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1.
Sensors (Basel) ; 23(1)2022 Dec 30.
Artigo em Inglês | MEDLINE | ID: mdl-36616998

RESUMO

In this paper, we report a fast, linear wide-range hybrid flexible sensor based on a novel composite of strontium titanate (SrTiO3) and poly 3,4 ethylenedioxythiophene polystyrene sulfonate (PEDOT: PSS) as a sensing layer. Inter-digitate electrodes (IDEs) were printed for humidity monitoring (finger: 250 µm; spacing: 140 µm; length: 8 mm) whilst a meander-based pattern was printed for the temperature measurement (meander thickness: 180 µm; spacing: 400 µm) on each side of the PET substrate using silver ink. Moreover, active layers with different concentration ratios were coated on the electrodes using a spray coating technique. The as-developed sensor showed an excellent performance, with a humidity measurement range of (10-90% RH) and temperature measurement range of (25-90 °C) with a fast response (humidity: 5 s; temperature: 4.2 s) and recovery time (humidity: 8 s; temperature: 4.4 s). The reliability of the sensor during mechanical bending of up to 5.5 mm was validated with a reliable performance. The sensor was also used in real-world applications to measure human respiration. For this, a suggested sensor-based autonomous wireless node was included in a 3D-printed mask. The manufactured sensor was an excellent contender for wearable and environmental applications because of its exceptional performance, which allowed for the simultaneous measurement of both quantities by a single sensing device.


Assuntos
Impressão Tridimensional , Dispositivos Eletrônicos Vestíveis , Humanos , Umidade , Reprodutibilidade dos Testes , Temperatura
2.
Cureus ; 16(7): e65851, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-39219946

RESUMO

Introduction Complex distal humerus fractures pose significant challenges in orthopedic surgery, especially when traditional open reduction and internal fixation (ORIF) is not feasible. Primary elbow arthroplasty has emerged as an alternative treatment option for these fractures, but its application remains limited. This study aimed to evaluate the functional outcomes, patient selection criteria, and follow-up results of primary elbow arthroplasty in the management of complex distal humerus fractures. Methods A retrospective review was conducted on 15 patients who underwent primary elbow arthroplasty for Orthopaedic Trauma Association (OTA) type C distal humerus fractures between 2017 and 2023 at our institution. Inclusion criteria were patients aged 18 years or older who were offered either total elbow or hemiarthroplasty for acute complex distal humerus fracture. Data were collected from patient medical records, including demographic information, fracture classification, surgical details, and postoperative follow-up. Functional outcomes were assessed using the Oxford Elbow Score (OES) and Mayo Elbow Performance Score (MEPS). Complications were documented, and descriptive statistics were used to summarise the findings. Results The mean age of the patients was 71.8 years (IQR 17 years), with 12 females and three males. The mean time to surgery was 14.7 days post-injury (IQR: 12 days). The mean follow-up duration was 52 weeks (range: 8-234 weeks, IQR: 27 weeks) and variability was noted. The mean flexion-extension arc at the final follow-up was 93° (IQR: 32.5°). The mean OES was 46 (IQR: 22), and the mean MEPS was 75 (IQR: 37), indicating good to excellent functional outcomes. Scores for two patients were not available due to dementia. Reported complications included one case of ulnar sensory symptoms and one case requiring metalwork removal following olecranon osteotomy. Conclusion Primary elbow arthroplasty provides a viable treatment option for complex distal humerus fractures, demonstrating significant functional improvements and high patient satisfaction. However, the variability in follow-up and subjective decision-making underscores the need for standardized protocols. Future multicenter, prospective studies with larger cohorts and standardized follow-up protocols are recommended to confirm these findings and optimize patient care.

