Fast Track Research Articles

A nonlinear optimal control approach for 3-DOF four-cable driven parallel robots

In this article, a nonlinear optimal control approach is proposed for the dynamic model of 3-DOF four-cable driven parallel robots (CDPR). To solve the associated nonlinear optimal control problem, the dynamic model of the 3-DOF cable-driven parallel robot undergoes approximate linearization around a temporary operating point that is recomputed at each time-step of the control method. The linearization relies on Taylor series expansion and on the associated Jacobian matrices. For the linearized state-space model of the 3-DOF cable-driven parallel robot a stabilizing optimal (H-infinity) feedback controller is designed. To compute the controller’s feedback gains an algebraic Riccati equation is repetitively solved at each iteration of the control algorithm. The stability properties of the control method are proven through Lyapunov analysis. The proposed nonlinear optimal control approach achieves fast and accurate tracking of reference setpoints under moderate variations of the control inputs and a minimum dispersion of energy.

Risk Factors for Intraoperative Hypotension in Elderly Patients Undergoing Fast Track Hip Fracture Surgery under Spinal Anesthesia: A Retrospective Observational Study

Objective: Fast-track hip fracture surgery is urgent. Time-limited preoperative optimization increase the risk of perioperative cardiovascular issues, affecting postoperative outcomes. This study aimed to identify risk factors for intraoperative hypotension in elderly patients undergoing fast-track hip fracture surgery with spinal anesthesia. Materials and Methods: This retrospective observational analysis was conducted at a university-based hospital. Medical records from 2018 to 2022 were examined to compare variables associated with intraoperative hypotension. Multivariate logistic regression analysis was used to determine the risk variables for intraoperative hypotension. Results: The incidence of intraoperative hypotension was 50.1%. Significant factors associated with intraoperative hypotension included a history of previous stroke (adjusted odds ratio [OR]: 2.41; 95% confidence interval [CI]: 1.38–4.21, P = 0.002), a preoperative baseline SBP below 100 mmHg (adjusted OR: 2.34; 95% CI: 1.34–4.08, P = 0.003), a preoperative urine output less than 0.5 ml/kg/h (adjusted OR: 2.74; 95% CI: 1.07–6.96, P = 0.034), undergoing an intramedullary nail procedure (adjusted OR: 2.64; 95% CI: 1.85–3.77, P < 0.001). Conversely, protective factors included receiving preoperative blood transfusions (adjusted OR: 0.43; 95% CI: 0.24–0.77, P = 0.004) and receiving a spinal bupivacaine dose of 7.5 mg or above (adjusted OR: 0.59; 95% CI: 0.36–0.95, P = 0.033). Conclusion: Modifiable factors include ensuring adequate preoperative intravascular volume to optimize urine output and blood pressure, and correcting anemia. Prioritizing these measures for at-risk patients can help prevent complicated hospital stays.

A dynamic scale-mixture model of motion in natural scenes.

Some of the most important tasks of visual and motor systems involve estimating the motion of objects and tracking them over time. Such systems evolved to meet the behavioral needs of the organism in its natural environment, and may therefore be adapted to the statistics of motion it is likely to encounter. By tracking the movement of individual points in movies of natural scenes, we begin to identify common properties of natural motion across scenes. As expected, objects in natural scenes move in a persistent fashion, with velocity correlations lasting hundreds of milliseconds. More subtly, but crucially, we find that the observed velocity distributions are heavy-tailed and can be modeled as a Gaussian scale-mixture. Extending this model to the time domain leads to a dynamic scale-mixture model, consisting of a Gaussian process multiplied by a positive scalar quantity with its own independent dynamics. Dynamic scaling of velocity arises naturally as a consequence of changes in object distance from the observer, and may approximate the effects of changes in other parameters governing the motion in a given scene. This modeling and estimation framework has implications for the neurobiology of sensory and motor systems, which need to cope with these fluctuations in scale in order to represent motion efficiently and drive fast and accurate tracking behavior.

