Validation of the disposable T-piece resuscitator (Neo-Tee): a bench study

2019 ◽  
Vol 104 (6) ◽  
pp. F594-F597
Author(s):  
Lizzy de Groene ◽  
Anne P De Jaegere ◽  
Olivier J Nijland ◽  
Anton H van Kaam
Keyword(s):  
Gas Flow ◽  
Peep Level ◽  
Peak Inspiratory Pressure ◽  
Face Mask ◽  
Positive Pressure ◽  
Bench Study ◽  
Wide Range ◽  
Airway Opening ◽  
Set Up ◽  
Static Conditions

ObjectiveThe Neo-Tee Infant T-piece resuscitator is a disposable T-piece resuscitator. The aim of this bench study was to assess the accuracy of the Neo-Tee using a measurement set-up and settings mimicking clinical practice.Study designNine Neo-Tee devices were tested using a face mask interface and a manikin. Pressures were set using the built-in manometer and simultaneously measured at the interface. Peak inspiratory pressure (PIP) and positive end-expiratory pressure (PEEP) were studied under static conditions and positive pressure ventilation (PPV), using a wide range of clinically relevant flows and pressures. Pressures were measured without adjusting for a possible offset of PIP and PEEP after switching from static pressures to PPV. In an additional subset of measurements, PIP/PEEP offsets on the Neo-Tee manometer after starting PPV were adjusted.ResultsUnder static conditions, setting the PEEP level with the Neo-Tee manometer results in overestimation of the true PEEP applied at the airway opening, with a difference of approximately 1.5 cmH2O. When switching to PPV, this difference almost disappears. In contrast to PEEP, PIP levels measured at the airway opening were accurate.Adjusting PIP and PEEP on the built-in manometer after starting PPV was necessary in all measurements, but this did not improve the accuracy of the targeted pressure delivery, especially for PEEP. A gas flow rate of 5 L/min was insufficient to reach commonly used PEEP levels of 5 cmH2O.ConclusionThe Neo-Tee T-piece resuscitator is accurate for delivering a static inflation and PPV, but not for delivering continuous positive airway pressure.

Comparing positive pressure ventilation efficacy of a novel foot operated resuscitator with self-inflating bag and mask in a manikin model

2020 ◽  
Vol 6 (2) ◽  
pp. 48-54
Author(s):  
Somashekhar Marutirao Nimbalkar ◽  
Binoy Viresh Shah ◽  
Amee Atulkumar Amin ◽  
Vishwa Tushar Patel ◽  
Ajay Gajanan Phatak
Keyword(s):  
Neonatal Intensive Care ◽  
Positive Pressure Ventilation ◽  
Pressure Sensors ◽  
Peak Inspiratory Pressure ◽  
Comparative Trial ◽  
Face Mask ◽  
Target Range ◽  
Positive Pressure ◽  
Medical Systems ◽  
Inspiratory Time

AimTo compare positive pressure ventilation efficacy of a novel foot operated resuscitator (FOR) during positive pressure ventilation with that of self-inflating bag and mask (SIBM) using a manikin model.MethodA comparative trial was conducted with 117 participants at a level III neonatal intensive care unit using Baby Anne (Laerdal Medical, Norway). Flow and pressure sensors were used to measure tidal volume propelled (Vp) and delivered (Vt). Each participant delivered 60 breaths, using each device targeting adequate chest-rise defined as that corresponding to a Vt of 15–21 mL. Vt, Peak Inspiratory Pressure (PIP), Leak Percentage (%), Inspiratory Time (Ti, millisecond) and other parameters were recorded using a PC (Dell, Windows V.10) on a custom application (LabView 2014 platform NI, USA). The proportion of breaths achieving target range Vt, other key ventilation parameters and their variability were compared between a generic CE approved bag and mask and a novel FOR (NeoBreathe, Phoenix Medical Systems, India).ResultUsing an SIBM, participants delivered a mean (SD) Vt of 17.52 (5.22) mL, achieving target range Vt in 46.99% of all breaths, with a mean (SD) face-mask leak per cent of 32.51% (22.25). Using the FOR, participants delivered a mean (SD) Vt of 18.31 (3.90), achieving target range Vt in 54.37% of all breaths and a mean (SD) face-mask leak per cent of 18.89% (14.45). Variability of Vt, PIP and leak per cent was significantly reduced with FOR.ConclusionFOR significantly reduced face-mask leak, significantly increased the proportion of breaths achieving Vt within optimal range and could offer a novel alternative to a SIBM.

