Subjects: Physics >> Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics submitted time 2022-08-30
Abstract： Periodic optical systems, such as photonic crystals and optical metamaterials, can localize high-density electromagnetic field energy at subwavelength scales and obtain extremely small mode volumes, so they have great application potential in the field of light manipulation. In recent years, a strong interaction between light and matter in periodic optical systems has been discovered, which is called bound states in continuum (BIC). Optics BICs are special electromagnetic eigenstates those frequencies lie in the radiation continuum but are completely localized, and have shown interesting physics and rich application scenarios. This paper systematically reviews the classification and theory of BICs in periodic optical systems, and summarizes their basic physical properties and the latest application development. BICs in periodic optical systems are injecting new impetus into the fields of integrated optics, information optics, bio-optics, topological optics, and nonlinear optics.
Peer Review Status:
Awaiting Review
Subjects: Nursing >> Nursing submitted time 2022-08-17
Abstract： Objective To observe the effect of auricular acupoint sticking and pressing therapy on preventing postoperative nausea and vomiting in patients undergoing thoracolumbar surgery under general anesthesia. Methods To retrospectively analysis the clinical data of 126 patients who underwent posterior thoracolumbar surgery under general anesthesia, including 37 patients who underwent auricular point sticking and pressing 24 hours before surgery (group A), 48 patients who underwent auricular point sticking and pressing after surgery(group B) and 41 patients without auricular acupoint sticking and pressing therapy after operation (group C). Incidence of postoperative nausea and vomiting and PONV scores were recorded at 8 h, 24 h and 48 h after operation. Results Among the three groups of patients, group A had the lowest incidence of postoperative nausea and vomiting, and the lowest PONV score. The incidence of PONV at 48h after operation was 35.13%, which was significantly lower than that in the group C（P<0.05）. Compared with group C, PONV condition were improved to some extent in group B, and the incidence of PONV at 8h, 24h, and 48h after operation were 41.67%, 47.92%, and 35.42%, respectively，lower than those in the group C（P<0.05）. There was no significant difference in the incidence and PONV score between group A and group B （P＞0.05）. Conclusion Auricular acupoint sticking and pressing therapy in perioperative period can reduce the incidence of postoperative nausea and vomiting in patients with thoracolumbar surgery, and reduce the incidence of related complications. However, the incidence of postoperative nausea and vomiting was still high after implementation of auricular acupoint sticking and pressing therapy alone.
Peer Review Status:Awaiting Review
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