Application Of Pressure Monitoring Research Articles

Application and Enlightenment of High Frequency Pressure Monitoring in Fracturing of Fengxi Block

Abstract Volumetric fracturing of large-scale horizontal Wells is one of the important techniques for unconventional oil and gas production. However, there are no effective quantitative methods to describe key parameters such as fracture size and formation flow parameters. The high frequency pressure monitoring technology is to install a high frequency pressure gauge at the wellhead, and obtain the fracture initiation position and the sealing property of the bridge plug through monitoring and analysis of the water hammer wave during the period of pump shutdown. At the same time, the fracturing scale, permeability and the original formation pressure are obtained by combining the analysis of seepage pressure. On the basis of quantitative monitoring results, the relationship between fracture parameters and geological and engineering factors is deeply analyzed, and the following conclusions are obtained. (1) The number of fractures opened is mainly affected by the physical properties of the reservoir, which in turn affects the amount of liquid intake and sand of the single cluster opened, and finally affects the length and height of fractures in the core area. (2) The fracture morphology is affected by the construction scale and reservoir mechanical properties of a single cluster, while the SRV of the core area and the overall SRV are more affected by the overall construction scale.

Barometric pressure monitoring and multiple applications based on pulsed airflow-driven silver nanoparticles/copper foam triboelectric nanogenerators

Abundant high-pressure exhaust gas is generated during industrial production processes. The direct release of this exhaust gas not only leads to energy dissipation but also increases the accident risk. Therefore, it is essential to utilize and monitor high-pressure exhaust gas. This study designed a triboelectric nanogenerator (TENG) driven by high-pressure pulse airflow to realize energy harvesting and pressure monitoring at the gas–solid interface. The silver nanoparticles (Ag NPs)/ copper foam (CF)-based TENG (SC-TENG) were fabricated and exhibited excellent output characteristics. Compared to the copper-based TENG, the short-circuit current and output power were increased by 68.72 % and 63.34 %, respectively, which could directly light up 111 light-emitting diodes (LEDs). Furthermore, the effects of pipeline mateal, valve material, preparation environment (AgNO3 concentration), and air pressure were investigated to optimize the electric output of SC-TENG. The SC-TENG exhibited excellent pressure sensing capabilities and could be applied for rapid and sensitive long-term monitoring. Based on this, a wireless high-pressure warning system was designed to realize signal transmission and safety pre-warning. Lastly, a novel information encryption method based on pulse airflow was developed, and its potential applications in various fields were discussed. This work not only proposes a utilization and solution strategy for high-pressure exhaust gas issues to realize the principle of “turning waste into treasure”, but also provides valuable insights into the extended applications of TENG technology.

Design Considerations of Implantable MEMS Sensor for Bladder Pressure Monitoring: A Review

One of the main urinary disorders that impairs the bladder's capacity to regulate urine flow is urinary incontinence (UI). Currently, the new development of wireless implantable MEMS sensors has been studied to replace current clinical test of bladder pressure. This new invention grants a long-term pressure monitoring within the bladder, less painful with non-surgical, reducing the potential of infection thus maintains the patient’s quality of life. However, developing implanted BioMEMS sensors pose challenging tasks due to various constraint requirements that need to be fulfilled such as appropriate measurement ranges and bandwidth, suitable transduction mechanism, biocompatible materials, structural shape and size as well as wireless telemetry capability. This paper presents a review on implantable MEMS sensors and design challenges specifically for bladder pressure monitoring application.

Elastomeric-coated FBGs for point-of-care diagnostics

This study deploys the application of Fiber Bragg Gratings (FBGs) in physiological pressure monitoring by integrating an elastomeric, biocompatible coating ranging from 300-500μm, designed to improve sensor functionality for in-vivo pressure monitoring applications. FBGs are favored for their sensitivity, immunity to electromagnetic interference, and compact size, making them ideal for embedding within medical devices such as catheters and guidewires. However, their use has been limited by low inherent pressure sensitivity (3.14 pm/MPa) and the impracticality of thicker coatings described in previous studies. Our approach demonstrates that this unique coating not only boosts the pressure sensitivity significantly—surpassing 1.63 orders of magnitude (43.10 times)—but also enhances the signal-to-noise ratio of the optical signal. These advancements enable potential applications in high-resolution manometry, gastrointestinal pressure monitoring, intracranial and intracoronary blood pressure measurements, marking a significant step forward in medical diagnostics and monitoring.

