Partial Failure Research Articles

Centrifuge modeling of unreinforced and multi-row stabilizing piles reinforced landslides subjected to reservoir water level fluctuation

With the construction of the Three Gorges Reservoir dam, frequent reservoir landslide events have been recorded. In recent years, multi-row stabilizing piles (MRSPs) have been used to stabilize massive reservoir landslides in China. In this study, two centrifuge model tests were carried out to study the unreinforced and MRSP-reinforced slopes subjected to reservoir water level (RWL) operation, using the Taping landslide as a prototype. The results indicate that the RWL rising can provide lateral support within the submerged zone and then produce the inward seepage force, eventually strengthening the slope stability. However, a rapid RWL drawdown may induce outward seepage forces and a sudden debuttressing effect, consequently reducing the effective soil normal stress and triggering partial pre-failure within the RWL fluctuation zone. Furthermore, partial deformation and subsequent soil structure damage generate excess pore water pressures, ultimately leading to the overall failure of the reservoir landslide. This study also reveals that a rapid increase in the downslope driving force due to RWL drawdown significantly intensifies the lateral earth pressures exerted on the MRSPs. Conversely, the MRSPs possess a considerable reinforcement effect on the reservoir landslide, transforming the overall failure into a partial deformation and failure situated above and in front of the MRSPs. The mechanical transfer behavior observed in the MRSPs demonstrates a progressive alteration in relation to RWL fluctuations. As the RWL rises, the mechanical states among MRSPs exhibit a growing imbalance. The shear force transfer factor (i.e. the ratio of shear forces on pile of the nth row to that of the first row) increases significantly with the RWL drawdown. This indicates that the mechanical states among MRSPs tend toward an enhanced equilibrium. The insights gained from this study contribute to a more comprehensive understanding of the failure mechanisms of reservoir landslides and the mechanical behavior of MRSPs in reservoir banks.

The resilience evaluation of unmanned autonomous swarm with informed agents under partial failure

The resilience analysis of unmanned autonomous swarms under various disturbances provides valuable insights for the design of unmanned swarms and mission planning. Current studies usually focus on the complete failure of the individual in the swarm where the individual and/or its connections are removed and/or rewired. In this paper, we study the issue of swarm resilience with some agents suffering partial failure. Three motion models and their corresponding resilience processes are proposed respectively given three partial failure modes. Furthermore, an improved resilience evaluation metric considering the absolute time scale and minimum mission performance requirement is proposed. The collective behavior and resilience process under different partial failures and strategies are studied through simulations. The results reveal the swarm resilience decreases as the swarm size increases, and the swarm resilience is sensitive to degree and location failure strategy.

Job displacement and reallocation failure. Evidence from climate shocks in Morocco

Abstract We investigate the impact of severe drought shocks in Morocco’s agricultural sector. Using a staggered difference-in-differences design, we estimate that climatic shocks resulted in a job displacement of approximately 6.5 percentage points for workers exposed to severe drought events. Additionally, we observe that, overall, approximately 39 per cent of these workers remained unemployed, leading to a partial reallocation failure. These effects are significant only for severe and extreme shocks, persist for at least 5 years, and are more pronounced among informal and female workers.

Virtual Surgical Planning Facilitates Surgical Resection in Mandibular Osteoradionecrosis and Optimize Reconstructive Outcomes

Background: Mandibular osteoradionecrosis (ORN) is a devastating complication of radiotherapy for oropharyngeal malignancy. Despite advancements in ORN treatment, risk of ORN recurrence remains high following surgical resection. Virtual surgical planning (VSP) for ORN treatment is an evolving application that may not only inform bony reconstruction but also therapeutic surgical margins, which remain inconclusively defined in the literature. Methods: A retrospective review was performed of 25 cases in which patients underwent VSP-guided resection of mandibular ORN followed by immediate free fibula flap reconstruction. Surgical margins of 1-cm from radiologically evident disease were taken. VSP accuracy was quantified by comparing measured anatomic parameters between the virtually planned outcomes and the final outcomes on postoperative imaging. Statistical analyses were performed to assess associations between preoperative factors and postoperative complications including ORN recurrence. Results: The mandibular body was most frequently affected by ORN in this series of patients. Among risk factors, only the presence of a preoperative orocutaneous fistula was predictive of a complication, specifically partial flap failure (β = 1.41; P = .013). Intended anatomic parameters were achieved with the exception of the intergonial distance (x difference = 0.53 cm; P = .03). Finally, there were no cases of ORN recurrence after a mean follow-up of 27.4 months. Conclusions: VSP of free fibula flaps for mandibular reconstruction following ORN is a valid tool for effecting accurate anatomical outcomes. Furthermore, we demonstrate that a 1-cm margin around radiographically evident ORN may effectively implement a curative outcome free from relapse.