scholarly journals Comparative bench study evaluation of a modified snorkeling mask used during COVID-19 pandemia and standard interfaces for Non-Invasive Ventilation

2020 ◽  
Author(s):  
Giuliano Ferrone ◽  
Giorgia Spinazzola ◽  
Roberta Costa ◽  
Edoardo Piervincezi ◽  
Antonio Gullì ◽  
...  
Keyword(s):  
Pressure Support ◽  
Peak Inspiratory Pressure ◽  
Face Mask ◽  
Invasive Ventilation ◽  
Emergency Situations ◽  
Non Invasive ◽  
Bench Study ◽  
Non Invasive Ventilation ◽  
And Performance ◽  
Full Face

Abstract Background COVID-19 infection has put enormous pressure on the healthcare systems worldwide and especially on Intensive Care Units (ICUs). In this particular situation, a modified snorkeling mask into a mask for non-invasive continuous positive airway pressure (nCPAP) and non-invasive ventilation (NIV), with the help of 3D printers, has been proposed for clinical use. We designed a bench study to compare a Helmet (H), a Full face mask (RFF) and a modified full face snorkeling mask (MFF) for delivering nCPAP and NIV in pressure support mode (PSV). Methods A mannequin was connected to an active lung simulator. The inspiratory and expiratory variations in airways pressure observed with a high simulated effort (Pmus), were determined relative to the preset CPAP level. NIV was applied in PSV at two simulated respiratory rates and two cycling-off flow thresholds. During the bench study we measured the variables defining patient-ventilator interaction and performance. Results During nCPAP, the MFF presented significantly lower values of ΔPawi and ∆Pawe compared to the other interfaces tested (H and RFF). During NIV, the MFF demonstrated a better patient-ventilator interaction compared to RFF, as shown by significantly shorter Timepress and Delaytrexp (p < 0.01), but no significant differences were found in terms of Delaytrinsp and Timesync between the interfaces tested. At RR 20sim, the MFF presented the shorter ΔPtrigger (p < 0.01), moreover during all the conditions tested the MFF showed the longer PTP 200, 300 and 500 compared to RFF (p < 0.01). A major limitation of MFF is that during NIV with this interface it is possible to reach at maximum 18 cmH2O of peak inspiratory pressure. Over this pressure value, the presence of air leaks determined important asynchrony phenomena. For this reason, our test was limited to one pressure support and PEEP set (PS 10 cmH2O and PEEP 8 cmH2O). Conclusions The modified full face snorkeling mask can be used as an acceptable alternative to other interfaces for both nCPAP and NIV in emergency situations.

scholarly journals Comparative Bench Study Evaluation of a Modified Snorkeling Mask Used During COVID-19 Pandemia and Standard Interfaces for Non-Invasive Ventilation.

2020 ◽  
Author(s):  
GIULIANO FERRONE ◽  
Giorgia Spinazzola ◽  
Roberta Costa ◽  
Edoardo Piervincezi ◽  
Antonio Gullì ◽  
...  
Keyword(s):  
Pressure Support ◽  
Peak Inspiratory Pressure ◽  
Face Mask ◽  
Invasive Ventilation ◽  
Emergency Situations ◽  
Non Invasive ◽  
Bench Study ◽  
Non Invasive Ventilation ◽  
And Performance ◽  
Full Face