3.
Antioxidants (Basel) ; 12(5)2023 Apr 30.
Artigo em Inglês | MEDLINE | ID: mdl-37237900

RESUMO

Media supplementation has proven to be an effective technique for improving byproduct yield during microbial fermentation. This study explored the impact of different concentrations of bioactive compounds, namely alpha-tocopherol, mannitol, melatonin, sesamol, ascorbic acid, and biotin, on the Aurantiochytrium sp. TWZ-97 culture. Our investigation revealed that alpha-tocopherol was the most effective compound in reducing the reactive oxygen species (ROS) burden, both directly and indirectly. Adding 0.7 g/L of alpha-tocopherol led to an 18% improvement in biomass, from 6.29 g/L to 7.42 g/L. Moreover, the squalene concentration increased from 129.8 mg/L to 240.2 mg/L, indicating an 85% improvement, while the squalene yield increased by 63.2%, from 19.82 mg/g to 32.4 mg/g. Additionally, our comparative transcriptomics analysis suggested that several genes involved in glycolysis, pentose phosphate pathway, TCA cycle, and MVA pathway were overexpressed following alpha-tocopherol supplementation. The alpha-tocopherol supplementation also lowered ROS levels by binding directly to ROS generated in the fermentation medium and indirectly by stimulating genes that encode antioxidative enzymes, thereby decreasing the ROS burden. Our findings suggest that alpha-tocopherol supplementation can be an effective method for improving squalene production in Aurantiochytrium sp. TWZ-97 culture.

4.
Arch Bone Jt Surg ; 10(4): 353-357, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-35721587

RESUMO

Background: This study aims to demonstrate the impact of the COVID-19 pandemic on providing trauma services at our district general hospital. We aim to identify the impact on specific areas of theatre delay to help optimize theatre efficiency and generate better protocols and improve patient flow for future pandemic waves. Methods: Patients who underwent orthopaedic trauma surgery at our hospital between July-August 2019 (pre-COVID-19) and 2020 (first UK wave of COVID-19) were identified retrospectively and grouped by year of operation. Type of operation was recorded, including time for sending, anaesthetic induction, surgical preparation, operating time, and time for transfer to recovery. The two groups were compared for analysis. Results: Case numbers were similar in both 2019 and 2020 (215vs.213 operations), with a similar proportion being hip fractures (39.1% and 36.6%), respectively. Median sending time (40vs.23 minutes, P <0.00001) and induction time (13vs.8 minutes, P<0.00001) were increased in 2020, a 74% and 63% increase compared to 2019, respectively. Median surgical preparation time (35vs.37 minutes, P=0.06) and operating time (56vs.50 minutes, P=0.16) were not statistically significant. Transfer time in 2020 (16vs.13 minutes, P<0.00001) was significantly increased. Overall case time increased in 2020 (2:40vs.2:11, P<0.00001) by 29 minutes. Conclusion: COVID-19 had a significant impact on theatre efficiency in our hospital, causing multiple points of delay. As hospitals across the UK restart crucial elective services, focus should be given to maximizing theatre efficiency by providing rapid access COVID-19 testing for patients undergoing emergency surgery. We have proposed and implemented several steps for better theatre utilization.

5.
Pilot Feasibility Stud ; 8(1): 130, 2022 Jun 24.
Artigo em Inglês | MEDLINE | ID: mdl-35751098

RESUMO

BACKGROUND: Maternal sepsis is a life-threatening condition, defined by organ dysfunction caused by infection during pregnancy, childbirth, and the postpartum period. It is estimated to account for between one-tenth and half (4.7% to 13.7%) of all maternal deaths globally. An international stakeholder group, including the World Health Organization, developed a maternal sepsis management bundle called "FAST-M" for resource-limited settings through a synthesis of evidence and international consensus. The FAST-M treatment bundle consists of five components: Fluids, Antibiotics, Source identification and control, assessment of the need to Transport or Transfer to a higher level of care and ongoing Monitoring (of the mother and neonate). This study aims to adapt the FAST-M intervention and evaluate its feasibility in Pakistan. METHODS: The proposed study is a mixed method, with a before and after design. The study will be conducted in two phases at the Liaquat University of Medical and Health Sciences, Hyderabad. In the first phase (formative assessment), we will adapt the bundle care tools for the local context and assess in what circumstances different components of the intervention are likely to be effective, by conducting interviews and a focus group discussion. Qualitative data will be analyzed considering a framework method approach using NVivo version 10 (QSR International, Pty Ltd.) software. The qualitative results will guide the adaptation of FAST-M intervention in local context. In the second phase, we will evaluate the feasibility of the FAST-M intervention. Quantitative analyses will be done to assess numerous outcomes: process, organizational, clinical, structural, and adverse events with quantitative comparisons made before and after implementation of the bundle. Qualitative analysis will be done to evaluate the outcomes of intervention by conducting FGDs with HCPs involved during the implementation process. This will provide an understanding and validation of quantitative findings. DISCUSSION: The utilization of care bundles can facilitate recognition and timely management of maternal sepsis. There is a need to adapt, integrate, and optimize a bundled care approach in low-resource settings in Pakistan to minimize the burden of maternal morbidities and mortalities due to sepsis.