Adaptive finite time tracking control for the perturbed nonlinear systems by using backstepping technique and a fast tracking differentiator

Adaptive finite time tracking control for the perturbed nonlinear systems by using backstepping technique and a fast tracking differentiator

Methadone in combination with magnesium, ketamine, lidocaine, and dexmedetomidine improves postoperative outcomes after coronary artery bypass grafting: an observational multicentre study

BackgroundAn optimal pharmacological strategy for fast-track cardiac anesthesia (FTCA) is unclear. This study evaluated the effectiveness and safety of an FTCA program using methadone and non-opioid adjuvant infusions (magnesium, ketamine, lidocaine, and dexmedetomidine) in patients undergoing coronary artery bypass grafting.MethodsThis retrospective, multicenter observational study was conducted across private and public teaching sectors. We studied patients managed by a fast-track protocol or via usual care according to clinician preference. The primary outcome was the total mechanical ventilation time in hours adjusted for hospital, body mass index, category of surgical urgency, cardiopulmonary bypass time and EuroSCORE II. Secondary outcomes included successful extubation within four postoperative hours, postoperative pain scores, postoperative opioid requirements, and the development of postoperative complications.ResultsWe included 87 patients in the fast-track group and 88 patients in the usual care group. Fast-track patients had a 35% reduction in total ventilation hours compared with usual care patients (p = 0.007). Thirty-five (40.2%) fast-track patients were extubated within four hours compared to 10 (11.4%) usual-care patients (odds ratio: 5.2 [95% CI: 2.39–11.08; p < 0.001]). Over 24 h, fast-track patients had less severe pain (p < 0.001) and required less intravenous morphine equivalent (22.00 mg [15.75:32.50] vs. 38.75 mg [20.50:81.75]; p < 0.001). There were no significant differences observed in postoperative complications or length of hospital stay between the groups.ConclusionImplementing an FTCA protocol using methadone, dexmedetomidine, magnesium, ketamine, lignocaine, and remifentanil together with protocolized weaning from a mechanical ventilation protocol is associated with significantly reduced time to tracheal extubation, improved postoperative analgesia, and reduced opioid use without any adverse safety events. A prospective randomized trial is warranted to further investigate the combined effects of these medications in reducing complications and length of stay in FTCA.Trials registrationThe study protocol was registered in the Australian New Zealand Clinical Trials Registry (https://www.anzctr.org.au/ACTRN12623000060640.aspx, retrospectively registered on 17/01/2023).

Intraoperative Dexmedetomidine Use for Enhanced Recovery after Surgery (ERAS) in Cardiac Surgery-Single Center Retrospective Observational Cohort Study.

Background and Objectives: Dexmedetomidine, an alpha-2 agonist, is used as an adjunct to anesthesia in enhanced recovery after surgery (ERAS) programs. One of its advantages is the opioid-sparing effect which can facilitate early extubation and recovery. When the ERAS cardiac society was set in 2017, our facility was already using the ERAS program, in which the "fast-track Anesthesia" was facilitated by the intraoperative infusion of dexmedetomidine. Our objective is to share our experience and investigate the potential impact of intraoperative dexmedetomidine use as a part of the ERAS program on patient outcomes in elective cardiac surgery. Materials and Methods: An observational retrospective cohort study was conducted at a university hospital in Switzerland. The patients who underwent elective cardiac surgery with cardiopulmonary bypass between 1 June 2017 and 31 August 2018 were included in this analysis (n = 327). Regardless of the surgery type, all the patients received a standardized fast-track anesthesia protocol inclusive of dexmedetomidine infusion, reduced opioid dose, and parasternal nerve block. The primary outcome was the postoperative time when the criteria for extubation were met. Three groups were identified: group 0-(extubated in the operating room), group < 6 (extubated in less than 6 h), and group > 6 (extubated in >6 h). The secondary outcomes were adverse events, length of stay in ICU and in hospital, and total hospitalization costs. Results: Dexmedetomidine was well-tolerated, with no significant adverse events reported. Early extubation was performed in 187 patients (57%). Group 3 had a significantly longer length of stay in the ICU (median: 70 h vs. 25 h) and in hospital (17 vs. 12 days), and consequently higher total hospitalization costs (CHF 62,551 vs. 38,433) compared to the net data from the other two groups (p < 0.0001). Conclusions: Our findings suggest that dexmedetomidine can be safely used as part of the opioid-sparing anesthesia protocol in patients undergoing elective cardiac surgery with cardiopulmonary bypass with the potential to facilitate early extubation, shorter ICU and hospital stays, and reduced hospitalization costs.

