2,522 results match your criteria time pneumatic


Differential Soft Sensor-Based Measurement of Interactive Force and Assistive Torque for a Robotic Hip Exoskeleton.

Sensors (Basel) 2021 Sep 30;21(19). Epub 2021 Sep 30.

School of Mechanical Engineering, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an 710049, China.

With the emerging of wearable robots, the safety and effectiveness of human-robot physical interaction have attracted extensive attention. Recent studies suggest that online measurement of the interaction force between the robot and the human body is essential to the aspects above in wearable exoskeletons. However, a large proportion of existing wearable exoskeletons monitor and sense the delivered force and torque through an indirect-measure method, in which the torque is estimated by the motor current. Read More

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September 2021

Impact of centrifugation time and pneumatic tube transport on plasma concentrations of direct oral anticoagulants.

Int J Lab Hematol 2021 Oct 12. Epub 2021 Oct 12.

Department of Clinical Biochemistry, Aarhus University Hospital, Aarhus, Denmark.

Introduction: Rapid results are needed when plasma concentrations of direct oral anticoagulants (DOACs) are required in acute clinical settings. We evaluated the impact of centrifugation time and pneumatic tube transport on DOAC plasma concentrations with the overall aim of reducing turnaround time.

Methods: Blood samples were spiked with rivaroxaban, apixaban or dabigatran in a low and a high concentration prior to centrifugation for 25 minutes (3163 g) or 5 minutes (3000 g) (n = 20 for each DOAC). Read More

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October 2021

Controlled Fragmentation of Urinary Stones as a Method of Preventing Inflammatory Infections in the Treatment of Urolithiasis (Experience in Successful Clinical Use).

Sovrem Tekhnologii Med 2021 28;13(3):55-61. Epub 2021 Jun 28.

Leading Researcher, Federal Research Center Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanova St., Nizhny Novgorod, 603950, Russia.

The introduction of technologically advanced methods of lithotripsy into medical practice changes the nature of postoperative complications. Among them, the main complications are inflammatory infections. This largely determines the search for new, improved methods of stone fragmentation avoiding small stone fragments and dissemination of the pelvicalyceal system of the kidney with stone-associated infection. Read More

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Pneumatic Soft Actuators With Kirigami Skins.

Front Robot AI 2021 13;8:749051. Epub 2021 Sep 13.

Dynamic Matter Laboratory, Department of Mechanical Engineering, Clemson University, Clemson, SC, United States.

Soft pneumatic actuators have become indispensable for many robotic applications due to their reliability, safety, and design flexibility. However, the currently available actuator designs can be challenging to fabricate, requiring labor-intensive and time-consuming processes like reinforcing fiber wrapping and elastomer curing. To address this issue, we propose to use simple-to-fabricate kirigami skins-plastic sleeves with carefully arranged slit cuts-to construct pneumatic actuators with pre-programmable motion capabilities. Read More

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September 2021

A reproducible method for biochemical, histological and functional assessment of the effects of ischaemia-reperfusion syndrome in the lower limbs.

Sci Rep 2021 Sep 29;11(1):19325. Epub 2021 Sep 29.

Department of Surgery and Radiology and Physical Medicine, Faculty of Medicine and Nursing, University of the Basque Country UPV/EHU, Barrio Sarriena s/n, 48940, Leioa, Spain.

Current methodology described to mimic lower limb ischaemia-reperfusion injury (LL-IRI) does not accurately define the procedures and pressures exerted to induce and maintain ischaemia. In this piece of work, we propose a well-defined and detailed rat model that simulates the conditions established in clinical practice guidelines for tourniquet application and allows us to test treatments that aim to prevent/reduce LL-IRI. Eighty-six male WAG/RijHsd rats were subjected to hind limb IRI (LL-IRI), using a mechanical system applying a 1 kg tension to induce and maintain ischemia for 2 or 3 h, and assessed the damage caused by reperfusion at biochemical and muscular levels at different time points. Read More

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September 2021

Dynamic Pore Modulation of Stretchable Electrospun Nanofiber Filter for Adaptive Machine Learned Respiratory Protection.