Features of the application and evaluation of urgent blood pressure monitoring at the pre-hospital stage

The purpose of the study. Search for criteria for objectifying the safety of emergency treatment of hypertension syndrome at the outpatient stage of emergency medical care.Tasks: 1) еvaluate the possibility of hardware monitoring of blood pressure at the pre-hospital stage of emergency care; 2) select indicators that allow you to objectively assess the safety of emergency antihypertensive therapy with various two-component drug combinations; 3) the use of urgent blood pressure monitoring to demonstrate the differences between the safety of combinations of captopril with furosemide, moxonidine with furosemide, moxonidine with nifedipine.Materials and methods. At the prehospital stage, blood pressure monitoring was carried out during the day simultaneously with taking a number of combinations of antihypertensive drugs (captopril and furosemide, moxonidine and furosemide, moxonidine and nifedipine). In the absence of intolerance to any of the studied drugs, the choice of drugs was carried out by fixed randomization using a table of random numbers. A total of 91 patients were included in the study, in whom the results of an instrumental study were analyzed against the background of drug therapy.Results. To assess the effectiveness and safety of antihypertensive treatment, the protocol for analyzing primary data was modified, new highly informative quantitative criteria for assessing the effect of various drug combinations on the temporal dynamics of blood pressure were developed.Conclusion. The proposed research methodology allows documenting the course of emergency therapy and can be offered for use during outpatient treatment

Incorporating Wireless Strategies to Wearable Devices Enabled by Photocurable Hydrogel for Monitoring Pressure Information.

Advances in emerging technologies for wireless collection and the timely analysis of various information captured by wearable devices are of growing interest. Herein, we propose a crosslinked ionic hydrogel prepared by a facile photocuring process, that allows wearable devices to be further incorporated into two wireless integrated systems for pressure monitoring applications. The device exhibits a simplified structure by effectively sharing functional layers, rather than conventional two separate combinations, offering the salient performance of iontronic sensing and electrochromic properties to simultaneously quantify and visualize pressure. The developed smart patch system was demonstrated to monitor physiological signals in real-time using the user interface of remote portable equipment with Bluetooth protocol and on-site electrochromic displays. Moreover, a passive wireless system based on the magnetic coupling effect was designed, which could operate free from the battery and simultaneously acquire multiple pressure information. It is envisioned that the strategies would hold enormous potential for flexible electronics, versatile sensing platforms and wireless on-body networks. This article is protected by copyright. All rights reserved.

An Ultra‐Sensitive Flexible Resistive Sensor with Double Strain Layer and Crack Inspired by the Physical Structure of Human Epidermis: Design, Fabrication, and Cuffless Blood Pressure Monitoring Application

AbstractThe cuffless blood pressure (BP) monitoring device has attracted much attention because of its comfortable and real‐time monitoring. Inspired by the physical structure of the human epidermis, an ultra‐sensitive flexible resistive sensor with a double strain layer and crack structure is prepared by screen printing in this study. The strain material of the sensor is mainly prepared by blending Poly(3,4‐ethylenedioxythiophene) :poly(styrenesulfonate) (PEDOT:PSS) with waterborne polyurethane and reduced graphene oxide. The sensor exhibits a high gauge factor (GF, ≈1682), fast response (≈48 ms), and long‐term stability (> 2000 cycles) at low strain (≈0–5%). The sensor is placed on the human radial artery and can accurately measure the pulse wave. The features of the pulse wave are automatically extracted using a convolutional neural network. Then the features are corrected using a long short‐term memory neural network, and the current BP value is predicted using a fully connected network layer. The BP result meets the A‐level standards of the Association for the Advancement of Medical Instrumentation and the British Hypertension Society. This study provides an efficient device and method for continuous and non‐invasive BP monitoring.

WAVES – The Lucile Packard Children’s Hospital Pediatric Physiological Waveforms Dataset

WAVES is a large, single-center dataset comprising 9 years of high-frequency physiological waveform data from patients in intensive and acute care units at a large academic, pediatric medical center. The data comprise approximately 10.6 million hours of 1 to 20 concurrent waveforms over approximately 50,364 distinct patient encounters. The data have been de-identified, cleaned, and organized to facilitate research. Initial analyses demonstrate the potential of the data for clinical applications such as non-invasive blood pressure monitoring and methodological applications such as waveform-agnostic data imputation. WAVES is the largest pediatric-focused and second largest physiological waveform dataset available for research.