Fast-Track surgery protocol in perioperative care for gynecological laparoscopy.

This study aimed to compare fast-track surgery (FTS) and traditional perioperative care protocols in laparoscopic gynecological surgeries, assessing their impact on length of stay (LOS), recovery time, and postoperative complications. A case-control retrospective study was conducted at Suzhou Hospital of Integrated Chinese and Western Medicine, involving 167 patients undergoing laparoscopic gynecological surgery from June 2021 to June 2023. Of them, 81 patients underwent surgery based on the FTS protocol (FTS group) and 86 patients received a traditional perioperative management (control group). Patients in both groups underwent gynecologic laparoscopic procedures, including uterine, ovarian and tubal surgeries. Data were collected on general patients' characteristics, including age, BMI, surgery type and time, intestinal recovery and out-of-bed activity time, LOS, pain levels, and postoperative complications. Wilcoxon rank sum test with continuity correction was used to assess the difference in operative characteristics and postoperative pain levels. Fisher's exact test was used to assess the difference in overall frequency of postoperative complications between groups. Patients in the FTS group exhibited faster intestinal recovery, shorter mobilization time, and reduced LOS compared to the control group. Pain levels were significantly lower at one, six and twelve hours post-surgery in the FTS group. Overall, the proportion of postoperative complications was significantly lower in the FTS group than in the control group. Implementing the FTS protocol in laparoscopic gynecological surgeries for benign conditions can reduce LOS, accelerate recovery, and minimize pain without increasing postoperative complications. Further research with more diverse patient populations is warranted to validate these findings.

Research on Control Strategy of PMSG-PWM Power Generation System with Tidal Energy

Aiming at the characteristics of machine-side output instability and the wide-range variation in the tidal energy PMSG-PWM power generation system, we propose a control scheme with a high anti-interference capability applied to the PWM rectifier. The outer voltage loop adopts sliding mode control (SMC) with the variable exponential convergence law based on expanded state observer (ESO). By compensating the perturbation observation value into the sliding mode controller in advance, it improves the robustness and response speed of the system and suppresses the direct current (DC)-side voltage jitter phenomenon. The current inner loop combines model prediction (MP) with direct power control (DPC). By introducing time-delay compensation, it improves the control accuracy, reduces the machine-side harmonic content, and enables the system to maintain unit power factor operation despite external disturbances. Simulation and experiment results show that, under the wide range of PMSG output, the PMSG-PWM power generation system adopting the “ESO_SMC+MDPDC” scheme has a fast dynamic regulation of DC output voltage, obvious vibration suppression effect, low harmonic content of the current on the PMSG side, and fast current tracking speed, which verify the feasibility of applying this system to the field of tidal energy generation.

Fruit fast tracking and recognition of apple picking robot based on improved YOLOv5

AbstractThe article proposes a real‐time apple picking method based on an improved YOLOv5. This method accurately recognizes different apple targets on fruit trees for robots and helps them adjust their position to avoid obstructions during fruit picking. Firstly, the original BottleneckCSP module in the YOLOv5 backbone network is enhanced to extract deeper features from images while maintaining lightweight. Secondly, the ECA module is embedded into the improved backbone network to better extract features of different apple targets. Lastly, the initial anchor frame size of the network is adjusted to avoid recognizing apples in distant planting rows. The results demonstrate that this improved model achieves high accuracy rates and recall rates for recognizing various types of apple picking methods with an average recognition time of 0.025s per image. Compared with other models tested on six types of apple picking methods, including the original YOLOv5 model as well as YOLOv3 and EfficientDet‐D0 algorithms, our improved model shows significant improvements in mAP by 1.95%, 17.6%, and 12.7% respectively. This method provides technical support for robots' picking hands to actively avoid obstructions caused by branches during fruit harvesting, effectively reducing apple loss.