ACS Nano 2021 Sep 29. Epub 2021 Sep 29.

Department of Mechanical Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea.

The recent emergence of highly contagious respiratory disease and the underlying issues of worldwide air pollution jointly heighten the importance of the personal respirator. However, the incongruence between the dynamic environment and nonadaptive respirators imposes physiological and psychological adverse effects, which hinder the public dissemination of respirators. To address this issue, we introduce adaptive respiratory protection based on a dynamic air filter (DAF) driven by machine learning (ML) algorithms. Read More

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September 2021

Quantifying Healthcare Utilization and Delay in the Treatment of Gastric Stenosis Following Sleeve Gastrectomy.

Obes Surg 2021 Sep 29. Epub 2021 Sep 29.

Department of Surgery, University of Michigan, Ann Arbor, MI, USA.

Background: Sleeve gastrectomy (SG) is the most common bariatric procedure performed. The incidence of gastric sleeve stenosis (GSS) is up to 4%, with a rising prevalence given increasing popularity of this surgery. GSS is best treated with pneumatic balloon dilation (PBD), but the diagnosis is not always straightforward, oftentimes leading to an extensive diagnostic workup. Read More

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September 2021

Somatosensory Gating Is Modulated by Anodal Transcranial Direct Current Stimulation.

Front Neurosci 2021 7;15:651253. Epub 2021 Sep 7.

Research Institute of Health Sciences (IUNICS), Balearic Islands Health Research Institute (IdISBa), University of the Balearic Islands (UIB), Palma, Spain.

Background: Anodal transcranial direct current stimulation (tDCS) of the somatosensory cortex causes cerebral hyperexcitability and a significant enhancement in pain thresholds and tactile spatial acuity. Sensory gating is a brain mechanism to suppress irrelevant incoming inputs, which is elicited by presenting pairs of identical stimuli (S1 and S2) within short time intervals between stimuli (e.g. Read More

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September 2021

Deflected Versus Preshaped Soft Pneumatic Actuators: A Design and Performance Analysis Toward Reliable Soft Robots.

Soft Robot 2021 Sep 21. Epub 2021 Sep 21.

Department of Automatic Control and Systems Engineering, University of Sheffield, Sheffield, United Kingdom.

Soft pneumatic actuators (SPAs) are customizable and conformable devices that enable desired motions in soft robots. Interactions with the environment or handling during their fabrication could introduce defects into SPAs that affect their performance. These defects could lead to high-stress concentrations in the SPA body and heterogeneous, unrepeatable, or inconsistent expansion affecting their reliability. Read More

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September 2021

Generative Design Procedure for Embedding Specified Planar Behavior in Modular Soft Pneumatic Actuators.

Soft Robot 2021 Sep 21. Epub 2021 Sep 21.

Department of Mechanical and Mechatronic Engineering, Stellenbosch University, Stellenbosch, South Africa.

A modular actuator construction consisting of smaller articulating units in series was designed to construct soft pneumatic actuators. These units are constructed to have a preferential bending direction using Mold Star 15 and Smooth-Sil 950 silicone. By changing the orientation of each unit, a different deformed actuator shape can be achieved. Read More

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September 2021

A meta-analysis and systematic review of holmium laser treatment of bladder stones.

Transl Androl Urol 2021 Aug;10(8):3465-3475

Department of Urology, Luzhou People's Hospital, Luzhou, China.

Background: Holmium lasers have been used to treat bladder stones and achieve good therapeutic effects, but its efficacy remains to be explored.

Methods: The PubMed, Embase, Medline, Ovid, Springer, and Web of Sciences databases were searched from their establishment to December 31, 2020. Studies of randomized control trials (RCTs) examining the treatment of vesical calculi by holmium laser lithotripsy were identified. Read More

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Exploring Tourniquet Conversion in Simulation to Develop Concepts and Hypotheses.

J Spec Oper Med 2021 ;21(3):23-29

Background: Compared with those of tourniquet application, tourniquet conversion concepts are underdeveloped. The purpose of this project was to develop tourniquet conversion concepts and generate hypotheses.