Systematic review of the free thoracodorsal artery perforator flap for head and neck reconstruction

BackgroundThe thoracodorsal artery perforator (TDAP) flap has gained interest as a option for reconstruction of head and neck defects while minimizing donor site morbidity as compared to traditional workhorse flaps. The primary aim of this systematic review is to assess the postoperative outcomes and efficacy of this flap. MethodsSeveral databases were screened for relevant citations. The quality of studies and risk of bias were evaluated using the MINORS scoring system. ResultsTwenty articles containing 168 patients undergoing at least one TDAP flap reconstruction met the inclusion criteria. There were no incidences of total flap failure and only 10 incidences of partial flap failure (5.95 %). Flap complications and donor site morbidity was low. The average MINORS score of the studies suggested a moderately high amount of bias. ConclusionsBased on limited quality evidence, this review suggests that TDAP flap is a safe and feasible option for head and neck reconstruction with comparable success rates as other commonly used flaps, with low complication rate and donor site morbidity. Further large-scale studies are warranted.

Seismic vulnerability assessment of historical minarets in Cairo

IntroductionMasonry minarets in Old Cairo are highly susceptible to earthquake damage, particularly those not designed or updated to withstand seismic loads. Therefore, regular monitoring is necessary to ensure their safety and detect any deterioration or reduction in seismic performance. The direct loss of a minaret can lead to the collapse or severe damage to the structure itself. The cascading impacts of partial or complete minaret failure can have significant consequences for the immediate vicinity and the broader community. By studying the effects of earthquakes on minarets and developing mitigation strategies, countries can take proactive measures to protect these structures and ensure the safety of people.ObjectiveThis study focuses on a specific type of Islamic architecture: the historic minarets in Cairo. The research aims to evaluate the seismic vulnerability of eight cultural heritage minarets in Cairo, identifying the parameters influencing their seismic behaviour and susceptibility to earthquake damage.MethodsThe research utilizes empirical seismic vulnerability methods and ambient vibration measurements on eight minarets. An empirical approach compatible with the nature and style of the minarets is employed to evaluate their vulnerability using index values and curves. The method's validity is assessed, and areas of conformity and limitations are identified. Ambient vibration tests (AVTs) are also conducted using a temporary seismic network installed at various heights inside each minaret to determine their dynamic characteristics.ResultsThe seismic vulnerability Index (I_V) is calculated for the selected minarets based on the state of each vulnerability parameter. The contribution of each parameter to the final I_V values of the minarets are presented. Vulnerability curves are developed for each minaret, interpreting the conventional vulnerability indexes in terms of mean damage grades for seismic events with varying intensity on the EMS-98 scale. These mean damage grades can also indicate the expected damage levels of structural and non-structural minaret elements for events with different seismic intensity levels. AVTs are conducted at various heights on the selected minarets, and the dynamic characteristics are extracted from the recorded data. Variations in these characteristics are considered significant for structural health monitoring analysis. The peak-picking method is employed to directly extract each minaret's natural frequencies and mode shapes, as changes in dynamic characteristics are relevant to health monitoring analyses.ConclusionsThe recent study examined the seismic vulnerability assessment of eight masonry minarets in the historic Old Cairo district. The assessment revealed vulnerability index values ranging from 10.3 to 26.1, indicating a concerning susceptibility to seismic events among these structures. Vulnerability curves were constructed for each minaret, visually representing potential damage scenarios across different levels of the EMS-98 intensity scale. These outcomes are significant as they facilitate prioritizing interventions to safeguard the most vulnerable minarets. Additionally, a novel empirical period equation was introduced to estimate the fundamental period of minarets in Old Cairo based on their heights. The equation was validated against field measurements and data from the literature. The study is limited by its focus on a specific category of minarets, specifically the historical masonry minarets in Old Cairo. Furthermore, limitations arise from the need for detailed finite element models to capture these minarets' dynamic responses accurately. Therefore, ongoing research involves the development of detailed finite element models and calibrating fundamental periods for the selected minarets. The anticipated results hold the potential to enhance our understanding of the structural dynamics of historical minarets, ultimately guiding the formulation of tailored seismic retrofitting and preservation strategies. These strategies, aimed at preserving these cherished cultural heritage assets, represent our collective commitment to ensure the endurance of these timeless landmarks for future generations.

