Medical Gas Research

No abstract text is available yet for this article.

No abstract text is available yet for this article.

Mask use during the coronavirus disease 2019 (COVID-19) pandemic has been widely recommended and mandated worldwide. However, there is a lack of comprehensive research on the potential adverse health effects of mask usage. This study aimed to investigate and evaluate the negative effects of surgical mask use on scientifically proven cardiopulmonary functions in undergraduate and associate degree students, as well as its impact on coronaphobia. A total of 145 volunteer university students (49 males, 96 females, with a mean age of 20 years) were enrolled in the study, which consisted of two 120-minute sessions...

Until the availability of an effective and practical vaccine, there is a serious need to recognize alternative treatments for coronavirus disease 2019 (COVID-19). This study aimed to determine whether major ozonated autohemotherapy (MOAH) can improve the clinical and paraclinical parameters in critically-ill patients with COVID-19 requiring mechanical ventilation. In this controlled trial, we enrolled 40 critically ill COVID-19 patients receiving invasive mechanical ventilation. The enrolled patients were then randomized into the MOAH and control groups...

Simultaneous ventilation of two patients may lead to hypoventilation in one patient and hyperinflation in the other patient. In a simulation of ventilation in two patients using artificial lungs, we voluntarily directed gas flow to one patient by using three-dimensional-printed Y-adapters and stenosis adapters during volume- and pressure-controlled ventilation in the first set up. We continuously modified the model using a special one-way valve on the flow-limited side and measured it in pressure-controlled ventilation with the flow sensor of the ventilator adjusted on both sides in a second and third setup...

Postoperative sore throat is one well-recognized complication, occurring most frequently following tracheal intubation. Effective prevention of postoperative sore throat has been recognized as a top priority, bringing pleasant feelings and satisfaction to patients. This study aimed to assess the efficacy of magnesium sulfate, dexmedetomidine and ondansetron gargle with lidocaine administrated prior to laryngoscopy and tracheal intubation for postoperative sore throat prevention alongside hemodynamic management...

Hydrogen is a simple, colorless, and biologically active small molecule gas that can react with reactive oxygen species. Recent research suggests that hydrogen possesses several biological effects, including antioxidant, anti-inflammatory, and anti-apoptotic effects, while exhibiting an extremely high level of safety. Hydrogen application has shown promise in treating a range of acute and chronic diseases, both benign and malignant. Importantly, an increasing number of clinical studies on hydrogen have demonstrated its efficacy and safety in treating various diseases...

Nitric oxide (NO), a gaseous free radical produced from L-arginine catalyzed by NO synthase, functions as an important signaling molecule in the human body. Its antiviral activity was confirmed in the 1990s, and has been studied more extensively since the outbreak of the SARS pandemic in 2003. In the fight against the ongoing severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, some recent studies have revealed the potential of NO in the treatment of coronavirus disease 2019 (COVID-19). The progress in this field, including several noteworthy clinical trials of inhaled NO for the treatment of COVID-19 and the emergency approval of NO nasal spray by the regulatory agencies of Israel, Bahrain, Thailand and Indonesia for the treatment of COVID-19 pneumonia, offers a new perspective for addressing the raging coronavirus infection and greatly broadens the clinical application of NO therapy...

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The effect of olfactory bulb lesions on the induction time of sevoflurane has never been studied. We aimed to investigate this issue. In this study, we found that the volume of olfactory bulbs and the pore of the fila olfactoria were significantly lower with the fibrosis of olfactory bulbs in animals subjected to olfactory bulbectomy. Volatile anesthetics induction times were measured in all groups. Prolonged induction was observed in olfactory bulbectomy group. It was concluded that increased induction times of sevoflurane may be due to the olfactory bulb lesion...

Nitrous oxide (N2 O) is a unique anesthetic agent that has both advantages and disadvantages, especially in neurosurgical patients. Various studies evaluating the use of N2 O in different surgical populations have been inconclusive so far. In this prospective, single-blinded, randomized study, 50 patients of either sex, aged 18-60 years, were enrolled and randomly allocated into N2 O or N2 O free group. Data including demographics, intraoperative vitals, blood gases, intravenous fluids, anesthetic drug consumption, brain condition, emergence and recovery time, duration of surgery and anesthesia, duration of postoperative ventilation, perioperative complications, condition at discharge, and duration of intensive care unit & hospital stay were recorded...