Methods: One person performed 100 tests of tourniquet application and conversion. Read More

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September 2021

Effectiveness and safety of ultrasound-guided hydrostatic reduction for children with acute intussusception.

Sci Prog 2021 Jul-Sep;104(3):368504211040911

Pediatric surgery, 191599First Affiliated Hospital of Zhengzhou University.

Objective: This study aims to explore the effectiveness and safety of the new-type ultrasound-guided hydrostatic reduction for children with acute intussusception.

Methods: The clinical data of 364 children with primary acute intussusception who underwent nonsurgical reduction in our hospital between January 2016 and May 2019 were retrospectively analyzed. Among the 364 children, 119 formed the hydrostatic reduction group. Read More

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September 2021

Achalasia in Children-Clinical Presentation, Diagnosis, Long-Term Treatment Outcomes, and Quality of Life.

J Clin Med 2021 Aug 30;10(17). Epub 2021 Aug 30.

Department of Gastroenterology, Hepatology, Feeding Disorders and Pediatrics, The Children's Memorial Health Institute, 04-730 Warsaw, Poland.

Background: In spite of the introduction of peroral endoscopic myotomy (POEM), Heller myotomy (HM) remains the mainstay of treatment and the role of pneumatic dilatation (PD) is being debated. The aim of this study was to present a single-center experience in the diagnostic approach and treatment of esophageal achalasia (EA), including the long-term assessment of the QoL.

Methods: Data collection was based on the retrospective analysis of clinical notes and prospective interviews with patients and their parents. Read More

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Predictive Factors for Blood Transfusion after Total Knee Arthroplasty.

Rev Bras Ortop (Sao Paulo) 2021 Aug 2;56(4):463-469. Epub 2020 Nov 2.

Divisão de Pesquisa, Instituto Nacional de Traumatologia e Ortopedia (INTO), Rio de Janeiro, RJ, Brasil.

 The present paper aims to (1) verify the incidence and volume of blood transfusion among patients undergoing unilateral cemented total knee arthroplasty (TKA) in a single Brazilian reference center; (2) identify pre and perioperative variables to determine subjects with higher risk (i.e., predictive factors) for blood transfusion within 48 hours following surgery; (3) estimate the risk of blood transfusion during the first 48 hours after the procedure. Read More

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[Ectopic Ureterocele of Adult Male with Urination Difficulty : A Case Report].

Hinyokika Kiyo 2021 Aug;67(8):381-384

The Department of Urology, Hyogo Prefectural Nishinomiya Hospital.

Ectopic ureteroceles is sometimes noted in children as an incidental finding in antenatal ultrasonography results or because of symptoms related to a urinary tract infection. In contrast, it is rarely noted in adults, with only 18 cases in Japan presented in literature. We report here a 30-year-old adult male with an ectopic ureterocele discovered due to urination difficulty. Read More

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CMOS-Inspired Complementary Fluidic Circuits for Soft Robots.

Adv Sci (Weinh) 2021 Aug 29:e2100924. Epub 2021 Aug 29.

Reconfigurable Robotics Laboratory, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, 1015, Switzerland.

The latest efforts in digital fluidic circuits' research aim at being electronics-free, light-weight, and compliant controllers for soft robots; however, challenges arise to adjust the fluidic circuit's digital logic operations. Currently there is no other way to modulate the amplitude or frequency but to structurally redesign the entire fluidic circuitry. This is mainly because there is currently no method to create an analog circuit-like behavior in the digital fluidic circuits using conventional digitized fluidic gates. Read More

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Endoscopic Management of Sleeve Stenosis.

Obes Surg 2021 Nov 23;31(11):4749-4753. Epub 2021 Aug 23.

Department of Surgery, Tel Aviv Sourasky Medical Center, affiliated with Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel.