Parametric studies and compressive performance of GH4169/K465 Kagome lattice structure prepared by selective laser melting

This paper is proposed a sufficient strategy to enhance the Kagome lattice structure by introducing sphere connections at the joints of the rods. Three types of lattice structures, namely single-cell Kagome, sandwich monocyte, and multi-layer sandwich GH4169/K465, were fabricated through the selective laser melting method. Experimental results demonstrated that the load peak value of the lattice structure increased gradually with variations in rod diameter and angle. When the rod diameter is 2 mm and the angle is 50°, the comprehensive performance is relatively excellent. Both the single-cell Kagome and sandwich monocyte structures exhibited a secondary load peak curve for the load versus displacement curve.The primary failure mode of the spherical connections Kagome structure is member fracture. For sandwich cell structures, when the rod diameter is 1.1 mm, the elastic modulus, yield strength and energy absorption of SRK are 412 MPa, 17.02 MPa and 8.05 MJ/mm3, respectively. When the rod diameter is increased to 1.7 mm, the properties of SRK are 561 MPa, 84.32 MPa and 35.49 MJ/mm3, respectively. The properties of SRK gradually increase with the increase of rod diameter. the elastic modulus, yield strength, and energy absorption of strut-reinforced Kagome with varying rod diameters surpass those of both the Kagome and spherical connections Kagome structures. The failure mode in strut-reinforced Kagome structures is primarily due to rod buckling. In the compressive stress-strain curve of the multi-layer sandwich structure,when the deformation amount is 0.2, SRK has a higher compressive strength than Kagome and SCK structure, which can reach about 350 MPa, while Kagome and SCK are lower than 200 MPa. demonstrated a gradual increasing trend in stress with increasing strain. In addition, the mechanical properties of the Kagome lattice structure are enhanced due to partial structural failure, with fracture occurring in certain members.

Research on Fault-tolerant Control Allocation Technology for X-rudder UUV

X-rudder UUV is a typical redundant control system with high reliability and high control difficulty. This article researches the reconfigurable control allocation technology of X-rudder UUV control, analyzes and sorts out typical fault types of X-rudder UUV, and designs a reconfigurable control allocation algorithm without changing the high-level control law. In the case of partial failure of the rudder surface, the remaining rudder surface is used to complete the movement of UUV, improving the robustness of UUV to faults and damage. The effectiveness of the proposed fault-tolerant control allocation method is verified by simulation.

The superstructure behavior assessment of the railway bridge with truss element damage

The analysis of railway bridge accidents shows that at the present stage, the number of accidents and mechanical superstructures damage is associated with vehicle impacts. Bridge design standards recommend to check bridge structures for survivability, operational control standards do not cover such issues. To superstructure behavior assessment of a single-track railway bridge with truss element damage, a numerical study of changes in the stress-strain state of bridge superstructure was carried out within the framework of the dissertation research «Assessment of the operational reliability of metal spans with damage and methods of their monitoring». The object of the research is a typical superstructure with an estimated length of 66 m in the condition of complete or partial failure of various truss elements due to mechanical damage. As a result of the research, the nature of the redistribution of the stress-strain state of the superstructure was revealed. It is determined that the spatial redistribution of the stress-strain state occurs along the path of increasing stresses in the lattice elements of the parallel truss and longitudinal links. According to the control of allowable stresses and deflections, the survivability of the superstructure is maintained while 70 % of the single truss element elimination is reached. The elements for which mechanical damage is most dangerous have been identified.

Instability Risk Assessment for Deep Excavation of Soil–Rock Combinations Containing Groundwater

Dynamic risk assessment is a pivotal tool for enhancing construction safety and minimizing the potential for partial failure during deep and extensive excavation projects. To enhance the efficacy of dynamic risk assessment in deep excavation, this study introduces a novel risk assessment model designed to evaluate instability risk in extensive excavations. It comprises a risk factor selection model for identifying the most pertinent factors and an instability risk assessment model for gauging the extent of instability risk throughout the construction process. Then, the model was deployed in the construction of Anshan Road Station of the Qingdao Metro. To pinpoint the factors with the most pronounced impact on excavation instability, a risk factor selection model was employed, yielding a comprehensive risk evaluation index system. For real-time assessment of risk, the monitoring data were used as the primary source of evidence. A comprehensive comparative analysis involving actual data and predictions from conventional RBF and back propagation neural networks was performed. The outcome of this analysis underscored the superior accuracy and predictive capabilities of the assessment model. The instability risk assessment model offers the ability to dynamically evaluate the instability risk associated with extensive excavations featuring a combination of soil and rock. It can serve as a valuable methodological tool, furnishing essential support for the systematic prevention and mitigation of excavation instability disasters.

