scholarly journals P028 The Nox A1 ambulatory system is reliable when self-applied

2021 ◽  
Vol 2 (Supplement_1) ◽  
pp. A30-A30
Author(s):  
R Cuesta ◽  
T Roebuck ◽  
S Ho ◽  
M Naughton ◽  
E McDermott ◽  
...  
Keyword(s):  
Body Position ◽  
Diagnostic Testing ◽  
Position Sensor ◽  
Respiratory Effort ◽  
Good Reliability ◽  
Recording Time ◽  
Safe Method ◽  
Position Signal ◽  
Nasal Pressure ◽  
Anterior Tibialis

Abstract Background Home Sleep Apnea Tests (HSAT) increases access to SDB diagnostic testing (Safadi, 2014). A previous study defined a reliable HSAT if: ≥4hours total recording time, an intelligible position signal and respiratory effort, airflow and oximetry for at least 80% of the night were recorded, however, admits no standardized criteria in the literature (Domingo, 2010). Aim To test the reliability of a self-applied HSAT using the Nox-A1 ambulatory system (NOX Medical, Iceland). Method Patients self-applied the HSAT guided by industry produced video and written instructions. Signals for the HSAT included; two electro-occulagrams (EOG), two sub-mental electromyograms (EMG), a single modified frontal encephalogram (EEG), a lead I ECG, single leg anterior tibialis EMG, chest and abdominal inductance respiratory effort, nasal pressure airflow, WristOx 2 3150 SpO2 (Nonin Medical, Inc., USA) and 3-D accelerometer and body position sensor. Analysed with ProFusion PSG 4 (Compumedics Limited, Australia) after importing data into Nexus. 33 consecutive studies were recorded during lock-down. Recording satisfactory if SpO2 signal and EEG present >80% of study, it was considered a failure if doctor requested test repeat. Results 33 subjects, age 43.1 ± 13.7 years, BMI 27.4 ± 6.0 kg/m2, 66.6% male. 81.8% of studies satisfactory. 6% of studies needed a repeat in-lab PSG due to 1) loss of oximetry & EEG and 2) loss of EEG Discussion 6% doctor request repeat in-lab PSG is comparable to a study (Lloberes, 2001) of partially self-applied HSAT. Demonstrated good reliability with this self-applied COVID-safe method of HSAT.

Fault Tolerant and Nano Displacement Drive Control Method of Photoelectric Motor for Battery Electric Vehicle

2021 ◽  
Vol 16 (2) ◽  
pp. 293-302
Author(s):  
Weiping Liu ◽  
Zhaofeng Wang ◽  
Ximing Zhang ◽  
Yulin Wang ◽  
Bochun Hu ◽  
...  
Keyword(s):  
Electric Vehicle ◽  
Control Method ◽  
Displacement Sensor ◽  
Battery Electric Vehicle ◽  
Position Sensor ◽  
Low Resolution ◽  
Rotor Position ◽  
Displacement Sensors ◽  
Position Signal ◽  
Three Phase

The low-resolution photoelectric position sensor is used, that is, Hall position sensor replaces the traditional photoelectric encoder and other high-resolution position sensors to monitor the rotor position. However, because the three-phase Hall position sensor can only output six position signals, a hardware circuit design of low-resolution position sensor monitoring rotor position signal is proposed. Meanwhile, nanotechnology has been introduced in the study of micro drive of battery electric vehicle (BEV). BEV driver has some disadvantages such as hysteresis, creep and nonlinearity, which seriously affects its application in nano environment. A nano displacement sensor is designed for the characteristics of BEV driver. The nonlinear problem of micro driver is solved through the closed-loop control of position feedback. In the test, through the verification of rotor position and current waveform, it can be proved that the method based on photoelectric position sensor and rotor position signal monitoring can ensure the low deviation of rotor position calculation and correct output signal of three-phase photoelectric position sensor. The decoupling performance of vector control is verified by 3/2 transformation. In the displacement detection of micro driver, the designed nano displacement sensor has higher resolution and its performance is better than that of the previous three generations of displacement sensors.

