then retrieved from each patient's discharge medication list. Descriptive statistics mean, standard deviations, frequencies, and percentages were computed, while the Chi-square test was applied to measure the significant differences among variables at a 5.00% significant level. Results: An outpatient oral opioid, in the form combining paracetamol and codeine, was prescribed for 62 (59%) patients, whereas 43 (41%) were discharged on paracetamol only. Conclusion: The use of opioids is the practice pattern for pain management among some head and neck or endocrine surgeons despite emerging evidence that supports the use of non-opioid and other alternative analgesic strategies in outpatient thyroid and parathyroid surgery. Further research and quality improvement interventions should be geared towards leading all health professionals to appropriate prescription practices to improve patient safety and reduce unnecessary opioid prescriptions.
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BACKGROUND AND OBJECTIVES: Intragastric balloon (IGB) is a safe option for obesity management. However, studies determining the factors influencing the procedure's outcomes are scarce. Therefore, our goal was to determine the factors affecting weight reduction after IGB insertion. MATERIALS AND METHODS: This retrospective study included 126 obese patients who underwent IGB treatment using the ORBERA® Intragastric Balloon System. Patients' records were retrieved; and demographic data, initial body mass index (BMI), complications, compliance with both diet and exercise programs, and percentage of excess weight reduction were recorded. RESULTS: The study included 108 female (85.7%) and 18 male (14.3%) patients. The mean age was 31.7 ± 8.1 years. The percentage of excess weight loss (EWL) was 55.8 ± 35.7%. The mean weight loss was 13.01 ± 7.51 kg. A significant association was found between EWL and age, initial weight, initial body mass index, and the number of pregnancies. No major complications were observed. However, the balloon had to be removed early in two patients (1.59%) due to its rupture and in two other patients (1.59%) due to severe gastritis. CONCLUSIONS: IGB therapy is a safe and effective option for obesity management, associated with low rates of complications. The EWL after IGB insertion is significantly higher among older patients, those with a relatively low initial body mass index, those with a longer duration of IGB insertion, and female patients with less parity. Larger prospective studies are needed to support our results.
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BACKGROUND: COVID-19 preventive measures required a drastic shift to online teaching-learning in most of countries. Institutions used different combinations of live online lectures (synchronous) requiring students to attend the class in real-time, as well as recorded lectures uploaded by the instructors to be accessed by students as per their own convenience (asynchronous). We undertook this study to assess and compare the perceptions of students regarding their learning experiences in the synchronous versus asynchronous mode of instruction using their teaching-learning during the compulsory online mode of instruction at the peak of the COVID-19 pandemic. METHODOLOGY: This cross-sectional questionnaire-based study received responses from 122 final-year medical students studying at the College of Medicine, King Khalid University, Abha, Saudi Arabia. An online 5-point Likert scale-based questionnaire was used to collect data regarding experience and perception towards synchronous and asynchronous learning. Statistical analysis was done using Statistical Package for Social Sciences (SPSS) version 21.0. A P-value less than 0.05 was considered significant. RESULT: All the students found both synchronous and asynchronous learning to be equally satisfying, enjoyable and comfortable. No statistically significant difference was found when both the methods were analyzed for enhancement of knowledge. The students opined that asynchronous learning helped them manage their time better whereas synchronous learning encouraged more interaction during the live lectures. CONCLUSION: Overall, the students' perceptions regarding both synchronous and asynchronous online learning were positive. As both methods have their advantages/limitations, a mix of both synchronous and asynchronous methods may be adopted depending upon the content of the topic and the desired learning outcomes.
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COVID-19 , Educación a Distancia , Estudiantes de Medicina , Humanos , Arabia Saudita , Estudios Transversales , Pandemias , Universidades , PercepciónRESUMEN
Two methods are reported for the one-pot preparation of high concentrations of gold nanoparticles (AuNPs) embedded throughout sodium polyacrylate hydrogels; this stabilises the AuNP in even extremely high ionic strength environments, and enables them to act as effective catalysts for the hydride-reduction of nitrophenols and of dyes, with zero order kinetics.