Large Deletion in the Factor VIII Gene Is a Predictor of Immune Tolerance Induction Failure in People with Severe and Moderately-Severe Hemophilia a and High-Responding Inhibitors

Introduction Immune tolerance induction (ITI) is a therapeutic approach to eradicate inhibitors against factor VIII (FVIII) in people with inherited hemophilia A (PwHA). The success of ITI is highly variable, ranging from 60% to 80% across studies. Beyond inhibitor titers, other predictors of ITI outcome are unknown. Deleterious variants in FVIII gene ( F8) are well established risk factors for alloantibodies development in PwHA, although few studies have investigated the role of F8 variants on ITI outcome.Therefore we aimed to comprehensively analyze the association of F8 pathogenic variants on ITI outcome in severe PwHA with high-responding inhibitors. Methods We included severe (FVIII < 1 international units [IU]/dL) and moderately-severe (FVIII 1-2 IU/dL) unrelated PwHA and high-responding inhibitors who completed ITI from a large, admixed population of two well-characterized cohorts - the HEMFIL and the Brazilian Immune Tolerance (BrazIT) studies. We collected socio-demographic, clinical and laboratory data. ITI outcomes were defined according to previous definitions as failure, partial and total successes. Inversions of intron 1 and 22 (Inv22) were detected by polymerase chain reaction (PCR), and high-throughput sequencing approaches were used to unveil the additional F8 variants. The association between F8 pathogenic variants and ITI outcome was adjusted for inhibitor levels. To investigate whether F8 variants associated with inhibitor development were also related to ITI outcome, variants were categorized as “high-risk”, “intermediate-risk”, and “low-risk” categories. These categories for inhibitor development were then compared with the outcomes of ITI (total and partial successes and failure) using data from this study. Results We included158 PwHA, median age 6.6 years at ITI start, 90.5% were severe (Table 1). Inv22 was the most prevalent variant (55.1%) (Table 1). In comparison with Inv22-1, the risk of ITI failure was about 9 times higher (adjusted odds ratio [adjOR] 9.29; 95% confidence interval [95% CI] 1.95-53.70) among carriers of large deletions (Table 2). Conversely, Inv22-2 was associated with favorable ITI outcome in a univariate analysis (OR 0.15; 0.01-0.84), and after adjustment (adjOR 0.32; 95% CI 0.02-1.96) (Table 2). F8 deleterious variants sorted as high-risk and intermediate-risk according to a previously published classification on inhibitor development were associated with failure and successful outcomes, respectively. Conclusion Our study showed that F8 large deletions are independent predictors of ITI failure, and Inv22-2 is likely to be a predictor of successful ITI. We found a correspondence between variants classified as high-risk and intermediate-risk to inhibitor development with ITI failure and success, respectively. We suggest that F8 genotyping should be considered before indication of ITI, as ITI outcome can vary according to individual variant burden.

Autophagy core protein BECN1 is vital for spermatogenesis and male fertility in mice†.

Mammalian spermatogenesis is a highly complex multi-step biological process, and autophagy has been demonstrated to be involved in the process of spermatogenesis. Beclin-1/BECN1, a core autophagy factor, plays a critical role in many biological processes and diseases. However, its function in spermatogenesis remains largely unclear. In the present study, germ cell-specific Beclin 1 (Becn1) knockout mice were generated and were conducted to determine the role of Becn1 in spermatogenesis and fertility of mice. Results indicate that Becn1 deficiency leads to reduced sperm motility and quantity, partial failure of spermiation, actin network disruption, excessive residual cytoplasm, acrosome malformation, and aberrant mitochondrial accumulation of sperm, ultimately resulting in reduced fertility in male mice. Furthermore, inhibition of autophagy was observed in the testes of germ cell-specific Becn1 knockout mice, which may contribute to impaired spermiogenesis and reduced fertility. Collectively, our results reveal that Becn1 is essential for fertility and spermiogenesis in mice.

