Abstract：
BACKGROUND:Inner retinal oxygenation response (ΔPO(2)) is a worldwide study focus. However, the relevant reports on its radiological measurements are limited. In this study, magnetic resonance imaging (MRI), employing T1 weighted image (T1WI), was used to detect changes in ΔPO(2) following 100% oxygen inhalation in human subjects. METHODS:MRI was performed on a 1.5-T GE scanner system. After obtaining ophthalmologic data, eleven healthy individuals were given room air and 100% oxygen inhalation in order with different intervals. The MRI T1WI data were collected for 50 minutes. Data were analyzed with NIH IMAGE software. RESULTS:ΔPO(2) was not panretinally uniform, and changes in oxygenation response were spatially inhomogeneous. During the initial phase (before 5 minutes) of 100% oxygen inhalation, preretinal vitreous water signals in the region of papilla optica increased rapidly. On the contrary, in other regions signals declined. In a later period (35 minutes), ΔPO(2) was panretinally fluctuated and increased slowly and attained homeostasis. After hyperoxia (45 minutes), delayed-enhancement of preretinal vitreous water signals in regions other than the papilla optica occurred, and then dropped down. There was no significant difference (P > 0.05) at any consecutive time point during and after hyperoixa. CONCLUSIONS:These results reveal that hyperoxia can induce region-specific signal changes in preretinal vitreous water. Regulatory activity of the retinal vessel network may be the mechanism during 100% oxygen inhalation. Moreover, MRI is a valuable tool for investigating ΔPO(2) and exploring the mechanism of retinal oxygenation response physiologically or pathologically in vivo.
journal_name
Chin Med J (Engl)journal_title
Chinese medical journalauthors
Xu QG,Chen QH,Xian JF,Wang ZCsubject
Has Abstractpub_date
2010-11-01 00:00:00pages
3277-81issue
22eissn
0366-6999issn
2542-5641journal_volume
123pub_type
杂志文章abstract：OBJECTIVE:To evaluate the use of oxygen in neonates in the past, present and future. DATA SOURCES:The data are mainly from Pubmed with relevant published articles from the 1940s to the present with some information gathered from web searches. STUDY SELECTION:Studies evaluating the use of oxygen in premature and term ...
journal_title：Chinese medical journal
pub_type： 杂志文章,评审
doi：
更新日期：2010-10-01 00:00:00
abstract：OBJECTIVE:To isolate and clone the tumor suppressor gene on chromosomal region 7q32 correlated with the carcinogenesis of human nasopharyngeal carcinoma (NPC). METHODS:The genotypes of polymorphic microsatellite markers on 7q32 in DNA from 24 biopsies of nasopharyngeal carcinoma and matched normal blood cells were ide...
journal_title：Chinese medical journal
pub_type： 杂志文章
doi：
更新日期：2000-07-01 00:00:00
abstract：BACKGROUND:Monolayer cell culture models are the traditional culture models used for in vitro research of pancreatic carcinoma chemosensitivity. However, these models neglect the interactions between tumor cells and the impact of the tumor microenvironment. Such tumor cell monolayers poorly mimic the solid tumor microe...
journal_title：Chinese medical journal
pub_type： 杂志文章
doi：
更新日期：2010-07-01 00:00:00
abstract：:Twin pregnancy with mosaic partial hydatidiform mole (PHM) and survival of two healthy fetuses following in vitro fertilization and embryos transfer (IVF-ET) is a rare situation and is considered a challenge for management. A 32-year-old Chinese woman conceived twin pregnancy following IVF-ET. At 22 weeks' gestation, ...
journal_title：Chinese medical journal
pub_type： 杂志文章
doi：
更新日期：2012-12-01 00:00:00
abstract：BACKGROUND:Associations between glutamine (Gln) enriched nutrition support and surgical patients with gastrointestinal (GI) tumor remain controversy. The purpose of this meta-analysis was to assess the effect of Gln enriched nutrition support on surgical patients with GI tumor in term of relevant biochemical indices, i...
journal_title：Chinese medical journal
pub_type： 杂志文章,meta分析
doi：10.4103/0366-6999.149219
更新日期：2015-01-20 00:00:00
abstract：BACKGROUND:Myocardial bridging with systolic compression of the left anterior descending coronary artery (LAD) may be associated with myocardial ischaemia. The clinical outcome in patients with surgical treatment for symptomatic myocardial bridging remains undetermined. This study assessed the middle- and long-term res...
journal_title：Chinese medical journal
pub_type： 杂志文章
doi：
更新日期：2007-09-20 00:00:00
abstract：:In 123 cases of transient ischemic attacks, 72 were followed up for 22 years. The percentage of complete stroke was 46.5% and the fatality rate 47.9%. Causes of death, survival rate by life table, limitation of indication of neurovascular surgical operation and rehabilitation of survived patients were studied. The cau...
journal_title：Chinese medical journal
pub_type： 杂志文章
doi：
更新日期：1990-09-01 00:00:00
abstract：BACKGROUND:Cigarette smoke induces an acute but persisting inflammation in peripheral blood and airway in chronic obstructive pulmonary disease (COPD), and CD8(+) Tc-lymphocytes are considered as a key role in this process. We aimed to investigate the Tc-lymphocytes immunodeviation in system and local airway of COPD pa...
