Wavelet Transform Image Enhancement Algorithm-Based Evaluation of Lung Recruitment Effect and Nursing of Acute Respiratory Distress Syndrome by Ultrasound Image.

Guanhua Xu,Ling Dai,Xuhua Huang,Jianfei Sun,Enas Abdulhay,Wangyan Jin,Liuyan Ge,Chunhong Qu

doi:10.1155/2021/8960465

Abstract

This study aimed to analyze the application of ultrasound images of lung recruitment (LR) nursing treatment guided by positive-end expiratory pressure (PEEP) in patients with acute respiratory distress syndrome (ARDS). An ultrasound image enhancement algorithm (UIEA) wavelet transform (WT) was constructed, and the soft threshold (ST) and adjacent region average (ARA) were introduced for simulation comparison. In addition, the signal-to-noise ratio (SNR), peak signal-to-noise ratio (PSNR), and running time were undertaken as the evaluation indexes. The WT algorithm was applied to the ultrasound images of 85 ARDS patients before and after PEEP recruitment. The mean artery pressure (MAP), heart rate (HR), and central venous pressure (CVP), peak inspiratory pressure (Ppeak), mean inspiratory pressure (Pmean), dynamic lung compliance (DLC), PCO2, and PaO2/FiO2 of the patients were recorded before and after the LR. The results showed that the signal-to-noise ratio (SNR) (19.67 ± 3.15 dB) and PSNR (23.08 ± 2.08 dB) of the images enhanced by the WT algorithm were much higher than those of ST (13.88 ± 2.74 dB and 14.62 ± 1.76 dB, respectively) and ARA (14.96 ± 3.06 dB and 15.11 ± 1.94 dB, respectively), while the running time was in adverse (P < 0.05); the HR and CVP of patients after LR nursing treatment were increased greatly, while the MAP was in the opposite case (P < 0.05); after LR nursing treatment, Ppeak, Pmean, DLC, PCO2, and PaO2/FiO2 of the patient were significantly greater than those before the LR, and the difference was statistically significant (P < 0.05). In short, the WT algorithm not only enhanced the quality of ultrasound images but also shortened the running time and improved the processing efficiency. PEEP LR nursing treatment could effectively improve the vascular patency, cardiac ejection capacity, and DLC in patients with ARDS, thereby increasing the airway pressure and maintaining the unobstructed expiration.

Highlights

acute respiratory distress syndrome (ARDS) refers to the diffuse damage caused by lung capillary endothelial cells and alveolar epithelial cells in the process of noncardiac diseases such as severe infection, shock, high-risk surgery, trauma, and burns
Its typical physiological changes include reduced lung volume, reduced compliance, and imbalanced ventilation/blood flow ratio. us, how to realize the protective ventilation of lung is essential to improve the respiratory function of the patient [14]. erefore, an ultrasound image enhancement algorithm (UIEA) wavelet transform (WT) was constructed based on WT, and the soft threshold (ST) and ARA were introduced for comparison and analysis. e results showed that the signal-to-noise ratio (SNR) and peak signal-to-noise ratio (PSNR) of the WT algorithm for lung ultrasound image reconstruction were much higher than those of the ARA algorithm and the STalgorithm (P < 0.05), which was similar to the research results of Bein et al (2016) [15]
Us, it indicated that the WT algorithm constructed in this study had better performance in denoising ultrasound images and reducing the influence of artifacts and noises. e running time of the ST algorithm for lung ultrasound image reconstruction was obviously longer than that of the ARA algorithm and the WT algorithm (P < 0.05), which indicated that the WT algorithm based on WT was very rapid for ultrasound images. erefore, the WT algorithm enhanced the quality of ultrasound images and shortened the running time and improved the processing efficiency [16]

Summary

Introduction

ARDS refers to the diffuse damage caused by lung capillary endothelial cells and alveolar epithelial cells in the process of noncardiac diseases such as severe infection, shock, high-risk surgery, trauma, and burns. It is more urgent to correct the severe hypoxia of the patient in time to win precious time for the treatment of underlying diseases [4]. PEEP nursing scheme is mainly adopted to treat patients with ARDS, mainly by expanding the trachea and closing the alveoli, reducing the static blood shunt in the lungs, and improving the ventilation/blood flow ratio and diffusion function, thereby improving the respiratory function of patient [5]. Erefore, PEEP nursing scheme was used in this study to treat the ARDS patients PEEP nursing scheme is mainly adopted to treat patients with ARDS, mainly by expanding the trachea and closing the alveoli, reducing the static blood shunt in the lungs, and improving the ventilation/blood flow ratio and diffusion function, thereby improving the respiratory function of patient [5]. erefore, PEEP nursing scheme was used in this study to treat the ARDS patients

Methods

Results

Discussion

Conclusion