Temperature and Humidity Sensitivity of Polymer Optical Fibre Sensors Tuned by Pre-Strain.

Polymer optical fibre Bragg grating (POFBG) sensors are of high interest due to their enhanced fracture toughness, flexibility in bending, and sensitivity in stress and pressure monitoring applications compared to silica-based sensors. The POFBG sensors can also detect humidity due to the hydrophilic nature of some polymers. However, multi-parameter sensing can cause cross-sensitivity issues in certain applications if the temperature and humidity measurements are not adequately compensated. In this work, we demonstrate the possibility of selectively tuning sensors’ temperature and humidity sensitivities to the desired level by applying a certain amount of fibre pre-strain. The temperature sensitivity of POFBG sensors fabricated in perfluoropolymers (CYTOP) can be selectively tuned from positive to negative values, having the option for insensitivity in specific temperature ranges depending on the amount of the applied pre-strain. The humidity sensitivity of sensors can also be changed from positive values to insensitivity. The importance of thermal annealing treatment of POFBG sensors for improved repeatability in temperature measurements is also reported. An array of 4 multiplexed POFBGs was fabricated, and each sensor was pre-strained accordingly to demonstrate the possibility of having targeted temperature and humidity sensitivities along the same fibre.

Application of Invasive Arterial Blood Pressure Monitoring in ICU Critical Patients and Analysis of Its Nursing Methods

Application of Invasive Arterial Blood Pressure Monitoring in ICU Critical Patients and Analysis of Its Nursing Methods

Ambulatory Blood Pressure Monitoring in Children and Adolescents: 2022 Update: A Scientific Statement From the American Heart Association.

Use of ambulatory blood pressure monitoring in children and adolescents has markedly increased since publication of the last American Heart Association scientific statement on pediatric ambulatory blood pressure monitoring in 2014. In addition, there has also been significant expansion of the evidence base for use of ambulatory blood pressure monitoring in the pediatric population, including new data linking ambulatory blood pressure levels with the development of blood pressure-related target organ damage. Last, additional data have recently been published that enable simplification of the classification of pediatric ambulatory monitoring studies. This scientific statement presents a succinct review of this new evidence, guidance on optimal application of ambulatory blood pressure monitoring in the clinical setting, and an updated classification scheme for the interpretation of ambulatory blood pressure monitoring in children and adolescents. We also highlight areas of uncertainty where additional research is needed.

Application of Invasive Arterial Blood Pressure Monitoring in Surgical Anesthesia

Application of Invasive Arterial Blood Pressure Monitoring in Surgical Anesthesia

Application of Endotracheal Tube Cuff Pressure Monitoring during Percutaneous Dilatational Tracheostomy: A Novel Technique.

Endotracheal tube (ETT) cuff pressure monitoring during percutaneous dilatational tracheostomy (PDT) procedure is an easy-to-use innovative addition to the standard blind technique in a resource-limited setting. This technique can be carried out without disconnecting the breathing circuit, resulting in a lower risk of infectious aerosol generation.How to cite this articleMohammad H, Jain G, Agarwal A, Kausar S, Sama S. Application of Endotracheal Tube Cuff Pressure Monitoring during Percutaneous Dilatational Tracheostomy: A Novel Technique. Indian J Crit Care Med 2021;25(9):1040–1041.

Comprehensive Review on Triboelectric Nanogenerator Based Wrist Pulse Measurement: Sensor Fabrication and Diagnosis of Arterial Pressure.

As the world is marching into the era of the Internet of things (IoTs) and artificial intelligence (AI), the most vital requirement for reliable hardware development is an ultrafast response time and no performance degradation. As a reliable indicator of human physiological health, blood pressure measurement is vital in humans' daily lives, which creates a huge demand in monitoring and diagnosing blood pressure problems. The triboelectric nanogenerator (TENG) is one of the best energy devices and healthcare applications in the new era since triboelectrification is a universal and ubiquitous effect with an abundant choice of materials. TENG is reliable in physiological monitoring applications and has many benefits, including being inexpensive, easy to manufacture, and lightweight, having self-powered properties, and being available in a wide range of materials. In this review, triboelectric nanogenerator based wrist pulse measurement was summarized for blood pressure monitoring and diagnosis applications. As per the Ayurveda, imbalance in three essential components of the wrist pulse implies the human health status and reveals symptoms for diseases. The design of different TENG-based blood pressure sensors, sensing mechanisms, performance, merits, and demerits of each method are discussed.