Pilot Testing the Augmentech Body Position Sensor on the Morbidly Obese Patient

2013 ◽  
Vol 26 (2) ◽  
pp. 92-95 ◽  
Author(s):  
Mark C. Hand ◽  
Mary Ann Rose ◽  
Marie Elizabeth Pokorny ◽  
Ricky T. Castles ◽  
Frank Watkins ◽  
...  
Keyword(s):  
Obese Patient ◽  
Body Position ◽  
Morbidly Obese ◽  
Position Sensor ◽  
Pilot Testing ◽  
Morbidly Obese Patient

scholarly journals 1207 Keep It Simple: Wireless Patches For Home Sleep Diagnostics

SLEEP ◽  
2020 ◽  
Vol 43 (Supplement_1) ◽  
pp. A461-A461
Author(s):  
S O Zandieh ◽  
A Reuveny ◽  
S Pearson ◽  
A Mordechai ◽  
C Wang ◽  
...  
Keyword(s):  
Body Position ◽  
Small Sample ◽  
Respiratory Effort ◽  
Regression Analyses ◽  
Home Sleep Testing ◽  
Obstructive Sleep ◽  
Cloud Server ◽  
Effective Cost ◽  
Cost Efficient ◽  
Overnight Polysomnography

Abstract Introduction Despite growing use of home sleep testing for the diagnosis of obstructive sleep apnea (OSA), there are significant barriers including limited availability, high cost, and complex wires making it difficult for patients to use on their own. The objective of this study was to evaluate a new flexible, thin, and wireless adhesive patch (proprietor sensors, TatchSleep Pro [TSP]) for the detection of OSA and compare the validity to overnight polysomnography (PSG). The TSP transmits data wirelessly to a smartphone app which in turn uploads the data to a cloud server. Data is presented to a sleep professional via a dedicated interface to score and analyze the results. Methods Patients (n=9; mean age=47 (SD=10); mean BMI=33 (SD=6.6); 4 males) undergoing a PSG evaluation for OSA also wore 2 TSP patches applied on the chest and abdomen. The TSP patches detected respiratory effort, derived airflow, derived pressure, body position and movement. Two sets of respiratory data (with common SpO2 and heartrate as a reference from PSG) were created, one from PSG and one from the TSP. The data were then scored by a certified sleep technician, blinded to the conditions. Linear regression analyses were used to compare the two derived apnea-hypopnea indices (AHI). In the morning, all participants were asked about their experience using the TSP. The study was approved by the Western IRB. Results There was a significant correlation for AHI between the TSP and PSG (R2= 0.94; p<0.01). All participants found the TSP comfortable to wear and indicated that removing the patches was ‘easy’ or ‘very easy,’ Conclusion These preliminary results suggest the wireless TSP may be an effective, cost-efficient way to evaluate OSA. Despite small sample, results show promise as a new innovative product for home sleep testing. Support Supported by Tatch Inc.

scholarly journals Modern strategies of adaptation to the respiratory support as a way to reduce self-induced lung injury (SILI)

2020 ◽  
pp. 243-244
Author(s):  
M.M. Pylypenko ◽  
O.Yu. Khomenko
Keyword(s):  
Lung Injury ◽  
Dead Space ◽  
Body Position ◽  
Lung Damage ◽  
Respiratory Support ◽  
Shortness Of Breath ◽  
Respiratory Effort ◽  
Psychomotor Agitation ◽  
Obese People ◽  
Mechanical Lung Ventilation