Fast Finite-Time Output Bipartite Tracking of Networked Heterogeneous Robotic Systems with Matrix-Weighted Digraphs

Fast Finite-Time Output Bipartite Tracking of Networked Heterogeneous Robotic Systems with Matrix-Weighted Digraphs

A novel adaptive and modified controller for tracking global peak under partial shading conditions

The present state of Maximum Power Point Tracking (MPPT) techniques face challenges in accurately tracking the Global Maximum Power Point (GMPP) under non-uniform conditions. Swift transitions between operational points, significant transient fluctuations, and imprecise tracking contribute to notable power losses. To address these issues, a novel modified Perturb and Observe (P&O) algorithm is proposed. It mitigates persistent oscillations and enhances tracking accuracy in photovoltaic (PV) systems. Compared to traditional P&O and incremental conductance methods, the proposed algorithm achieves approximately 9.52 % higher average MPPT efficiency. Even under challenging conditions like partial shading, it maintains superior performance with faster tracking and less complexity. The algorithm ensures proper power sharing, achieving an average maximum stabilized power efficiency of 98.48 % with a tracking time below 0.06 s. Notably, it exhibits a 16.5 % increase in power increment across various shading scenarios. Additionally, the proposed method complies with IEC 60904-3 standards, minimizing voltage and current deviations during irradiance dynamics. MATLAB/Simulink and hardware experiments confirm the efficacy of the algorithm, demonstrating improved stability and reduced settling time. The proposed method outperforms existing algorithms, exhibiting the lowest mismatch power loss and achieving a remarkable 15.08 % enhanced power increment. This research contributes to advancing MPPT techniques, offering improved performance and stability in PV systems.

Intergovernmental Relations and implementation of social housing policy in Gauteng Province, South Africa

The aim of this paper is to assess intergovernmental relations in the implementation of social housing policy in Gauteng Province, South Africa. Despite all mechanisms, efforts and resources, the pace of social housing delivery is not at a point where it is measurably satisfactory across all spheres of government. The performance of government shows a lack of institutionalised arrangements, coordination, and alignment in implementing social housing policy. A mixed-methods research approach was implemented. Interviews were conducted with senior managers and research questionnaires were administered with operational staff within the national, provincial government and the three metropolitan municipalities in Gauteng Province which included City of Tshwane, City of Johannesburg and Ekurhuleni, state agencies involved in the delivery of social housing units and municipal social housing institutions, private and non-governmental social housing entities. The data were complemented by documentary content analysis pertaining to the provision of human settlements and social housing. The paper acknowledges the role played by government in implementing social housing policy, however, it proposes a model to fast track social housing delivery in Gauteng Province.

Advanced Control Solutions for DFIG Wind Turbines: From Vector to Predictive Control

This paper investigates advanced control strategies for a doubly-fed induction generator-based wind turbine (DFIG-WT), focusing on vector control and model predictive control (MPC). Initially, it introduces the DFIG-WT structure and general control methods, then explores vector control for effective decoupled power management of active and reactive power. Despite vector control's efficiency, its limitations in handling constraints are highlighted, leading to the adoption of MPC. The study examines MPC's application in current control for three-phase two-level converters, showing its capability for fast tracking and response. Further, it explores MPC's model predictive torque control, demonstrating its proficiency in handling various requirements through a well-designed cost function. Overall, this research emphasizes MPC's adaptability and efficiency in optimizing DFIG-WT performance under varying operational conditions.