Flexible M-Tooth Hybrid Micro-Structure-Based Capacitive Pressure Sensor With High Sensitivity and Wide Sensing Range

A novel flexible capacitive pressure sensor based on hybrid micro-structured (HM) polydimethylsiloxane (PDMS) dielectric layer was developed. The HM-PDMS with M-tooth structured patterns was fabricated using a laser engraved acrylic master mold. The top and bottom electrodes were fabricated by depositing silver (Ag) on flexible polyethylene terephthalate (PET) substrate using additive screen-printing process. The pressure sensor was assembled by sandwiching two HM-PDMS based dielectric layers between the top and bottom electrodes. The capability of the developed pressure sensor to detect a wide range of pressure was investigated by applying varying pressure from 0 to 1 kPa, 1 to 10 kPa, and 10 kPa to 40 kPa. A sensitivity of 51.36% kPa-1, 8.37% kPa-1, and 2.46% kPa-1 was obtained for the pressure ranges of 0 to 1 kPa, 1 to 10 kPa, and 10 to 40 kPa, respectively. The capacitive pressure sensor response, hysteresis, and repeatability of the fabricated pressure sensor is investigated and presented in this paper. To demonstrate the wide sensing range of the pressure sensor, the sensor was attached to face mask for breath monitoring applications that require low pressure sensing of ~20 Pa, and to the hand glove for fingertip pressure monitoring applications that require relatively high pressure sensing of ~3 kPa.

Application and nursing of invasive blood pressure monitoring in ICU

Objective: To explore the application and nursing effect of invasive blood pressure monitoring in ICU. Methods: a total of 44 patients admitted to ICU in our hospital were selected as the research objects, all from July 2019 to October 2020.we explored the catheterization skills, monitoring methods and effective nursing measures for various complications, so as to summarize their advantages and nursing points. Results: The indwelling time of the 44 patients with catheterization was 3-5 days. During the indwelling period, there were 3 patients with catheterization, 8 patients with catheterization blockage, and 2 patients with puncture point penetration. No serious catheter infection, arterial thrombosis and other complications occurred. Conclusion: the application of the invasive blood pressure monitoring in ICU can accurately present the patients blood pressure change, provide reliable basis for clinical diagnosis and treatment, and during the period of blood pressure monitoring must do a good job in nursing, so as to enhance the monitoring effect, the dynamic response in patients with blood pressure change, thus effectively to ensure the safety of patients and reduce complications.

Design and development of an embedded sensors matrix for pressure mapping and monitoring applications

Despite improvements in medical industry and the consequent healthcare modernization, pressure ulcers prevalence remains high, particularly in hospitalized patients. This kind of skin injury affects the patients’ quality of life and their caregivers, being an important cause of morbidity and, in some cases, contribute to the increase of the mortality rate. The use of support surfaces is an important consideration in pressure redistribution and consequent prevention, although its can never remove all of the body's pressure, which is one of the factors with the greatest impact on the development of pressure ulcers. This work aims to demonstrate a new concept of pressure sensing/monitoring system, from which the caregiver will have the perception of the body parts exposed to excessive pressure. This system consists of a resistive sensor array made from Force Sensing Resistors (FSR) embedded in a textile substrate. The developed system is a demonstrator that can be used as support for the construction of a more robust pressure mapping system, able to measure pressure distribution of a lying person. In addition, this system can also be used for the creation of an actuation system, which responds to pressure relief needs based on the sensing system feedback.

Prognostic value of intracranial pressure monitoring for the management of hypertensive intracerebral hemorrhage following minimally invasive surgery.