6.
J Ayub Med Coll Abbottabad ; 33(1): 34-38, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33774951

RESUMO

BACKGROUND: There are various implant choices to fix unstable per- trochanteric fractures. The aim of this study was to compare the outcomes of dynamic hip screw and proximal femur nail for unstable per-trochanteric fractures including complications associated with both fixations. METHODS: A retrospective analysis done on pertrochanteric fractures of femur who were treated with Dynamic hip Screw (DHS) and Proximal Femur Nail (PFN). The data was taken from our hospital hip data base for the past two years from January 2017 to January 2019. Data of 174 patients was analysed, divided in to Group A with DHS (n=122) and Group B with PFN (n=52). Follow up included X-ray (anteroposterior and lateral) views for fracture union and collapse, femur neck shortening, implant position and identification of mode of failure or collapse (cut out risk) by using tip-apex distance. The Harris hip score used to evaluate mobility status and other functional outcomes. RESULTS: The mean age in years of patients treated with PFN and DHS were 55.9 and 59.8, ranging from 39-83 years. The mean of Harris hip score at 2 year was 69.28±9.99 in DHS group and 72.12±9.71 in PFN group with the p-value 0.31. The mean of limb shortening was 12mm in DHS and 9 mm in PFN group. In DHS group, four cases had tip-apex distance of 39 mm and reported implant cut out that needs revision of surgery. CONCLUSIONS: Proximal Femur Nail group demonstrated no implant cut out and less mean limb length shortening where as other parameter like functional outcomes, fracture union, rate of infection, hospital stay and postoperative pain are not significantly different in two groups.


Assuntos
Pinos Ortopédicos/efeitos adversos , Parafusos Ósseos/efeitos adversos , Fêmur/cirurgia , Fixação Interna de Fraturas , Fraturas do Quadril/cirurgia , Adulto , Idoso , Idoso de 80 Anos ou mais , Fixação Interna de Fraturas/efeitos adversos , Fixação Interna de Fraturas/instrumentação , Fixação Interna de Fraturas/estatística & dados numéricos , Humanos , Tempo de Internação/estatística & dados numéricos , Pessoa de Meia-Idade , Complicações Pós-Operatórias , Resultado do Tratamento
7.
Arch Bone Jt Surg ; 9(5): 527-535, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34692935

RESUMO

BACKGROUND: The aim of our study is to report the clinical and radiological outcomes of a series of prospectively enrolled patients who have had double-row transosseous equivalent rotator cuff repairs, where all-suture anchors were used as medial-row anchors, with a minimum follow-up of 1 year. METHODS: Twenty-two consecutive patients underwent arthroscopic transosseous equivalent double-row rotator cuff repair using all-suture anchors as medial-row anchors. Oxford Shoulder Score, Constant Score and Visual Analogue Scale pain score, together with shoulder range of motion, were used preoperatively and at 3 months, 6 months and final follow-up. Radiological evaluation was performed with magnetic resonance imaging at one-year post surgery to assess the structural integrity of the repair and the rate of cyst formation in greater tuberosity. RESULTS: The patient mean age was 61 years (range 46-75). Minimum follow-up was 1 year, and the mean final follow-up was 15 months (range 12-24). Healing failure in our patients was less than 5% (1/22 patients). There were significant improvements in shoulder function outcome scores at final follow-up. The Constant and Oxford scores were 78 and 44 at final follow-up respectively. There were similar magnitudes of improvement in range of motion (combined abduction and rotation), pain score and supraspinatus strength at final follow up. The improvements in outcome scores were already statistically significant at 3 months (P<.001). Using Kim's classification for cyst formation on T2-weighted MRI images, we observed no fluid or minimal fluid collection in 85% of the patients (17/22 patients). There were no correlations between the grade of bone changes and the clinical outcomes. CONCLUSION: It is safe to use all-suture anchors as medial-row anchors when performing double-row anchor transosseous equivalent rotator cuff repairs. The purported advantages of all-suture anchors may outweigh their perceived disadvantages in rotator cuff repair surgery.