Abstract BackgroundCOVID-19 infection has put enormous pressure on the healthcare systems worldwide and especially on Intensive Care Units (ICUs). In this particular situation, a modified snorkeling mask into a mask for non-invasive continuous positive airway pressure (nCPAP) and non-invasive ventilation (NIV), with the help of 3D printers, has been proposed for clinical use. We designed a bench study to compare a Helmet (H), a Full face mask (RFF) and a modified full face snorkeling mask (MFF) for delivering nCPAP and NIV in pressure support mode (PSV).MethodsA mannequin was connected to an active lung simulator. The inspiratory and expiratory variations in airways pressure observed with a high simulated effort (Pmus), were determined relative to the preset CPAP level. NIV was applied in PSV at two simulated respiratory rates and two cycling-off flow thresholds. During the bench study we measured the variables defining patient-ventilator interaction and performance. ResultsDuring nCPAP, the MFF presented significantly lower values of ΔPawi and ∆Pawe compared to the other interfaces tested (H and RFF). During NIV, the MFF demonstrated a better patient-ventilator interaction compared to RFF, as shown by significantly shorter Timepress and Delaytrexp (p<0.01), but no significant differences were found in terms of Delaytrinsp and Timesync between the interfaces tested. At RR 20sim, the MFF presented the shorter ΔPtrigger (p<0.01), moreover during all the conditions tested the MFF showed the longer PTP 200, 300 and 500 compared to RFF (p<0.01). A major limitation of MFF is that during NIV with this interface it is possible to reach at maximum 18 cmH2O of peak inspiratory pressure. Over this pressure value, the presence of air leaks determined important asynchrony phenomena. For this reason, our test was limited to one pressure support and PEEP set (PS 10 cmH2O and PEEP 8 cmH2O).ConclusionsThe modified full face snorkeling mask can be used as an acceptable alternative to other interfaces for both nCPAP and NIV in emergency situations.

scholarly journals Comparative Bench Study Evaluation of a Modified Snorkeling Mask Used During COVID-19 Pandemia and Standard Interfaces for Non-invasive Ventilation.

2020 ◽  
Author(s):  
Giuliano Ferrone ◽  
Giorgia Spinazzola ◽  
Roberta Costa ◽  
Edoardo Piervincezi ◽  
Antonio Gullì ◽  
...  
Keyword(s):  
Pressure Support ◽  
Peak Inspiratory Pressure ◽  
Face Mask ◽  
Invasive Ventilation ◽  
Emergency Situations ◽  
Non Invasive ◽  
Bench Study ◽  
Non Invasive Ventilation ◽  
And Performance ◽  
Full Face

Abstract BackgroundCOVID-19 infection has put enormous pressure on the healthcare systems worldwide and especially on Intensive Care Units (ICUs). In this particular situation, a modified snorkeling mask into a mask for non-invasive continuous positive airway pressure (nCPAP) and non-invasive ventilation (NIV), with the help of 3D printers, has been proposed for clinical use. We designed a bench study to compare a Helmet (H), a Full face mask (RFF) and a modified full face snorkeling mask (MFF) for delivering nCPAP and NIV in pressure support mode (PSV).MethodsA mannequin was connected to an active lung simulator. The inspiratory and expiratory variations in airways pressure observed with a high simulated effort (Pmus), were determined relative to the preset CPAP level. NIV was applied in PSV at two simulated respiratory rates and two cycling-off flow thresholds. During the bench study we measured the variables defining patient-ventilator interaction and performance. ResultsDuring nCPAP, the MFF presented significantly lower values of ΔPawi and ∆Pawe compared to the other interfaces tested (H and RFF). During NIV, the MFF demonstrated a better patient-ventilator interaction compared to RFF, as shown by significantly shorter Timepress and Delaytrexp (p<0.01), but no significant differences were found in terms of Delaytrinsp and Timesync between the interfaces tested. At RR 20sim, the MFF presented the shorter ΔPtrigger (p<0.01), moreover during all the conditions tested the MFF showed the longer PTP 200, 300 and 500 compared to RFF (p<0.01). A major limitation of MFF is that during NIV with this interface it is possible to reach at maximum 18 cmH2O of peak inspiratory pressure. Over this pressure value, the presence of air leaks determined important asynchrony phenomena. For this reason, our test was limited to one pressure support and PEEP set (PS 10 cmH2O and PEEP 8 cmH2O).ConclusionsThe modified full face snorkeling mask can be used as an acceptable alternative to other interfaces for both nCPAP and NIV in emergency situations.

Settlers or Movers? The Temporality of Past Migrations, Political Inaction and its Consequences, 1945–1985

2018 ◽  
Author(s):  
Jozefien De Bock
Keyword(s):  
Temporary Workers ◽  
Guest Workers ◽  
Temporary Migration ◽  
Wide Range ◽  
Settler Societies ◽  
Future Policy ◽  
Set Up ◽  
Legal Frameworks ◽  
Temporary Migrants ◽  
Multicultural Policies

