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Niu H, Zhu Z, Hu D, Ma S, Li R, Yuan S, Ye J, Jin H. [Research and Development Trend of Medical Oxygen Production Equipment]. Zhongguo Yi Liao Qi Xie Za Zhi 2023; 47:294-297. [PMID: 37288631 DOI: 10.3969/j.issn.1671-7104.2023.03.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Oxygen therapy is an effective clinical method for the treatment of respiratory disorders, oxygen concentrator as a necessary medical auxiliary equipment in hospitals, its research and development has been a hot spot. The study reviewed the development history of the ventilator, introduced the two preparation technique of the oxygen generator pressure swing absorption (PSA) and vacuum pressure swing adsorption (VPSA), and analyzed the core technology development of the oxygen generator. In addition, the study compared some major brands of oxygen concentrators on the market and prospected the development trend of oxygen concentrators.
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Affiliation(s)
- Hangduo Niu
- Shenzhen Key Laboratory for Biomedical Engineering, Shenzhen, 518000
- School of Biomedical Engineering, Health Science center, Shenzhen University, Shenzhen, 518000
| | - Zifu Zhu
- Shenzhen Key Laboratory for Biomedical Engineering, Shenzhen, 518000
- School of Biomedical Engineering, Health Science center, Shenzhen University, Shenzhen, 518000
| | - Dandan Hu
- School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096
| | - Shengcai Ma
- Shenzhen Key Laboratory for Biomedical Engineering, Shenzhen, 518000
- School of Biomedical Engineering, Health Science center, Shenzhen University, Shenzhen, 518000
| | - Ruowei Li
- Shenzhen Key Laboratory for Biomedical Engineering, Shenzhen, 518000
- School of Biomedical Engineering, Health Science center, Shenzhen University, Shenzhen, 518000
| | - Sinian Yuan
- Shenzhen Key Laboratory for Biomedical Engineering, Shenzhen, 518000
- School of Biomedical Engineering, Health Science center, Shenzhen University, Shenzhen, 518000
| | - Jilun Ye
- Shenzhen Key Laboratory for Biomedical Engineering, Shenzhen, 518000
- School of Biomedical Engineering, Health Science center, Shenzhen University, Shenzhen, 518000
| | - Hao Jin
- Hunan Techray Medical Technology Co. Ltd., Changsha, 410035
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Jain V, Bhatia V. Out of breath in pandemic - Is pressure swing adsorption (PSA) technology a solution for saving lives? J Family Med Prim Care 2023; 12:426-429. [PMID: 37122661 PMCID: PMC10131955 DOI: 10.4103/jfmpc.jfmpc_886_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 07/29/2021] [Accepted: 12/14/2022] [Indexed: 05/02/2023] Open
Abstract
In these unprecedented times of COVID-19 pandemic, globally there has been a shortage of medical supplies, hospital beds, health care workers, etc. This was accentuated in India with a shortage of oxygen in the second wave of pandemic. The reasons for shortage were mainly imbalance between demand-supply and these also led to implementation of ingenious solutions in the form of oxygen generators based on PSA technology. The technology was an off shot from OBOGS developed by DRDO and DEBEL for light combat military air crafts. This review discusses the scientific technology behind medical oxygen plants based on PSA, its applications and its advantages to combat the dearth of oxygen.
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Affiliation(s)
- Vishakha Jain
- Department of Medicine, AIIMS, Hyderabad, Telangana, India
- Address for correspondence: Dr. Vishakha Jain, Department of Medicine, AIIMS, Hyderabad, Telangana, India. E-mail:
| | - Vikas Bhatia
- Department of Medicine, AIIMS, Hyderabad, Telangana, India
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Mizukami Y, Takahashi Y, Shimizu K, Konishi S, Takakura Y, Nishikawa M. Calcium Peroxide-Containing Polydimethylsiloxane-Based Microwells for Inhibiting Cell Death in Spheroids through Improved Oxygen Supply. Biol Pharm Bull 2021; 44:1458-1464. [PMID: 34602554 DOI: 10.1248/bpb.b21-00269] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Multicellular spheroids are expected to be used for in vivo-like tissue models and cell transplantation. Microwell devices are useful for the fabrication of multicellular spheroids to improve productivity and regulate their size. However, the high cell density in microwell devices leads to accelerated cell death. In this study, we developed O2-generating microwells by incorporating calcium peroxide (CaO2) into polydimethylsiloxane (PDMS)-based microwells. The CaO2-containing PDMS was shown to generate O2 for 3 d. Then, CaO2-containing PDMS was used to fabricate O2-generating microwells using a micro-molding technique. When human hepatocellular carcinoma (HepG2) spheroids were prepared using the conventional microwells, the O2 concentration in the culture medium reduced to approx. 67% of the cell-free level. In contrast, the O2-generating microwells maintained O2 at constant levels. The HepG2 spheroids prepared using the O2-generating microwells had a larger number of live cells than those prepared using the conventional microwells. In addition, the O2-generating microwells rescued hypoxia in the HepG2 spheroids and increased cell viability. Lastly, the O2-generating microwells were also useful for the preparation of multicellular spheroids of other cell types (i.e., MIN6, B16-BL6, and adipose-derived stem cells) with high cell viability. These results showed that the O2-generating microwells are useful for preparing multicellular spheroids with high cell viability.