Microstructure characteristics and mechanical performances of the dissimilar welded joint of Q&P980 and Q&P1180 steels subjected to the paint-baking heat treatment

The dissimilar welded joints of Q&P980 and Q&P1180 steels with and without paint-baking heat treatment were investigated and their microstructures were characterized using confocal laser scanning microscope (CLSM), electron backscatter diffraction (EBSD), scanning electron microscope (SEM) and transmission electron microscope (TEM) in order to understand the change of mechanical performances of the welded joints. The two Q&P steels have slight differences in compositions, but the obviously varying fraction of tempered martensite and thus the difference in the tensile strength. Prior to paint-baking heat treatment, the dissimilar welds exhibit a lower martensite fraction of the intercritical heat-affected zone (ICHAZ) in the Q&P980 side compared to the Q&P1180 side, and it is not affected by the paint-baking treatment. After the treatment, the occurrence of carbides and the coarsening of martensite in the whole welded joint, as well as the decomposition of retained austenite in the ICHAZ, are observed. The paint-baking treatment also causes the decreasing microhardness values of all regions. Especially, the significantly decreasing microhardness in the fusion zone compared to other heat-affected zones results in a partial pull-out failure mode compared to a full pull-out failure mode without paint-baking treatment. The change in failure mode and the softening of the martensitic matrix are found to be responsible for the increase in the peak load and the energy absorption of the dissimilar welded joint of Q&P980 and Q&P1180 steels.

Effects of Paint Baking Heat Treatments on Mechanical Properties and Microstructure of Resistance Spot-Welded A5022-O and A6014-T4 Alloys

This study presents information on the behavior of paint baking (PB) after resistance spot welding of the 5- and 6xxx series aluminum alloys. The weld parameters are optimized, and the weld specimens are baked three times for 20 min at 180 °C to simulate the heat treatments required for paint baking. The mechanical properties of the samples were characterized by using the lap shear test, micro/nanoindentation hardness, and fatigue test. As the mechanical properties of the weld are affected by the characteristics of the heat-affected zone and those of the fusion zone, the microstructure of the cross-sections was also analyzed through optical and electron microscopy. The investigation of the 6xxx series welds showed that the post-processing heat treatment decreased both the strength and the toughness of the weld, which resulted from the reduced hardness of the microstructure. Additionally, the lap shear test indicated that the failure mode for the 6xxx series changed from nugget failure to partial nugget failure after the paint baking process. However, the mechanical properties of the 5xxx welds were not affected as much as the 6xxx series during baking heat treatment. The fatigue test for the 6xxx series showed a different tendency from the lap shear test. Its fatigue properties improved due to an increased elastic modulus after the heat treatment.

Primary Failure of Eruption: A Diagnosis of Exclusion

Primary failure of eruption is a rare condition, which results in partial or complete failure of a tooth or several teeth to erupt. The postulated cellular process is a malfunction in the eruption mechanism, which fails to completely drive the tooth along its eruption axis. The aetiology is genetic, with a specific link to a mutation in the parathyroid hormone 1 receptor gene, hence a familial pattern of inheritance may be observed. Diagnosis and treatment can be challenging, often necessitating an interdisciplinary approach. CPD/Clinical Relevance: Knowledge of the features of primary failure of eruption is useful for clinicians.

A Two-Stage Distributed Task Assignment Algorithm Based on Contract Net Protocol for Multi-UAV Cooperative Reconnaissance Task Reassignment in Dynamic Environments.

Multi-UAV systems have been widely used in reconnaissance, disaster relief, communication, and other fields. However, many dynamic events can cause a partial failure of the original mission during the mission execution process, in which case task reassignment should be carried out. How to reassign resources and tasks in multi-dynamic, multi-target, and multi-constraint events becomes a core issue in the enhancement of combat efficiency. This paper establishes a model of multi-UAV cooperative reconnaissance task reassignment that comprehensively considers various dynamic factors such as UAV performance differences, size of target areas, and time window constraints. Then, a two-stage distributed task assignment algorithm (TS-DTA) is presented to achieve multi-task reassignment in dynamic environments. Finally, this paper verifies the effectiveness of the TS-DTA algorithm through simulation experiments and analyzes its performance through comparative experiments. The experimental results show that the TS-DTA algorithm can efficiently solve the task reassignment problem in dynamic environments while effectively reducing the communication burden of UAV formations.