Historically, those societies that have the longest tradition in multicultural policies are settler societies. The question of how to deal with temporary migrants has only recently aroused their interest. In Europe, temporary migration programmes have a much longer history. In the period after WWII, a wide range of legal frameworks were set up to import temporary workers, who came to be known as guest workers. In the end, many of these ‘guests’ settled in Europe permanently. Their presence lay at the basis of European multicultural policies. However, when these policies were drafted, the former mobility of guest workers had been forgotten. This chapter will focus on this mobility of initially temporary workers, comparing the period of economic growth 1945-1974 with the years after the 1974 economic crisis. Further, it will look at the kind of policies that were developed towards guest workers in the era before multiculturalism. This way, it shows how their consideration as temporary residents had far-reaching consequences for the immigrants, their descendants and the receiving societies involved. The chapter will finish by suggesting a number of lessons from the past. If the mobility-gap between guest workers and present-day migrants is not as big as generally assumed, then the consequences of previous neglect should serve as a warning for future policy making.

ORAL HISTORY SOURCES AS LEARNING MATERIALS: A CASE STUDY OF THE NATIONAL UNIVERSITY OF SCIENCE AND TECHNOLOGY

2016 ◽  
Vol 3 (2) ◽  
pp. 82-93
Author(s):  
Gugulethu Shamaine Nkala ◽  
Rodreck David
Keyword(s):  
Oral History ◽  
Learning Experience ◽  
Science And Technology ◽  
Group Discussion ◽  
Human Interaction ◽  
Learning Material ◽  
Wide Range ◽  
National Archives ◽  
National University ◽  
Set Up

Knowledge presented by Oral History (OH) is unique in that it shares the tacit perspective, thoughts, opinions and understanding of the interviewee in its primary form. While teachers, lecturers and other education specialists have at their disposal a wide range of primary, secondary and tertiary sources upon which to relate and share or impart knowledge, OH presents a rich source of information that can improve the learning and knowledge impartation experience. The uniqueness of OH is presented in the following advantages of its use: it allows one to learn about the perspectives of individuals who might not otherwise appear in the historical record; it allows one to compensate for the digital age; one can learn different kinds of information; it provides historical actors with an opportunity to tell their own stories in their own words; and it offers a rich opportunity for human interaction. This article discusses the placement of oral history in the classroom set-up by investigating its use as a source of learning material presented by the National Archives of Zimbabwe to students in the Department of Records and Archives Management at the National University of Science and Technology (NUST). Interviews and a group discussion were used to gather data from an archivist at the National Archives of Zimbabwe, lecturers and students in the Department of Records and Archives Management at NUST, respectively. These groups were approached on the usability, uniqueness and other characteristics that support this type of knowledge about OH in a tertiary learning experience. The findings indicate several qualities that reflect the richness of OH as a teaching source material in a classroom set-up. It further points to weak areas that may be addressed where the source is considered a viable strategy for knowledge sharing and learning. The researchers present a possible model that can be used to champion the use of this rich knowledge source in classroom education at this university and in similar set-ups. 

Nanofiltration of endocrine disrupting compounds

2003 ◽  
Vol 3 (5-6) ◽  
pp. 321-327 ◽  
Author(s):  
M. Gallenkemper ◽  
T. Wintgens ◽  
T. Melin
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Endocrine Disrupting Compounds ◽  
Municipal Wastewater Treatment ◽  
Water And Wastewater Treatment ◽  
Wide Range ◽  
Endocrine Disrupting ◽  
Municipal Wastewater Treatment Plants ◽  
Set Up

Endocrine disrupting compounds can affect the hormone system in organisms. A wide range of endocrine disrupters were found in sewage and effluents of municipal wastewater treatment plants. Toxicological evaluations indicate that conventional wastewater treatment plants are not able to remove these substances sufficiently before disposing effluent into the environment. Membrane technology, which is proving to be an effective barrier to these substances, is the subject of this research. Nanofiltration provides high quality permeates in water and wastewater treatment. Eleven different nanofiltration membranes were tested in the laboratory set-up. The observed retention for nonylphenol (NP) and bisphenol A (BPA) ranged between 70% and 100%. The contact angle is an indicator for the hydrophobicity of a membrane, whose influence on the permeability and retention of NP was evident. The retention of BPA was found to be inversely proportional to the membrane permeability.