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Robot assisted thyroid surgery has the advantage of a superior field vision and technical advancements of robotic technology that have permitted novel remote access thyroid surgical approaches. Gasless trans-axillary robot-assisted thyroidectomy has been proved to be among the most current feasible approaches. This approach offers an excellent cosmetic outcome, with comparable outcomes to conventional surgical approaches. This review aims to provide details of this specific remote access technique for thyroid resection with most recent evidences in the literature.
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Amyand's hernia is a rare type of hernia where the vermiform appendix is within an inguinal hernia sac. Tumors of the appendix are quite uncommon. The coincidence of an Amyand's hernia with neuroendocrine tumor of the appendix, as in our case, is even more rarely reported. We report the case of an 81-year-old male who presented with an incarcerated right inguinal hernia. After resuscitation, the clinical diagnosis was confirmed by computed tomography. It showed an incarcerated right inguinal hernia which contained the distal ileum, cecum, thickened appendix, as well as a small amount of fluid. Subsequently, the patient was prepared for emergency surgery. During the operation, the hernia sac was found and opened. The appendix was swollen. Therefore, appendectomy was performed. The inguinal defect was repaired using the Modified Bassini Technique. The patient had an uneventful postoperative recovery and surprisingly the histopathology of the appendix revealed a 1.5cm well-differentiated low grade neuroendocrine tumor (carcinoid) of the appendix tip. An incidental finding of neuroendocrine tumor of the appendix in a patient with s hernia is extremely rare. A high index of suspicion is the key to diagnose such a coincidence in order to safely and optimally treat such a condition.
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PATIENT: Female, 68 FINAL DIAGNOSIS: Gallbladder agenesis with situs inversus totalis Symptoms: Epigastric pain ⢠jaundice MEDICATION: - Clinical Procedure: - Specialty: Surgery. OBJECTIVE: Rare disease. BACKGROUND: Situs inversus totalis is an inherited condition characterized by the mirror-image transposition of thoracic and abdominal organs. Gallbladder agenesis, which has normal bile ducts, is a rare congenital condition that occurs in 13 to 65 people out of 100 000. A common bile duct (CBD) stone or choledocholithiasis in patients with gallbladder agenesis is even rarer. CASE REPORT: We report the case of a 68-year-old woman who presented with epigastric pain and jaundice. She was not known to have situs inversus totalis. Abdominal ultrasound showed a large stone in the CBD, which could not be extracted by endoscopic retrograde cholangiopancreatography (ERCP), necessitating exploration. The gall-bladder and cystic duct were found to be absent. Incisional exploration of the CBD was performed, and a large stone was removed. A choledochoscope was used to identify the remnants and exclude the presence of ectopic gallbladder, and a T-tube was placed into the CBD. CONCLUSIONS: Gallbladder agenesis in a patient with situs inversus totalis is extremely rare, with no single reported case identified in the literature. In addition, our case showed a rare complication of ERCP - a failure to extract the CBD stone - and illustrates a way to overcome this complication.
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Cervical thymic cysts (CTCs) are unusual lesions, representing only 1% of cystic cervical masses. Diagnosis of this condition in adults is even rarer. We report a 34-year-old female who presented with asymptomatic progressively growing left-sided neck swelling. Neck ultrasound (US) showed a large cystic lesion with septation, compressing the ipsilateral vessels. Magnetic resonance imaging (MRI) confirmed the US findings. Surgical excision was performed which subsequently showed findings consistent with CTC. CTC in adult is extremely rare, with few reported cases identified in the literature. Thymic gland anomalies in the neck are the consequences of an arrest in the descent of the gland, sequestration of the thymic tissue, or failure of involution. The diagnosis of this condition is rarely done prior to surgical excision. The clinical presentation, radiologic imaging, surgical findings, and histologic appearance are all essential components to make the correct diagnosis of this very rare differential diagnosis of cystic lateral neck swelling.