Background. The success of respiratory support depends on the effectiveness of improving gas exchange, reducing lung damage, and adaptation of the respirator. Reduction of lung damage has previously been reported in the context of ventilator-associated injury: barotrauma in case of high plateau pressure and driving pressure, volume trauma in case of large tidal volume, atelectasis trauma due to the cyclic collapse of lungs on exhalation and opening on inspiration. Objective. To describe the features of lung damage during mechanical lung ventilation (MLV) and the possibility of its prevention. Materials and methods. Analysis of literature sources on this topic. Results and discussion. The main causes of “air hunger” breathing type and shortness of breath include hypoxia, acidosis, increased anatomical and functional dead space, psychomotor agitation and fear. Metabolic acidosis is compensated by hyperventilation and respiratory alkalosis, but it is treated by improving oxygenation. High-flow oxygenation helps to leach CO2 from the dead space. Psychomotor agitation and pain aggravate shortness of breath, so all components of these processes should be influenced by effective analgesia, providing the patient with a comfortable body position (especially obese people), ensuring the absence of hunger and thirst, creating conditions for night sleep and more. If all these measures are taken, but the patient’s agitation is maintained, sedation should be considered. Propofol and dexmedetomidine are increasingly used for short-term sedation. Approaches to sedation have been changing abroad in recent years. First, non-pharmacological methods are used and only then – pharmacological ones. First of all, it is recommended to achieve analgesia, and then – sedation. It is advisable to maintain moderate sedation (from 0 to -2 on the RASS scale) and avoid deep sedation (from -3 to -5 points on the RASS scale). Sedation should be stopped each morning for the wake-up test and the respirator quitting test. To improve the immediate consequences of treatment (duration of MLV and stay in the intensive care unit), it is advisable to minimize the use of benzodiazepines and prefer propofol or dexmedetomidine. The depth of sedation should be constantly monitored, however, even experienced physicians may not always be able to detect asynchrony and excessive sedation. Asynchrony is associated with the increased mortality and prolonged weaning. To assess the intensity of the patient’s respiratory effort, the index of rapid shallow breathing, the maximum vacuum in the airways and the pressure in 0.1 second after the start of the breathing attempt are used. If the latter exceeds 3.5 cm H2O, it indicates the excessive respiratory effort of the patient (Telias I. et al., 2020). Conclusions. 1. The term “self-induced lung injury” has become widely used in the practice of anesthesiologists. 2. The need for respiratory support is determined primarily by the patient’s breathing efforts. 3. The ability to timely identify and respond to asynchrony helps to avoid self-induced lung damage.

scholarly journals PERBAIKAN KUALITAS TIDUR BERDASARKAN POSISI TUBUH SAAT TIDUR MENGGUNAKAN BODY POSITION SENSOR

Sebatik ◽  
2018 ◽  
Vol 22 (2) ◽  
pp. 194-201
Author(s):  
Theta Dinnarwaty Putri ◽  
Winarno Sugeng ◽  
Bintang Candra Ayu Srikandi
Keyword(s):  
Body Position ◽  
Position Sensor

Kebutuhan tidur yang cukup tidak hanya ditentukan oleh faktor jam tidur (kuantitas tidur), tetapi juga oleh kedalaman tidur (kualitas tidur). Baik buruknya kualitas tidur seseorang bergantung pada usaha mereka sendiri untuk mengoptimalkannya, namun banyak pula yang memiliki kualitas tidur yang buruk. Kualitas tidur bisa dideteksi berdasarkan posisi tubuh dengan menggunakan sensor, salah satunya body position sensor. Sensor ini terdiri dari accelerometer yang menghasilkan nilai x-axis, y-axis, dan z-axis. Melalui Arduino diolah nilainya sehingga posisi tubuh dapat dikenali dan dikirim ke sistem. Data ini adalah data yang akan digunakan sebagai nilai posisi tubuh dominan kemudian dicocokkan dengan dataset ilmu kesehatan sehingga mendapatkan hasil kualitas tidur. Apabila hasil kualitas tidur buruk, maka sistem akan mengaktifkan vibration motor untuk mengganggu tidur pengguna, sehingga pengguna berganti posisi. Pada penelitian ini, diperoleh hasil kualitas tidur dimana keluaran setiap pengujian pada beberapa pengguna bergantung pada posisi tidur dominan yang dilakukan pengguna dengan durasi selama satu jam.

Use of a screening tool for detection of sleep-disordered breathing

2009 ◽  
Vol 123 (7) ◽  
pp. 746-749 ◽  
Author(s):  
A L Clark ◽  
S Crabbe ◽  
A Aziz ◽  
P Reddy ◽  
M Greenstone
Keyword(s):  
Body Mass Index ◽  
Standard Deviation ◽  
Sleep Disordered Breathing ◽  
Screening Tool ◽  
Diagnostic Testing ◽  
High Sensitivity ◽  
Sleep Apnoea ◽  
High Risk Populations ◽  
The Mean ◽  
Nasal Pressure