8.
Arch Bone Jt Surg ; 8(6): 729-733, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-33313355

RESUMO

Posterior shoulder dislocation, whilst uncommon, is frequently missed and often associated with a significant defect on the antero-medial aspect of the humeral head (the reverse Hill-Sachs lesion). Several techniques for stabilisation have been described, depending on the size of the lesion. We describe an additional technique for stabilising the shoulder following posterior dislocation by augmenting the reverse Hill-Sachs lesion with layers of extracellular matrix, thus further filling the defect.

9.
J Clin Orthop Trauma ; 11(Suppl 4): S442-S445, 2020 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-32774009

RESUMO

INTRODUCTION: There are suggestions that elective surgery performed during the incubation period of COVID-19 infection may cause an immediate impairment of cell-mediated immunity, leading to high morbidity and mortality. However is contrasting data about the associated mortality. Since the outbreak, our unit has maintained a prospective database recording Trauma and Orthopaedic surgical activity. Our aim was to share our experience of the first 3 months with prospective data on outcome of essential surgery during the covid-19 peak. Our focus in this report was on the mortality rate as services begin to open. Methods: We prospectively collected data during the peak of the pandemic in the UK, for fracture neck of femur patients (NOF) the most commonly performed surgical procedure and the most vulnerable during this period. We compared this Covid-19 cohort of NOFs against a cohort of NOF's during the same time in 2019 and another cohort of NOF's in 2020 outside the lockdown period to compare mortality rates and give a broader perspective. RESULTS: During the period March 1, 2020 to May 31, 2020, total of 206 patients were operated. Ninety-four fracture NOF and another one hundred twelve essential surgical procedures were performed. In the NOF cohort, there were nine patients that died. Three of them were covid-19 positive, one was not tested and the rest five were covid-19 negative. There was no mortality reported in the non NOF group. Conclusion: In our unit, during the lock down period, mortality rate in patients undergoing fracture NOF was not significantly different from a similar cohort earlier in the year and similar period last year. We have not observed any mortality, to date in the Non NOF procedures carried out.

10.
Arthrosc Tech ; 9(7): e987-e993, 2020 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-32714809

RESUMO

Despite profound advancements in arthroscopic rotator cuff repair (RCR) techniques, radiologic failure rates may be in excess of 60% with repairs of large and massive tears in the elderly population. One of the strategies to improve these healing rates has been "patch" augmentation of the cuff repair. At the same time, superior capsular reconstruction (SCR) has gained significant popularity as an option for irreparable rotator cuff (RC) tears. Some have also advocated performing SCR in addition to arthroscopic RCR to reinforce the repair and improve healing rates. Techniques involving the use of fascia lata, ECM patches, and long head of the biceps (LHB) for SCR to reinforce the cuff repair have all been elegantly described. In this article, we propose a technique that enables a combination of the aforementioned procedures and involves performing RCR with patch augmentation, as well as SCR using LHB. In doing so, the repaired RC is bordered by the patch over its bursal surface and the LHB on the articular surface (functioning as the superior capsule), thus giving us the name "Hamburger technique" (a 3-layered construct).

13.
Am J Med Sci ; 343(4): 334-6, 2012 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-22173048

RESUMO

Although brain abscesses are frequently cryptogenic in origin, bacteria must reach the brain either by direct or hematogenous spread. Right-to-left shunts, caused either by intrapulmonary vascular malformations or congenital heart defects, may allow microorganisms to evade the normal host defenses in the lungs and lead to development of brain abscesses. Two patients recently presented with brain abscesses and were found to have conditions associated with right-to-left shunts. The diagnosis of brain abscess should prompt the clinician to consider right-to-left shunts as a possible predisposing condition for brain abscess.


Assuntos
Malformações Arteriovenosas/diagnóstico , Abscesso Encefálico/diagnóstico , Cardiopatias Congênitas/diagnóstico , Malformações Arteriovenosas/complicações , Abscesso Encefálico/etiologia , Cardiopatias Congênitas/complicações , Humanos , Masculino , Pessoa de Meia-Idade
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