Postoperative shivering is one of the most common complications of surgeries. The current research compared the effects of ketamine, granisetron, and dexmedetomidine on reducing postoperative shivering after general anesthesia. This double-blind clinical trial enrolled 148 patients (39.08 ± 5.99 years old) who had been admitted to Vali-Asr Hospital of Arak, Iran in 2019-2021. The study drugs, including dexmedetomidine, ketamine, granisetron and normal saline, were administered in corresponding groups 30 minutes before the end of surgery...

Postherpetic neuralgia (PHN) seriously affects the quality of life of the elderly population. This study aimed to evaluate the efficacy of ozonated autohemotherapy (O3 -AHT) combined with pulsed radiofrequency (PRF) in the treatment of thoracic PHN in older adults. The medical records of patients with thoracic PHN aged 65 years and older from June 2018 until March 2021 in Shengli Oilfield Central Hospital were reviewed. They were assigned into two groups: PRF alone (PRF group, n = 107) and PRF combined with O3 -AHT (PRF + O3 -AHT group, n = 109)...

Spinal pain is recognized as the most common cause of disability, work absenteeism and need of healthcare services worldwide. Although many strategies have been developed for conservative treatment of spinal pain, its increasing prevalence diagnosis highlights the need for new treatments. Oxygen-ozone (O2 -O3 ) therapy is considered to be an alternative therapy due to its analgesic and anti-inflammatory effects. This retrospective study evaluated the effects of O2 -O3 intramuscular paravertebral injections in 76 patients with chronic neck pain or low back pain, in terms of pain and disability reduction, quality of life improvement, and analgesic drug intake...

Sevoflurane has become an important volatile anesthetic in clinic and has been widely studied in recent years. Numerous studies have demonstrated the efficacy of sevoflurane in safeguarding against brain damage across various domains. For example, it has played a neuroprotective role in subarachnoid hemorrhage (SAH), traumatic brain injury, and ischemia/reperfusion injury. The ensuing critique will focus on the significance of sevoflurane in experimental SAH and shed light on the underlying mechanisms. The findings of the current investigation demonstrate that sevoflurane possesses neuroprotective capabilities and clarify that it effectively attenuates secondary damage resulting from SAH through anti-inflammatory and anti-apoptotic pathways...

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Most of the drugs used in modern medical treatments are symptomatic treatments and are far from being a cure for the diseases. The adverse effects are unavoidable in the drugs in modern medical treatments. Molecular hydrogen (H2 ) has a remarkable therapeutic effect on various diseases, and many clinical studies have reported that H2 has no adverse effects. Therefore, H2 is a novel medical gas that is outside the concept of modern medical treatment. H2 , unlike drugs, works on the root of many diseases by scavenging the two kinds of strong reactive oxygen species, hydroxyl radical (·OH) and peroxynitrite (ONOO- )...

Acute kidney injury (AKI) is the major complication of rhabdomyolysis (RM) clinically, which is usually mimicked by glycerol injection in basic research. Oxidative stress, inflammatory response and apoptosis are recognized to play important roles in development of this disease. Recently, numerous studies have reported the therapeutic effects of molecular hydrogen (H2 ) on oxidative stress and inflammation-related diseases. Here, the effects of H2 against glycerol-induced AKI and the underlying mechanisms were explored in rats...

Diabetic peripheral neuropathy (DPN) is a complex disorder caused by long-standing diabetes. Oxidative stress was considered the critical creed in this DPN pathophysiology. Hydrogen has antioxidative effects on diabetes mellitus and related complications. However, there is still no concern on the beneficial effects of hydrogen in DPN. This paper aimed to evaluate the effects of exogenous hydrogen to reduce the severity of DPN in streptozotocin-induced diabetic rats. Compared with hydrogen-rich saline treatment, hydrogen inhalation significantly reduced blood glucose levels in diabetic rats in the 4th and 8th weeks...

Therapeutic use of ozone is becoming increasingly prevalent worldwide. New methods of administration are emerging. One of these emerging techniques, which we refer to as ozone dialysis, uses a dialysis membrane that allows blood to flow against a countercurrent of ozone gas. We found that ozone uptake by continuous countercurrent blood flow is at least 3 times higher than any comparable form of blood ozone administration currently available. This is the first quantitative report of ozone uptake by blood using the ozone dialysis technique...