scholarly journals Atmospheric Pressure Plasma Deposition of TiO2: A Review

Materials ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 2931
Author(s):  
Soumya Banerjee ◽  
Ek Adhikari ◽  
Pitambar Sapkota ◽  
Amal Sebastian ◽  
Sylwia Ptasinska
Keyword(s):  
Atmospheric Pressure ◽  
Gas Flow ◽  
Plasma Deposition ◽  
Atmospheric Pressure Plasma ◽  
Cost Savings ◽  
Historical Background ◽  
Pressure Plasma ◽  
Wide Range ◽  
The Status ◽  
Deposition Techniques

Atmospheric pressure plasma (APP) deposition techniques are useful today because of their simplicity and their time and cost savings, particularly for growth of oxide films. Among the oxide materials, titanium dioxide (TiO2) has a wide range of applications in electronics, solar cells, and photocatalysis, which has made it an extremely popular research topic for decades. Here, we provide an overview of non-thermal APP deposition techniques for TiO2 thin film, some historical background, and some very recent findings and developments. First, we define non-thermal plasma, and then we describe the advantages of APP deposition. In addition, we explain the importance of TiO2 and then describe briefly the three deposition techniques used to date. We also compare the structural, electronic, and optical properties of TiO2 films deposited by different APP methods. Lastly, we examine the status of current research related to the effects of such deposition parameters as plasma power, feed gas, bias voltage, gas flow rate, and substrate temperature on the deposition rate, crystal phase, and other film properties. The examples given cover the most common APP deposition techniques for TiO2 growth to understand their advantages for specific applications. In addition, we discuss the important challenges that APP deposition is facing in this rapidly growing field.

scholarly journals A System-Agnostic, Adaptable and Extensible Animal Support Cradle System for Cardio-Respiratory-Synchronised, and Other, Multi-Modal Imaging of Small Animals

Tomography ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 39-54
Author(s):  
Veerle Kersemans ◽  
Stuart Gilchrist ◽  
Philip Danny Allen ◽  
Sheena Wallington ◽  
Paul Kinchesh ◽  
...  
Keyword(s):  
Scientific Data ◽  
Cardiac Monitoring ◽  
Small Animals ◽  
Maintenance System ◽  
Wide Range ◽  
Set Up ◽  
Animal Handling ◽  
Imaging Performance ◽  
Significant Effort

Standardisation of animal handling procedures for a wide range of preclinical imaging scanners will improve imaging performance and reproducibility of scientific data. Whilst there has been significant effort in defining how well scanners should operate and how in vivo experimentation should be practised, there is little detail on how to achieve optimal scanner performance with best practices in animal welfare. Here, we describe a system-agnostic, adaptable and extensible animal support cradle system for cardio-respiratory-synchronised, and other, multi-modal imaging of small animals. The animal support cradle can be adapted on a per application basis and features integrated tubing for anaesthetic and tracer delivery, an electrically driven rectal temperature maintenance system and respiratory and cardiac monitoring. Through a combination of careful material and device selection, we have described an approach that allows animals to be transferred whilst under general anaesthesia between any of the tomographic scanners we currently or have previously operated. The set-up is minimally invasive, cheap and easy to implement and for multi-modal, multi-vendor imaging of small animals.

scholarly journals LED Rail Signals: Full Hardware Realization of Apparatus with Independent Intensity by Temperature Changes

Electronics ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1291
Author(s):  
Giuseppe Schirripa Schirripa Spagnolo ◽  
Fabio Leccese
Keyword(s):  
Temperature Sensor ◽  
Energy Efficient ◽  
Light Emitting Diode ◽  
Junction Temperature ◽  
Light Emitting ◽  
Temperature Changes ◽  
Wide Range ◽  
International Regulations ◽  
Long Lifetime ◽  
Set Up

Nowadays, signal lights are made using light-emitting diode arrays (LEDs). These devices are extremely energy efficient and have a very long lifetime. Unfortunately, especially for yellow/amber LEDs, the intensity of the light is closely related to the junction temperature. This makes it difficult to design signal lights to be used in naval, road, railway, and aeronautical sectors, capable of fully respecting national and international regulations. Furthermore, the limitations prescribed by the standards must be respected in a wide range of temperature variations. In other words, in the signaling apparatuses, a system that varies the light intensity emitted according to the operating temperature is useful/necessary. In this paper, we propose a simple and effective solution. In order to adjust the intensity of the light emitted by the LEDs, we use an LED identical to those used to emit light as a temperature sensor. The proposed system was created and tested in the laboratory. As the same device as the ones to be controlled is used as the temperature sensor, the system is very stable and easy to set up.

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