Journal of Intensive and Critical Care Open Access

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Commentary Article - (2022) Volume 8, Issue 11

Rapid Sampling and Determination of Phthalate Esters in Indoor Air using Needle Trap Device
Zhipeng Bai*
Department of Environmental and Occupational Health Sciences, University of Washington, USA
*Correspondence: Zhipeng Bai, Department of Environmental and Occupational Health Sciences, University of Washington, USA, Email:

Received: 01-Nov-2022, Manuscript No. IPJICC-22-15139; Editor assigned: 03-Nov-2022, Pre QC No. IPJICC-22-15139 (PQ); Reviewed: 17-Nov-2022, QC No. IPJICC-22-15139; Revised: 22-Nov-2022, Manuscript No. IPJICC-22-15139 (R); Published: 29-Nov-2022, DOI: 10.35248/2471-8505.22.8.112


Air pockets are an important cause of hyper permeable lungs. Air trapping has the effect of dilating alveoli, compressing capillaries and arterioles, and reducing pulmonary blood flow. However, this is arguably an oversimplification of the pathological mechanism by which air pockets lead to reduced pulmonary vessel size. Acute asthma attacks are one of the most striking examples of transient air trapping. It is well known that bronchial asthma usually causes few radiographic abnormalities, except during acute attacks. Acute bronchiolitis is another important cause of diffuse air entrapment, but primarily a disease of the pediatric age group. In either situation, the airlock is temporary. Air entrapment is confirmed by tests performed during the expiratory phase of respiration. One of its typical imaging patterns is mosaic attenuation. In the classical representation, the lung appears normal during inspiration, but during expiration, the diseased part of the lung, which has lost connective tissue, remains transparent, while the healthy part of the lung becomes denser due to atelectasis. This is a mosaic due to patchy fibrosis that occurs in nonspecific interstitial pneumonia and early-onset interstitial pneumonia without inspiratory-expiratory changes (a classic imaging diagnosis of interstitial lung disease). Helps distinguish from attenuation. Expired volume is measured by pulmonary function tests or simple spirometry, resulting in increased residual volume and forced expiratory volume. Air pockets are often diagnosed incidentally on Computed Tomography (CT) scans. Air pockets represent poorly ventilated lungs, but are themselves clinically benign. This is a common problem for smokers who scuba dive. When you dive, the volume of your lungs shrinks, pushing air into poorly ventilated areas. Ascending from great depths expands these air-trapped areas of the lungs. This puts a lot of pressure on the lung tissue and can rupture it. The most commonly used technique to assess air entrapment is post-expiratory thin-section CT. Each post-expiratory image should be compared to the inspiratory image closest to that level to detect air entrapment. A dynamic expiratory maneuver performed during a helical CT acquisition is described. This slightly increases the degree of exhalation and improves the detection of air trapping. This technique is recommended when patients have difficulty performing adequate expiratory maneuvers. The use of MDCT with thin collimation over the lungs and soft tissue cores with low or very low dose or filtered back projection with iterative reconstruction reduced the prominence and apparent degree of air entrapment at many centers. It is done on a daily basis to improve. SBNT was performed on the same day, just before the CT scan. This test was used specifically to look for small airway abnormalities. This test was performed with the Vmax apparatus (Vmax; Sensomedics, Yorba Linda, CA, 2000) under the expert supervision of a clinical physiologist (MH) blinded to CT results. USA) was performed using Subjects were asked to breathe slowly and deeply until residual capacity was reached. He was then instructed to inhale as deeply as possible to obtain total lung capacity, at which point the breathing valve began to deliver 100% O2 gas. Subjects were then asked to exhale immediately at a flow rate of 0.3 L/s-0.5 L/s. This provided visual feedback on the computer screen to help me follow the steps correctly. Partial exhaled nitrogen concentration was plotted against exhaled volume. This helped determine the closing volume and slope of this relationship when it reached a plateau known as the phase III nitrogen slope (delta N2 or dN2).



Conflict Of Interest

The authors declare no conflict of interest.

Citation: Bai Z (2022) Rapid Sampling and Determination of Phthalate Esters in Indoor Air using Needle Trap Device. J Intensive Crit Care. 8:112.

Copyright: © 2022 Bai Z. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.