Esophageal button battery impactions in children: an analysis of 89 cases

ObjectiveTo analyze the clinical characteristics of esophageal button battery impactions in children and explore safe and effective treatment methods.MethodsThis retrospective cohort study was conducted at a single tertiary care center, Shenzhen Children’s Hospital, encompassing 89 children diagnosed with esophageal button battery impactions between January 2013 and January 2023. To minimize esophageal mucosal corrosion, prompt removal of the button battery with a first-aid fast track rigid esophagoscopy under general anesthesia was performed within thirty minutes of diagnosis. The clinical features and complications were recorded and analyzed.ResultsButton battery as esophageal foreign body was prevalent among children under 3 years old (79.8%), with boys exhibiting a higher incidence rate (56.2%) compared to girls (43.8%), and an average age of 25.8 months. The median duration from ingestion to hospital admission was 3 h (range: 0.5 h to 3 months). Common symptoms included vomiting and dysphagia, with early stage vomiting of brown foamy secretions being a characteristic presentation of esophageal button battery impactions. The majority (77.5%) of batteries were lodged in the upper esophagus. The larger batteries were verified to be more prone to complications. All 89 cases exhibited varying degrees of esophageal mucosal erosion, with 31 cases (34.8%) experiencing severe complications, including esophageal stenosis in 11 cases (35.5%), esophageal perforation in 9 cases (29%) with 4 cases of tracheoesophageal fistula, vocal cord paralysis in 6 cases (19.4%), hemorrhage in 2 cases (6.5%), mediastinitis in 2 cases (6.5%), and periesophageal abscess in 1 case (3.2%). Despite the severity of these complications, none of the patients died after emergency surgery.ConclusionEsophageal button battery impactions can lead to significant damage to the esophageal mucosa due to its strong corrosiveness. Prompt action is crucial to mitigate the risk of complications. For the first time, we implement a first-aid fast track surgical intervention following diagnosis is imperative to minimize the incidence of adverse outcomes.

Incidence of Venous Thromboembolism after Primary Total Hip Arthroplasty with Mechanical Prophylaxis in Hong Kong Chinese.

The incidence of deep vein thrombosis (DVT) following total hip arthroplasty (THA) without chemoprophylaxis could be as high as 50% in Caucasians. However, according to several subsequent studies, the incidence of venous thromboembolic events (VTE) in Asians was much lower. The routine use of chemoprophylaxis, which could potentially cause increased bleeding, infection, and wound complications, has been questioned in low-incidence populations. The objective of this study is to determine the incidence of VTE after primary THA without chemoprophylaxis in an Asian population using a fast-track rehabilitation protocol and to verify the safety profile for use of 'mechanical prophylaxis alone' in patients with standard risk of VTE. This is a retrospective cohort study of 542 Hong Kong Chinese patients who underwent primary THA without chemoprophylaxis. All patients received intermittent pneumatic compression and graduated compression stockings as mechanical prophylaxis. Multimodal pain management was applied in order to facilitate early mobilisation. Routine duplex ultrasonography was performed between the fourth and seventh postoperative day for detection of proximal DVT. All patients were Chinese (mean age, 63.0±11.9 years). Six patients developed proximal DVT (incidence rate, 1.1%). None of the patients had symptomatic or fatal pulmonary embolism. The incidence of VTE after primary THA without chemical prophylaxis can be low in Asian populations when following a fast-track rehabilitation protocol. Mechanical prophylaxis alone can be regarded as a reasonably safe practice in terms of a balanced benefit-to-risk ratio for Asian patients with standard risk of VTE.