AbstractBackground:Sleep apnoea, whether obstructive or central, is usually diagnosed by polysomnography. A simpler tool for screening high risk populations may be of value.Methods:We compared a portable device using nasal pressure cannulae and a high-sensitivity pressure sensor (the ApneaLink®) with our standard polysomnography technique for diagnosing sleep apnoea (using the Embletta® device), in 67 patients being investigated for possible sleep apnoea. The patients' average age was 52.6, 79 per cent were male, the mean body mass index was 32.3, and the mean Epworth sleepiness score was 13.0.Results:Twenty-five patients (45 per cent) were identified as having an apnoea–hypopnoea index of >15, as measured by the Embletta. The mean (standard deviation) apnoea–hypopnoea index was 21.5 ± 23.0 as measured by the Embletta and 24.3 ± 26.2 as measured by the ApneaLink. The sensitivity of the ApneaLink for an apnoea–hypopnoea index cut-off point of 15 was 92 per cent and the specificity was 96.7 per cent. The negative predictive value of the ApneaLink for an apnoea–hypopnoea index of ≤15 was 94 per cent.Conclusions:The ApneaLink is a useful tool for screening patients thought to have possible sleep apnoea, and for selecting patients for definitive diagnostic testing.

Prone or Supine Body Position and Sleep Characteristics in Infants

PEDIATRICS ◽  
1993 ◽  
Vol 91 (6) ◽  
pp. 1112-1115 ◽  
Author(s):  
A. Kahn ◽  
J. Groswasser ◽  
M. Sottiaux ◽  
E. Rebuffat ◽  
P. Franco ◽  
...  
Keyword(s):  
Eye Movement ◽  
Body Position ◽  
Water Evaporation ◽  
Blood Levels ◽  
Rapid Eye Movement ◽  
Rapid Eye Movement Sleep ◽  
Promoting Effect ◽  
Recording Time ◽  
Arterial Blood ◽  
Significant Difference

Objective. To evaluate the potential relation between body position and sleep characteristics in normal infants. Patients. Two groups of 3-month-old healthy infants were evaluated: 40 infants who usually slept supine, and 40 who usually slept prone. The two groups were matched for gender, gestational age, postnatal age, birth weight, and total recording time. Recording techniques. The 80 infants were studied polygraphically during one night in the pediatric sleep laboratory. They were allowed to fall asleep in their usual sleep position, and every 3 hours were gently turned from prone to supine, or from supine to prone. Results. In each group, 6 infants were excluded from the analysis, because they woke up after having been turned over. In both groups, no significant difference was seen between the prone and the supine body positions for the following variables: number of sleep state changes; number of gross body movements; percent of rapid eye movement sleep; saturation with oxygen, arterial blood levels; number and duration of acid esophageal reflux; rectal temperature; mean respiratory rates; water evaporation rates from the forehead skin; and number or duration of central or of obstructive apneas. In both groups of infants, prone body position was associated with a significant increase in sleep duration (+ 6%) and in non-rapid eye movement sleep (+25%) and a significant decrease in number of arousals (–40%) and in their duration (–43%). Conclusions. No explanation has been found for the sleep-promoting effect of prone body positioning. The finding could be of interest to the study of infants' sleep quality, as well as to the potential relation between body positions and sudden death during sleep.

Gastroesophageal Reflux Disease: A Gastroenterologist's Perspective

2011 ◽  
Vol 21 (3) ◽  
pp. 89-99
Author(s):  
Michael F. Vaezi
Keyword(s):  
Gastroesophageal Reflux Disease ◽  
Gastroesophageal Reflux ◽  
Reflux Disease ◽  
Best Practice ◽  
Clinical Care ◽  
Diagnostic Testing ◽  
Diagnostic Tools ◽  
Swallowing Function ◽  
Atypical Symptoms

Gastroesophageal reflux disease (GERD) is a commonly diagnosed condition often associated with the typical symptoms of heartburn and regurgitation, although it may present with atypical symptoms such as chest pain, hoarseness, chronic cough, and asthma. In most cases, the patient's reduced quality of life drives clinical care and diagnostic testing. Because of its widespread impact on voice and swallowing function as well as its social implications, it is important that speech-language pathologists (SLPs) understand the nature of GERD and its consequences. The purpose of this article is to summarize the nature of GERD and GERD-related complications such as GERD-related peptic stricture, Barrett's esophagus and adenocarcinoma, and laryngeal manifestations of GERD from a gastroenterologist's perspective. It is critical that SLPs who work with a multidisciplinary team understand terminology, diagnostic tools, and treatment to ensure best practice.

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