Purpose: Sleeve gastrectomy is one of the most popular bariatric procedures performed. A complication of this surgery is sleeve stenosis, causing significant morbidity and the need for corrective intervention. Endoscopic treatment using pneumatic dilation has evolved as an effective, and minimally invasive, technique to successfully treat this complication. Read More

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November 2021

Ventilation measurements using fast-helical free-breathing computed tomography.

Med Phys 2021 Aug 19. Epub 2021 Aug 19.

Department of Radiation Oncology, University of California, Los Angeles, Los Angeles, California, USA.

Purpose: To examine the use of multiple fast-helical free breathing computed tomography (FHFBCT) scans for ventilation measurement.

Methods: Ten patients were scanned 25 times in alternating directions using a FHFBCT protocol. Simultaneously, an abdominal pneumatic bellows was used as a real-time breathing surrogate. Read More

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A soft neuroprosthetic hand providing simultaneous myoelectric control and tactile feedback.

Nat Biomed Eng 2021 Aug 16. Epub 2021 Aug 16.

Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.

Neuroprosthetic hands are typically heavy (over 400 g) and expensive (more than US$10,000), and lack the compliance and tactile feedback of human hands. Here, we report the design, fabrication and performance of a soft, low-cost and lightweight (292 g) neuroprosthetic hand that provides simultaneous myoelectric control and tactile feedback. The neuroprosthesis has six active degrees of freedom under pneumatic actuation, can be controlled through the input from four electromyography sensors that measure surface signals from residual forearm muscles, and integrates five elastomeric capacitive sensors on the fingertips to measure touch pressure so as to enable tactile feedback by eliciting electrical stimulation on the skin of the residual limb. Read More

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Combining Sensors Information to Enhance Pneumatic Grippers Performance.

Sensors (Basel) 2021 Jul 24;21(15). Epub 2021 Jul 24.

Istituto Italiano di Tecnologia, iCub-Tech Facility, Via San Quirico 19d, 16163 Genoa, Italy.

The gripper is the far end of a robotic arm. It is responsible for the contacts between the robot itself and all the items present in a work space, or even in a social space. Therefore, to provide grippers with intelligent behaviors is fundamental, especially when the robot has to interact with human beings. Read More

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Microscope-Integrated Intraoperative Optical Coherence Tomography-Guided Big-Bubble Deep Anterior Lamellar Keratoplasty.

Cornea 2021 Aug 6. Epub 2021 Aug 6.

Department of Ophthalmology, San Maurizio Regional Hospital, Bolzano, Italy; Department of Translational Medicine, University of Ferrara, Ferrara, Italy; Department of Ophthalmology, Ospedali Privati Forlì "Villa Igea," Forlì, Italy; and Istituto Internazionale per la Ricerca e Formazione in Oftalmologia (IRFO), Forlì, Italy.

Purpose: The purpose of this study was to evaluate the feasibility of microscope-integrated intraoperative optical coherence tomography (OCT) for real-time quantitative analysis of surgical planes in big-bubble deep anterior lamellar keratoplasty (DALK).

Methods: In this interventional case series, intraoperative OCT-guided big-bubble DALK was performed in 16 consecutive eyes of 16 patients with keratoconus. Trephination depth was measured using the intraoperative OCT caliper tool. Read More

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Revisional Therapy for Recurrent Symptoms After Heller Myotomy for Achalasia.

J Gastrointest Surg 2021 Aug 2. Epub 2021 Aug 2.

Department of Biomedical Sciences for Health, Division of General and Foregut Surgery, IRCCS Policlinico San Donato, University of Milan, Milano, Italy.

Purpose: Symptom recurrence after initial surgical management of esophageal achalasia occurs in 10-25% of patients. The aim of this study was to analyze safety and efficacy of revisional therapy after failed Heller myotomy (HM).

Methods: A retrospective review of a prospective database was performed searching for patients with recurrent symptoms after primary surgical therapy for achalasia. Read More

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Efficacy of arterial occlusion pressure estimation-based tourniquet pressure settings in upper limb surgery.

J Orthop Sci 2021 Jul 24. Epub 2021 Jul 24.