Electric Vehicles Charging Services Perspectives and Challenges

Abstract The year 2023 marked another breakthrough in electromobility. Customers accept electric powertrain; sales of battery electric vehicles and plug-in hybrid vehicles are booming and public charging infrastructure follows the similar pace. However, the leading European independent charging stations operators, despite the significant public funding utilized for financing their expansion activities are still experiencing losses, as a result of their operation. Generally, current research work in area of electric vehicle charging is rather focused on specific and rather technical aspects of charging infrastructure operations, like optimization of charger locations, connection to energy networks and operational excellence. Very few authors are focusing on core business essentials of charging infrastructure operation, in particular on sustainability of their operations. Within this paper author conducted financial analyses of selected charging infrastructure operator in Europe, compared the conclusions with its peers. Furthermore, this paper has an ambition to perform synthesis (after thorough review and analysis of relevant information sources) of different aspects of e-mobility ecosystem to conclude innovative recommendations. The main result of this paper is the recommendation for the charging infrastructure operators to adjust their strategies and respective business models in terms to make a move towards slow charging world, by building and operating Vehicle to Grid equipped infrastructure as a supplement to fast chargers’ network. Sooner charging infrastructure operators will develop their competences in Vehicle to Grid world the better, mainly for two reasons. Firstly, it is very probable that Vehicle to Grid market will jump on fast track very soon. Not only from technology point of view, but also from services provided/expected from customers. Secondly, in Vehicle to Grid connected ecosystem lays needed tens or even hundreds of millions EUR opportunities which will be waiting for Electric Vehicle´s owners and any subjects which can facilitate and instrument interconnection between energy network’s needs – auxiliary services, storage of electricity, integration of renewable energy sources and traction batteries of Electric Vehicles.

Application of the ERAS guidelines in pediatric urological surgery: a systematic review.

Consensus for Enhanced Recovery After Surgery (ERAS) in pediatrics has been achieved in neonatal intestinal surgery, yet it is not widely utilized in pediatric urology. We investigated the application of ERAS guidelines in pediatric urology, and determined its effects given the available level of evidence supporting the ERAS protocol in children. A systematic literature review including series providing adoption of fast-track recovery protocols for pediatric urology procedures was carried out. Main outcome measures were study characteristics, adherence to the 19 ERAS items, complication rates and length of hospital stay. Sub-group analysis by surgery type (hypospadias versus major surgery) was performed. Nine series with data from 1272 surgical pediatric cases were included. An enhanced recovery pathway was applied in 67.3% of the reports. Two series included patients undergoing hypospadias repair and ERAS items were insufficiently reported. Studies including children undergoing major procedures mentioned a median of 15 ERAS items, yet applied a median of 11 items. Median compliance rate was 88.9% (range 50-100). More ERAS guideline items were reported (applied or mentioned) in the most recently published studies. There is limited reporting and use of the ERAS guidelines in urologic surgery particularly in hypospadias repair; whilst in major surgery in children, adherence and compliance rates vary widely. In more recent series there was an increase in ERAS items that have been mentioned and applied. Future research is needed to identify barriers and to overcome them in order to fully adopt and benefit from the ERAS pathway.

Neural Network Control of Underactuated Surface Vehicles With Prescribed Trajectory Tracking Performance.

This article is concerned with the fast and accurate trajectory tracking control problem for a sort of underactuated surface vehicle under model uncertainties and environmental disturbances. A novel neural networks (NNs)-based prescribed performance control strategy is proposed to solve the problem. In the control design, a new type of performance function is constructed which provides a way to predefine the settling time and accuracy, straightforward. Then, a pair of barrier functions are employed to combat not only the position error but also the virtual control input. This evades the possible singularity or discontinuity of the control solution. Next, an initialization technique is exploited, removing the requirement for the initial condition of the control system. Finally, two NNs are employed to deal with the unknown ship nonlinearities. The performance analysis not only demonstrates the effectiveness of the proposed approach but also reveals its robustness against disturbances and unknown reference trajectory derivatives. There is, thus, no need to acquire such knowledge or employ specialized tools to handle disturbances. The theoretical findings are illustrated by a simulation study.

Primary health clinicians' attitudes towards liquid biopsy as diagnostic test for advanced lung cancer.

