ABSTRACT
The reduction and sequestration of toxic Cr(VI) via a one-step process in an aqueous solution is critical to eliminate its environmental risk. In this study, amine functionalized cellulose-based aerogel beads (CGP) was developed for simultaneous and efficient adsorption- reduction- sequestration of Cr(VI). CGP showed a maximum Cr(VI) adsorption capacity of 386.40 mg/g at 25 °C due to its strong electrostatic attraction towards Cr(VI). The simultaneous Cr(VI) adsorption- reduction- sequestration performance of CGP over a wide Cr(VI) concentration range was examined. The mechanism was investigated in-depth via the analysis of adsorption kinetics, XPS spectra, and FTIR spectra. Moreover, the Cr immobilization stability of CGP after adsorption was evaluated in simulated neutral, acidic, and alkaline conditions. The effect of pH, temperature, ionic strength and the presence of interfering ions on CGP adsorption performance were investigated by batch adsorption experiments. Fixed-bed column adsorption study was performed to explore the application potential of CGP beads in a wastewater treatment process.
Subject(s)
Cellulose , Water Pollutants, Chemical , Adsorption , Chromium/analysis , Hydrogen-Ion Concentration , Kinetics , Water Pollutants, Chemical/analysisABSTRACT
Coronary artery to left atrial fistula is rare in patients with mitral stenosis. We report an interesting case of a patient with concomitant mitral valve stenosis and coronary fistulae, originating from the left circumflex artery and drained into the left atrium with two terminal orifices.
Subject(s)
Fistula , Hypertension, Pulmonary , Mitral Valve Stenosis , Coronary Vessels/diagnostic imaging , Heart Atria/diagnostic imaging , Humans , Hypertension, Pulmonary/complications , Hypertension, Pulmonary/diagnostic imaging , Mitral Valve Stenosis/complications , Mitral Valve Stenosis/diagnostic imaging , Mitral Valve Stenosis/surgeryABSTRACT
Abstract Coronary artery to left atrial fistula is rare in patients with mitral stenosis. We report an interesting case of a patient with concomitant mitral valve stenosis and coronary fistulae, originating from the left circumflex artery and drained into the left atrium with two terminal orifices.
Subject(s)
Humans , Fistula , Hypertension, Pulmonary/complications , Hypertension, Pulmonary/diagnostic imaging , Mitral Valve Stenosis/surgery , Mitral Valve Stenosis/complications , Mitral Valve Stenosis/diagnostic imaging , Coronary Vessels/diagnostic imaging , Heart Atria/diagnostic imagingABSTRACT
OBJECTIVE: To compare the efficacy of blind axillary vein puncture utilizing the new surface landmarks for the subclavian method. METHODS: This prospective and randomized study was performed at two cardiology medical centers in East China. Five hundred thirty-eight patients indicated to undergo left-sided pacemaker or implantable cardioverter defibrillator implantation were enrolled, 272 patients under the axillary access and 266 patients under the subclavian approach. A new superficial landmark was used for the axillary venous approach, whereas conventional landmarks were used for the subclavian venous approach. We measured lead placement time and X-ray time from vein puncture until all leads were placed in superior vena cava. Meanwhile, the rate of success of lead placement and the type and incidence of complications were compared between the two groups. RESULTS: There were no significant differences between the two groups in baseline characteristics or number of leads implanted. There were high success rates for both strategies (98.6% [494/501] vs. 98.4% [479/487], P=0.752) and similar complication rates (14% [38/272] vs. 15% [40/266], P=0.702). Six cases in the control group developed subclavian venous crush syndrome and five had pneumothorax, while neither pneumothorax nor subclavian venous crush syndrome was observed in the experimental group. CONCLUSION: We have developed a new blind approach to cannulate the axillary vein, which is as effective as the subclavian access, safer than that, and also allows to get this vein without the guidance of fluoroscopy, contrast, or echography.