journal_title：Chinese medical journal
pub_type： 杂志文章,随机对照试验
doi：
更新日期：2013-01-01 00:00:00
abstract：BACKGROUND:Intra-articular fractures of the fingers are common problems to emergency physicians and hand surgeons. Inappropriate management of these injuries may result in chronic pain, stiffness, deformity, or post traumatic arthritis. Ideal treatment necessitates the restoration of a stable and congruent joint that w...
journal_title：Chinese medical journal
pub_type： 杂志文章
doi：
更新日期：2009-11-05 00:00:00
abstract：BACKGROUND:Nasopharyngeal carcinoma (NPC) is a squamous-cell carcinoma especially prevailing among the natives of southern China. The regimen of concurrent chemoradiotherapy (CCRT) that include platinum and 5-fluorouracil (5-FU) is considered to be the standard treatment for NPC. However, its clinical use is limited by...
journal_title：Chinese medical journal
pub_type： 杂志文章,meta分析
doi：
更新日期：2014-01-01 00:00:00
abstract：BACKGROUND:Most cardiac regenerative approaches can restore injured heart muscles. In this study, we investigated if fibrin sealant could help neonatal cardiomyocytes restore myocardial function in a rat model of myocardial infarction. METHODS:The left anterior descending artery in adult female Sprague-Dawley (SD) rat...
journal_title：Chinese medical journal
pub_type： 杂志文章
doi：
更新日期：2007-11-20 00:00:00
abstract：BACKGROUND:Adenomyosis is a gynecological disorder with symptoms most presenting as dysmenorrhea and heavy menstrual bleeding. However, the presence of lower urinary tract symptoms (LUTS) among women with adenomyosis remains unclear. This study was designed to determine the prevalence of LUTS and factors related to the...
journal_title：Chinese medical journal
pub_type： 杂志文章
doi：10.4103/0366-6999.208232
更新日期：2017-07-05 00:00:00
abstract：BACKGROUND:Effects of icariin on airway inflammation in asthmatic rats and the intervention of LPS induced inflammation are interfered with the machanism of icariin. Our study aimed to observe the effect of icariin on ovalbumin-induced imbalance of Th1/Th2 cytokine expression and its mechanism. METHODS:Sixty male SD r...
journal_title：Chinese medical journal
pub_type： 杂志文章
doi：
更新日期：2011-09-01 00:00:00
abstract：:We presented the experimental results of endothelial cells (EC) seeding in small caliber interpositional dacron grafts of canine carotid arteries. Six weeks after surgery, 9 (56.25%) seeded, and 6 (37.5%) control grafts remained patent. The mean thrombus-free surface area was 83.4% in the seeded and 62% in the control...
journal_title：Chinese medical journal
pub_type： 杂志文章
doi：
更新日期：1989-08-01 00:00:00
abstract：BACKGROUND:Aerosolized amikacin (AA) is a current option for the management of ventilator-associated pneumonia (VAP) caused by multidrug-resistant Gram-negative bacteria (MDR-GNB), as it is reported that AA could increase the alveolar level of the drug without increasing systemic toxicity. This study aimed to evaluate ...
journal_title：Chinese medical journal
pub_type： 杂志文章,随机对照试验
doi：10.4103/0366-6999.205846
更新日期：2017-05-20 00:00:00
abstract：BACKGROUND:Ahmed Glaucoma Valve implantation (AGVI) is used to treat refractory glaucoma. Breakdown of the blood-aqueous barrier (BAB) has been noted after some surgical techniques. The current study was designed to assess BAB disruption after AGVI. METHODS:Anterior chamber protein content was measured by the laser fl...
journal_title：Chinese medical journal
pub_type： 杂志文章
doi：
更新日期：2013-03-01 00:00:00
abstract：:Four calcium channel blockers, i.e. nifedipine, verapamil, cinnarizine and tetrandrine are currently available and used widely in treating cardiovascular diseases. To confirm the effects, if any, of calcium channel blockers on cirrhotic patients with portal hypertension, a study was performed on esophageal variceal pr...
journal_title：Chinese medical journal
pub_type： 临床试验,杂志文章,随机对照试验
doi：
更新日期：1995-11-01 00:00:00
abstract：BACKGROUND:Few clinical studies or randomized clinical trial results have reported the impact of fast track surgery on postoperative insulin sensitivity. This study aimed to investigate the effects of fast track surgery on postoperative insulin sensitivity in patients undergoing elective open colorectal resection. MET...
journal_title：Chinese medical journal
pub_type： 杂志文章,随机对照试验
doi：
更新日期：2012-09-01 00:00:00
abstract：BACKGROUND:Preeclampsia (PE) is a multifactorial pregnancy complication. Maternal underlying condition and adverse factors both influence the pathogenesis of PE. Abnormal lipid metabolism as a maternal underlying disease may participate in the occurrence and development of PE. This study aimed to observe the effects of...