The incidence of hypertensive intracerebral hemorrhage (HICH) has been increasing during the recent years in low- and middle-income countries. With high mortality and morbidity rates, it brings huge burden to the families. It lacks evidence regarding the application of intracranial pressure (ICP) monitoring in HICH. In the current study, the authors aimed to evaluate whether ICP monitoring could make any difference on the prognosis of HICH patients after minimally invasive surgery. A retrospective review of 116 HICH patients admitted to the Second Affiliated Hospital of Zhejiang University School of Medicine, between 2014 and 2016, was performed. The effects of ICP monitoring on 6-month mortality and favorable outcomes were evaluated by univariate and logistic regression analysis. ICP monitors were inserted into 50 patients. Patients with ICP monitoring had a significantly better outcome (P<0.05). The average in-hospital duration in patients with ICP monitoring was shorter than that in the patients without ICP monitoring (16.68 days vs. 20.47 days, P<0.05). Mortality rates between ICP monitoring and no ICP monitoring did not differ significantly (16.0% vs. 15.1%, P=0.901). On univariate analysis, age, Glasgow Coma Scale (GCS) on admission and presence of ICP monitor were independent predictors of 6-month favorable outcomes. ICP monitoring is associated with a better 6-month functional outcome compared with no ICP monitoring. Future study is still needed to confirm our results and elucidate which subgroup of HICH patients will benefit most from the minimally invasive surgical intervention and ICP monitoring.

Optimization of LC sensor enabling wireless passive intracranial pressure monitoring

With the increasingly widespread researches of wireless passive sensing technology based on LC sensors in the field of intracranial pressure (ICP) monitoring and other biomedical applications, the importance of sensor optimization has become increasingly prominent. This paper presents an optimization method of LC sensor enabling wireless passive ICP monitoring. The LC sensor is a resonant tank formed by a pressure-sensitive capacitor and a fixed inductor. The parameters of the capacitor and the inductor are optimized based on four optimization criteria: maximizing sensitivity, setting anodic bonding voltage less than pull-in voltage, maximizing quality factor and setting an upper limit of resonant frequency. Among them, the pull-in voltage is a critical value when pull-in effect occurs during anodic bonding, a key step in the process of capacitor fabrication. To analytically calculate the pull-in voltage, a pull-in effect model is built, and its effectiveness is verified by simulation and experiment. Based on the above-mentioned optimization criteria, the LC sensor is optimized, fabricated and characterized. The experimental results show that the optimized sensor achieves competitive sensitivity, quality factor and resonant frequency compared with the previous reports, and illustrate the effectiveness of the optimization method enabling ICP monitoring.

Combining Wireless Technology and Behavioral Economics to Engage Patients (WiBEEP) with cardiometabolic disease: a pilot study

BackgroundThe long-term management of cardiometabolic diseases, such as type 2 diabetes and hypertension, is complex and can be facilitated by supporting patient-directed behavioral changes. The concurrent application of wireless technology and personalized text messages (PTMs) based on behavioral economics in managing cardiometabolic diseases, although promising, has not been studied. The aim of this pilot study was to evaluate the feasibility and acceptability of the concurrent application of wireless home blood pressure (BP) monitoring (as an example of “automated hovering”) and PTMs (as an example of “nudging”) targeting pharmacotherapy and lifestyle habits in patients with cardiometabolic disease (type 2 diabetes and/or hypertension).MethodsThe Wireless Technology and Behavioral Economics to Engage Patients (WiBEEP) with cardiometabolic disease study was a single-arm, open-label, 7-week-long pilot study in 12 patients (mean age 58.5 years) with access to a mobile phone. The study took place at Tufts Medical Center (Boston, MA) between March and September 2017. All patients received PTMs; nine patients received wireless home BP monitoring. At baseline, patients completed questionnaires to learn about their health goals and to assess medication adherence; at the end of week 7, all patients completed questionnaires to evaluate the feasibility and acceptability of the intervention and assess medication adherence. Hemoglobin A1c was ascertained from data collected during routine clinical care in 7 patients with available data.ResultsThe majority of patients reported the text messages to be easy to understand (88%) and appropriate in frequency (71%) and language (88%). All patients reported BP monitoring to be useful. Mean arterial pressure was lower at the end-of-study compared to baseline (− 3.4 mmHg [95% CI, − 5 to − 1.8]. Mean change in hemoglobin A1c was − 0.31% [95% CI, − 0.56 to − 0.06].ConclusionsAmong patients with cardiometabolic disease, the combination of wireless BP monitoring and lifestyle-focused text messaging was feasible and acceptable. Larger studies will determine the long-term effectiveness of such an approach.