Department of Anaesthesiology and Reanimation, Başkent University School of Medicine, Ankara, Turkey. Electronic address:

Background: The use of a minimal individualized effective pneumatic tourniquet pressure is recommended to avoid pressure related complications in extremity surgery. The aim of this study was to investigate the efficacy of arterial occlusion pressure estimation-based tourniquet pressure settings in upper limb surgery.

Methods: Hundred and fifteen patients undergoing upper limb surgeries were enrolled in the present study. Read More

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Corrigendum: Design of an Inkjet-Printed Rotary Bellows Actuator and Simulation of its Time-Dependent Deformation Behavior.

Front Robot AI 2021 9;8:729549. Epub 2021 Jul 9.

Institute of Polymer Product Engineering, Johannes Kepler University Linz, Linz, Austria.

[This corrects the article DOI: 10.3389/frobt.2021. Read More

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Pneumatic retinopexy as a treatment for rhegmatogenous retinal detachment in pediatric patients meeting PIVOT criteria.

Can J Ophthalmol 2021 Jul 19. Epub 2021 Jul 19.

Department of Ophthalmology and Vision Sciences; University of Toronto, Faculty of Medicine, The John and Liz Tory Eye Centre, Sunnybrook Health Sciences Centre, Toronto, Ont.. Electronic address:

Objective: To report the results of pneumatic retinopexy (PnR) as the initial treatment in pediatric patients with rhegmatogenous retinal detachment (RRD) fulfilling The Pneumatic Retinopexy versus Vitrectomy for the Management of Primary Rhegmatogenous Retinal Detachment Outcomes Randomized Trial (PIVOT) criteria.

Design: A retrospective multicentre study.

Participants: Pediatric patients who underwent outpatient PnR as the initial treatment for RRD from January 2006 to July 2019 who met PIVOT criteria. Read More

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The effect of drone transport on the stability of biochemical, coagulation and hematological parameters in healthy individuals.

Clin Chem Lab Med 2021 Oct 22;59(11):1772-1776. Epub 2021 Jul 22.

Department of Clinical Chemistry, Isala Hospital, Zwolle, the Netherlands.

Objectives: Transport of blood tubes is mainly by car or pneumatic transport. The transportation of blood tubes by drones is a novel approach for rapid transportation of blood tubes over long distances. However, limited data on the stability of biochemical, coagulation and hematological parameters is available after transport of blood tubes by drone. Read More

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October 2021

Pneumatically Controlled Reconfigurable Bistable Bionic Flower for Robotic Gripper.

Soft Robot 2021 Jul 21. Epub 2021 Jul 21.

College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, China.

Beyond their colorful appearances and versatile geometries, flowers can self-shape-morph by adapting to environmental changes. Nature-inspired artificial systems that mimic their natural counterparts in function, flexibility, and adaptation find an emerging application in mobile robotics. In this study, a novel reconfigurable bionic flower made of petal-shaped bistable carbon fiber-reinforced composites and actuated by soft pneumatic actuators is presented. Read More

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Repetitive brief ischemia accelerates tibial shaft fracture healing: a 5-years prospective preliminary clinical trial (PCT).

BMC Musculoskelet Disord 2021 Jul 20;22(1):631. Epub 2021 Jul 20.

Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical University, 8 Gongren Tiyuchang Nanlu, Chaoyang District, Beijing, 100020, China.

Background: This study was to evaluate the effects of repetitive brief ischemia (RBI) on bone healing in patients with tibial shaft fractures.

Methods: In this prospective clinical trial, patients with tibia shaft fractures were enrolled between January 2016 and January 2021. The intermittent pneumatic compression (IPC) device was used to make RBI on the affected limb after surgical operation 24 h. Read More

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Incidence and factors influencing tourniquet pain.

Chin J Traumatol 2021 Sep 21;24(5):291-294. Epub 2021 May 21.

Department of Orthopaedics, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India.

Purpose: The use of tourniquet in orthopedic surgery facilitates operation by establishing a bloodless surgical field. However, many complications following the use of tourniquets have been reported. Tourniquet pain is the most common complication. Read More

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September 2021