Laboratory studies of the impact of non-breaking waves on a horizontal emerged deck

The horizontal elements of maritime structures are susceptible to both wave impact and resulting vibrations. These vibrations can lead to a partial or complete failure of structures and require detailed investigations. To address this issue, laboratory experiments were conducted in a wave flume. The aim of this study was to investigate the problem of standing wave impact underneath a horizontal deck. The main focus was on the effect of the wave-induced vertical forces on the global response of the structure. The physical model of the deck was installed above a still water level in front of a vertical barrier. The model was supported by a system of strings and springs. The mechanical system had one degree of freedom corresponding to a small rotational displacement around rear deck edge. Among other physical parameters, the impact pressure generated under the structure due to wave impact was measured. The high sampling frequency of the data acquisition system allowed to capture momentary slamming pressure. The systems of accelerometers and displacement gauges were installed to measure induced vibrations. Thorough analysis of the influence of wave parameters and the deck clearance on the structure response was performed based on the measurements. The rapid slamming force increase, recorded at the moment of impact is not revealed in the dynamic response of the plate.

Finite integral transform solution of unsteady heat conduction applied to thermal plug and abandonment of oil wells

The end of the production phase of an offshore oil well represents a remarkable shift in field operations from extraction to plug and abandonment. The international normative requirements for permanent well plugging demand a series of technical maneuvers to avoid structural failures and the formation of leakage paths during or after the sealing process. The current closure technique requires a complete or partial removal of the production column before the borehole may be plugged with Portland cement. However, the tube removal process frequently results in an increase in the involved time and costs. Hence, the current research was aimed at investigating the prototype approach of Thermal Plug and Abandonment of wells by applying a thermite heat emitter device to melt the production column's steel. Here, the Finite Integral Transform analytical method was computationally implemented through an inhouse code to calculate the resultant transient temperature fields at the multilayered medium. The results were compared to a Finite Volume Method numerical solution to enhance the study’s reliability. The research outcomes provided insight that even in the event of a partial thermite reaction failure and a highly nonuniform heat pattern, the resultant molten azimuthal length of the production column may still allow enough room for cement flow. It was estimated through the temperatures achieved that the heat emitter is capable of melting at least nearly three-quarters of the production tube’s azimuthal length, thus eliminating the need for its removal and significantly reducing the sealing process operational costs.

Design of UDE-based finite-time fault-tolerant control for DP vessels with complex disturbances and input constraints

This paper presents a novel uncertainty and disturbance estimator (UDE) – based finite-time fault-tolerant control scheme, applied to the controller design of dynamic positioning (DP) vessels with environmental disturbances, model uncertainty, input saturation, and thruster failures. The proposed method employs a non-singular terminal sliding surface to achieve finite-time stability based on the vessel's position and velocity errors. A UDE is to estimate environmental disturbances and model uncertainties. The auxiliary dynamic system (ADS) and smooth switching function are adopted to compensate for input constraints and avoid singularity caused by ADS. Further, a proposed fault observer is to estimate the thruster's fault state. In partial thruster failure, the utilization of the remaining execution ability of the failed thrusters to achieve vessel control objectives. Theoretical and simulation results show that the proposed method has a fast response, high control accuracy, strong disturbance resistance, and fault tolerance, making it superior to recent and classical trajectory tracking control.

Transvenous lead extraction in children with bidirectional rotational dissection sheaths.

Due to the limited longevity of endovascular leads, children require thoughtful lifetime lead management strategies including conservation of access vessel patency. Consequently, there is an increasing interest in transvenous lead extraction (TLE) in children, however, data on TLE and the use of powered mechanical dissection sheaths is limited. We performed a retrospective cohort study analyzing all children <18 years that underwent TLE in our institution from 2015 to 2022. Procedural complexity, results and complications were defined as recommended by recent consensus statements. Twenty-eight children [median age 12.8 (interquartile range 11.3-14.6) years] were included. Forty-one leads were extracted [median dwell time 85 (interquartile range 52-102) months]. Extractions of 31 leads (76%) in 22 patients (79%) were complex, requiring advanced extraction tools including powered bidirectional rotational dissection sheaths in 14 children. There were no major complications. Complete procedural success was achieved in 18 (64%) and clinical success in 27 patients (96%), respectively. Procedural success and complexity varied between lead types. The Medtronic SelectSecure™ lead was associated with increased odds of extraction by simple traction (p = 0.006) and complete procedural success (p < 0.001) while the Boston Scientific Fineline™ II lead family had increased odds of partial procedural failure (p = 0.017). TLE with the use of mechanical powered rotational dissection sheaths is feasible and safe in pediatric patients. In light of rare complications and excellent overall clinical success, TLE should be considered an important cornerstone in lifetime lead management in children. Particular lead types might be more challenging and less successful to extract.