e13525 Background: Lung cancer remains a leading cause of cancer mortality globally. In New Zealand (NZ), lung cancer disproportionately affects our indigenous Māori population with both incidence and mortality being three times higher than NZ-Europeans. Incidence of endothelial growth factor receptor mutated lung cancer is two to three times higher in Māori, Pacific, and Asian people compared to NZ-Europeans. Diagnostic delays arise from tissue biopsy difficulties and a lack of standardization in molecular testing. These delays could potentially be reduced if testing was augmented by liquid biopsy (LB) at the outset of diagnosis. LB could be more accessible, faster, and lower cost compared to tissue biopsy. We aimed to evaluate primary health clinicians’ (PHCs’) attitudes towards use of LB for molecular testing and lung cancer diagnosis. Methods: A NZ national survey was conducted of PHCs. The online survey was distributed through PHC bulletins, newsletters, and social media. It was open to circulation between November 2023 to January 2024 and consenting clinicians completed this via REDCap. Descriptive analysis was performed and reported in aggregate. Results: Seventy-two PHCs responded with 58 complete responses. Respondents were 78% urban and 25% worked in practices of very low-cost access. Current diagnostic challenges reported include limited PHC appointments, poor access to imaging, and limited access to specialist care. Fast track diagnostic pathway to specialist care existed for 55% of respondents. 92% were initially unaware of LB for molecular testing. 79% were not comfortable with pre-test genetic counselling associated for this. Concerns raised about LB included subsequent patient access to secondary care and establishing a culturally appropriate pathway particularly for Māori. Some rural PHCs highlighted the potential of LB to complement existing procedures. Provided there were adequate training and funding for LB, 72% of respondents would be comfortable requesting LB and associated counselling. The most preferred types of training were PHC focused articles (70%), online clinical pathways (68%), webinar (61%), online course (51%), and in-person presentation (46%). Conclusions: Most PHCs were not familiar with LB for molecular testing but 72% supported these tests to be incorporated into current pathways. There is a need to develop culturally safe pathways with sufficient training and funding, in order to reduce health inequities.

Specific Features of Diagnostic and Treatment Tactics in Patients with Crushed Abdominal Hernias Without Resection of a Hollow Organ.

The purpose of the work is to analyze the results of the use of optimized diagnostic and therapeutic tactics in patients with strangulated abdominal hernias without resection of the hollow organ. Materials and methods: The work is based on the analysis of the results of surgical treatment of 665 patients with strangulated abdominal hernias without resection of the hollow organ, who were divided into 2 groups depending on the features of the diagnostic and treatment tactics. Unlike the patients of group 1, the following diagnostic tactics were used in group 2: substantiated laparoscopic diagnosis of abdominal organs; mandatory biochemical assessment of hernia water; mandatory intraoperative instrumental assessment of the state of the strangulated organ; expansion of indications for the use of laparoscopic interventions and components of the comprehensive Fast track program; substantiated complex prevention of malignancy. The clinical diagnostic algorithm included laboratory, instrumental and biochemical research methods. Results: The use of priority diagnostic and therapeutic tactics in the patients of group 2 allowed to increase the number of laparoscopic hernioplasty by 49.34%, the number of allohernioplasty by 18.62%, among which the "Sublay" technique was preferred for strangulated ventral hernias. This was accompanied by a decrease in the pain syndrome on the VAS scale during the four days of observation, both during coughing and at rest, and amounted to only 2.21 ± 0.29 points on the fourth day when at rest. In addition, and after 12 months, the patients of group 2 observed a better recovery according to the SF-36 questionnaire, which amounted to 76.77±6.63 points for the assessment of the general state of health, 70.81±5.86 points for the assessment of physical functioning, 68.88±5.37 points for the assessment of role functioning due to physical condition, 68.03±5.92 points for the assessment of role functioning due to emotional state, and social activity was characterized by 72.82±5.52 points. Conclusions: 1. The proposed diagnostic and treatment tactics in the patients of group 2 with strangulated abdominal hernias without resection of a hollow organ, in contrast to patients in group 1, made it possible to increase the number of laparoscopic operations to 227 (66.37%) in contrast to 55 (17.03%) in the first group, which was accompanied by a decrease in pain syndrome on the VAS scale on the fourth day when coughing from 4.35 ± 0.38 points to 2.97 ± 0.43 points. 2. The expansion of indications for the use of laparoscopic operations in patients of group 2, in contrast to patients of group 1, led to a decrease in the postoperative complications by 10.48% and the postoperative mortality by 2.29% and was characterized by better postoperative rehabilitation according to the assessment of the patients' condition after 12 months according to the SF-36 questionnaire..