journal_title：Chinese medical journal
pub_type： 杂志文章
doi：
更新日期：2014-01-01 00:00:00
abstract：OBJECTIVE:To assess the existence of a possible infectious factor in varicocele-related infertility. METHODS:A total of 925 seminal plasmas from 590 infertile men with varicocele and 335 infertile patients without palpable varicocele were cultured for Ureaplasma urealyticum infection, and routine semen analysis was ma...
journal_title：Chinese medical journal
pub_type： 杂志文章
doi：
更新日期：1997-11-01 00:00:00
abstract：BACKGROUND:Bioactive proteins, such as cytokines and chemokines, have not been systematically evaluated in healthy and preeclamptic pregnancies. We aimed to investigate the difference of these proteins between healthy and preeclamptic pregnancies in order to help clarify their potential roles in the pathogenesis of hyp...
journal_title：Chinese medical journal
pub_type： 杂志文章
doi：
更新日期：2013-01-01 00:00:00
abstract：OBJECTIVE:To review the development of T follicular helper (TFH) cells and their role in systemic lupus erythematosus (SLE) pathogenesis, the effect of dendritic cells (DCs) on TFH cells in SLE, as well as the potential use of TFH cells as a new therapeutic target in clinical practice. DATA SOURCES:The data used in th...
journal_title：Chinese medical journal
pub_type： 杂志文章,评审
doi：
更新日期：2014-01-01 00:00:00
abstract：BACKGROUND:Primary percutaneous coronary intervention (PCI) is the best treatment of choice for acute ST segment elevation myocardial infarction (STEMI). This study aimed to determine the clinical outcomes of tirofiban combined with the low molecular weight heparin (LMWH), dalteparin, in primary PCI patients with acute...
journal_title：Chinese medical journal
pub_type： 杂志文章,随机对照试验
doi：
更新日期：2011-10-01 00:00:00
abstract：OBJECTIVE:To analyse the relationship between age and treatment with captopril after acute myocardial infarction (AMI). METHODS:In a randomized trial, 822 patients with a first AMI received conventional medical treatment, including intravenous thrombolytic therapy and oral aspirin or metoprolol, and then were randomly...
journal_title：Chinese medical journal
pub_type： 临床试验,杂志文章,随机对照试验
doi：
更新日期：2001-07-01 00:00:00
abstract：BACKGROUND:Chronic liver disease causes aberrant formation of fibrous tissue that impedes normal liver function, ultimately resulting in liver cirrhosis. Iron uptake can occur within the hepatic parenchyma or within the various nodules that form in a cirrhotic liver, termed siderotic nodules (SN). We aimed to investiga...
journal_title：Chinese medical journal
pub_type： 杂志文章
doi：
更新日期：2012-09-01 00:00:00
abstract：BACKGROUND:Obesity has an adverse effect on iron status. Hepcidin-mediated inhibition of iron absorption in the duodenum is a potential mechanism. Iron-deficient obese patients have diminished response to oral iron therapy. This study was designed to assess whether acupuncture could promote the efficacy of oral iron su...
journal_title：Chinese medical journal
pub_type： 杂志文章,随机对照试验
doi：10.4103/0366-6999.200549
更新日期：2017-03-05 00:00:00
abstract：OBJECTIVE:To investigate molecular events of exocytosis in cultured human pheochromocytoma cells with stimulation. METHODS:The cultured pheochromocytoma cells prepared from human adrenal pheochromocytoma tumor were stimulated for the release of catecholamines by depolarization with the administration of 50 mmol/L KCl....
journal_title：Chinese medical journal
pub_type： 杂志文章
doi：
更新日期：1998-04-01 00:00:00
abstract：:The effects of the extracts of 20 Chinese medicinal herbs and an antiviral drug foscarnet on duck hepatitis B virus (DHBV) endogenous DNA polymerase (DNAp) activity were compared. The extracts of P. urinaria showed a dose-dependent inhibition on DHBV DNAp. And those of other herbs showed little inhibition effect. Prim...
journal_title：Chinese medical journal
pub_type： 杂志文章
doi：
更新日期：1995-09-01 00:00:00
abstract：BACKGROUND:Gastric cancer (GC) is one of the most globally prevalent cancers in the world. The pathogenesis of GC has not been fully elucidated, and there still lacks effective targeted therapeutics. The influence of altered kinesin superfamily protein 22 (KIF22) expression in GC progression is still unclearly. The aim...
journal_title：Chinese medical journal
pub_type： 杂志文章
doi：10.1097/CM9.0000000000000742
更新日期：2020-04-20 00:00:00
abstract：BACKGROUND:The efficacy of percutaneous intradiscal radiofrequency thermocoagulation (PIRFT) for the treatment of discogenic low back pain (LBP) remains controversial. However, all the PIRFT studies utilized monopolar radiofrequency thermocoagulation (RFTC). The aim of this study was to investigate the safety and effic...
journal_title：Chinese medical journal
pub_type： 临床试验,杂志文章
doi：10.4103/0366-6999.190682
更新日期：2016-10-05 00:00:00