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Affiliation(s)
- Yuya Mizukami
- Department of Biopharmaceutics and Drug Metabolism, Graduate School of Pharmaceutical Sciences, Kyoto University
| | - Yuki Takahashi
- Department of Biopharmaceutics and Drug Metabolism, Graduate School of Pharmaceutical Sciences, Kyoto University
| | - Kazunori Shimizu
- Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University
| | - Satoshi Konishi
- Department of Mechanical Engineering, Graduate School of Science and Engineering, Ritsumeikan University
| | - Yoshinobu Takakura
- Department of Biopharmaceutics and Drug Metabolism, Graduate School of Pharmaceutical Sciences, Kyoto University
| | - Makiya Nishikawa
- Department of Biopharmaceutics and Drug Metabolism, Graduate School of Pharmaceutical Sciences, Kyoto University.,Laboratory of Biopharmaceutics, Faculty of Pharmaceutical Sciences, Tokyo University of Science
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Li X, Liang M, Jiang S, Cao S, Li S, Gao Y, Liu J, Bai Q, Sui N, Zhu Z. Pomegranate-Like CuO 2@SiO 2 Nanospheres as H 2O 2 Self-Supplying and Robust Oxygen Generators for Enhanced Antibacterial Activity. ACS Appl Mater Interfaces 2021; 13:22169-22181. [PMID: 33973462 DOI: 10.1021/acsami.1c02413] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Reactive oxygen species (ROS)-induced nanosystems represent one of the most essential, efficient, and encouraging nanobactericides for eliminating bacterial infection concerning the increasing resistance threats of existing antibiotics. Among them, Fenton-type metal peroxide nanoparticles are exciting nanomaterials with intriguing physiochemical properties, yet the study of this antimicrobial agent is still in its infancy. Herein, a robust pH-responsive Fenton nanosystem is constructed by the assembly of copper peroxide nanodots in pomegranate-like mesoporous silica nanoshells (CuO2@SiO2) that are capable of self-supplying H2O2 and sustainably generating O2. The enhanced antimicrobial performance is attributed to the pH responsiveness and excellent Fenton catalytic activity through either the Cu2+-catalyzed conversion of H2O2 to detrimental ROS under acid treatment or in situ O2 evolution in neutral media. Moreover, in vitro and in vivo investigations demonstrate that this nanocomposite can exhibit boosted antimicrobial capabilities and can significantly accelerate skin wound closure, while retaining outstanding cytocompatibility and hemocompatibility. Given its excellent physicochemical and antimicrobial properties, the broad application of this nanocomposite in bacteria-associated wound management is anticipated.
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Affiliation(s)
- Xiang Li
- College of Materials Science and Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Rd., Qingdao, Shandong 266042, China
| | - Manman Liang
- College of Materials Science and Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Rd., Qingdao, Shandong 266042, China
| | - Shulong Jiang
- College of Materials Science and Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Rd., Qingdao, Shandong 266042, China
| | - Shiya Cao
- College of Materials Science and Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Rd., Qingdao, Shandong 266042, China
| | - Siheng Li
- Department of Chemistry, University of Houston, 4800 Calhoun Rd., Houston, Texas 77204, United States
| | - Yubo Gao
- College of Materials Science and Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Rd., Qingdao, Shandong 266042, China
| | - Jing Liu
- College of Materials Science and Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Rd., Qingdao, Shandong 266042, China
| | - Qiang Bai
- College of Materials Science and Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Rd., Qingdao, Shandong 266042, China
| | - Ning Sui
- College of Materials Science and Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Rd., Qingdao, Shandong 266042, China
| | - Zhiling Zhu
- College of Materials Science and Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Rd., Qingdao, Shandong 266042, China
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Calori IR, Bi H, Tedesco AC. Expanding the Limits of Photodynamic Therapy: The Design of Organelles and Hypoxia-Targeting Nanomaterials for Enhanced Photokilling of Cancer. ACS Appl Bio Mater 2021; 4:195-228. [PMID: 35014281 DOI: 10.1021/acsabm.0c00945] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Photodynamic therapy (PDT) is a minimally invasive clinical protocol that combines a nontoxic photosensitizer (PS), appropriate visible light, and molecular oxygen for cancer treatment. This triad generates reactive oxygen species (ROS) in situ, leading to different cell death pathways and limiting the arrival of nutrients by irreversible destruction of the tumor vascular system. Despite the number of formulations and applications available, the advancement of therapy is hindered by some characteristics such as the hypoxic condition of solid tumors and the limited energy density (light fluence) that reaches the target. As a result, the use of PDT as a definitive monotherapy for cancer is generally restricted to pretumor lesions or neoplastic tissue of approximately 1 cm in size. To expand this limitation, researchers have synthesized functional nanoparticles (NPs) capable of carrying classical photosensitizers with self-supplying oxygen as well as targeting specific organelles such as mitochondria and lysosomes. This has improved outcomes in vitro and in vivo. This review highlights the basis of PDT, many of the most commonly used strategies of functionalization of smart NPs, and their potential to break the current limits of the classical protocol of PDT against cancer. The application and future perspectives of the multifunctional nanoparticles in PDT are also discussed in some detail.
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Affiliation(s)
- Italo Rodrigo Calori
- Department of Chemistry, Center of Nanotechnology and Tissue Engineering, Photobiology and Photomedicine Research Group, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo-Ribeirão Preto, São Paulo 14040-901, Brazil
| | - Hong Bi
- School of Chemistry and Chemical Engineering, Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, 111 Jiulong Road, Hefei 230601, China
| | - Antonio Claudio Tedesco
- Department of Chemistry, Center of Nanotechnology and Tissue Engineering, Photobiology and Photomedicine Research Group, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo-Ribeirão Preto, São Paulo 14040-901, Brazil.,School of Chemistry and Chemical Engineering, Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, 111 Jiulong Road, Hefei 230601, China
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