Subject(s)
Axillary Vein , Axillary Vein/diagnostic imaging , Axillary Vein/surgery , China , Defibrillators, Implantable , Humans , Prospective Studies , Punctures , Vena Cava, SuperiorABSTRACT
Abstract Objective: To compare the efficacy of blind axillary vein puncture utilizing the new surface landmarks for the subclavian method. Methods: This prospective and randomized study was performed at two cardiology medical centers in East China. Five hundred thirty-eight patients indicated to undergo left-sided pacemaker or implantable cardioverter defibrillator implantation were enrolled, 272 patients under the axillary access and 266 patients under the subclavian approach. A new superficial landmark was used for the axillary venous approach, whereas conventional landmarks were used for the subclavian venous approach. We measured lead placement time and X-ray time from vein puncture until all leads were placed in superior vena cava. Meanwhile, the rate of success of lead placement and the type and incidence of complications were compared between the two groups. Results: There were no significant differences between the two groups in baseline characteristics or number of leads implanted. There were high success rates for both strategies (98.6% [494/501] vs. 98.4% [479/487], P=0.752) and similar complication rates (14% [38/272] vs. 15% [40/266], P=0.702). Six cases in the control group developed subclavian venous crush syndrome and five had pneumothorax, while neither pneumothorax nor subclavian venous crush syndrome was observed in the experimental group. Conclusion: We have developed a new blind approach to cannulate the axillary vein, which is as effective as the subclavian access, safer than that, and also allows to get this vein without the guidance of fluoroscopy, contrast, or echography.
Subject(s)
Humans , Axillary Vein/surgery , Axillary Vein/diagnostic imaging , Vena Cava, Superior , Punctures , China , Prospective Studies , Defibrillators, ImplantableABSTRACT
The universal definition of myocardial infarction (MI) provides five subtypes of acute myocardial infarction (AMI). We present an interesting case of a type 2 myocardial infarction caused by the dilation of the left thoracic stomach.
Subject(s)
Anastomosis, Surgical/adverse effects , Esophagus/surgery , Gastric Dilatation/etiology , Inferior Wall Myocardial Infarction/etiology , Stomach/surgery , Acute Disease , Aged , Benzamides/therapeutic use , Coronary Stenosis/diagnostic imaging , Coronary Stenosis/drug therapy , Coronary Stenosis/etiology , Electrocardiography , Esophagectomy/methods , Esophagus/diagnostic imaging , Gastric Dilatation/diagnostic imaging , Gastric Dilatation/drug therapy , Gastrointestinal Agents/therapeutic use , Gastroparesis/diagnostic imaging , Gastroparesis/drug therapy , Gastroparesis/etiology , Humans , Inferior Wall Myocardial Infarction/diagnosis , Male , Morpholines/therapeutic use , Stomach/diagnostic imaging , Stomach Neoplasms/surgery , Thoracic Cavity/diagnostic imagingABSTRACT
Abstract The universal definition of myocardial infarction (MI) provides five subtypes of acute myocardial infarction (AMI). We present an interesting case of a type 2 myocardial infarction caused by the dilation of the left thoracic stomach.
Subject(s)
Humans , Male , Aged , Stomach/surgery , Gastric Dilatation/etiology , Anastomosis, Surgical/adverse effects , Esophagus/surgery , Inferior Wall Myocardial Infarction/etiology , Gastric Dilatation/drug therapy , Gastric Dilatation/diagnostic imaging , Benzamides/therapeutic use , Gastrointestinal Agents/therapeutic use , Morpholines/therapeutic use , Acute Disease , Esophagectomy/methods , Gastroparesis/etiology , Gastroparesis/drug therapy , Gastroparesis/diagnostic imaging , Coronary Stenosis/etiology , Coronary Stenosis/drug therapy , Coronary Stenosis/diagnostic imaging , Electrocardiography , Esophagus/diagnostic imaging , Inferior Wall Myocardial Infarction/diagnosisSubject(s)
Atrial Appendage , Atrial Fibrillation , Bicuspid Aortic Valve Disease , Cardiac Tamponade , Catheter Ablation , Amputation, Surgical , Atrial Appendage/diagnostic imaging , Atrial Appendage/surgery , Atrial Fibrillation/etiology , Atrial Fibrillation/surgery , Bicuspid Aortic Valve Disease/complications , Cardiac Tamponade/diagnostic imaging , Cardiac Tamponade/etiology , Cardiac Tamponade/surgery , Catheters , Humans , Treatment OutcomeABSTRACT
Abstract Early recognition and rapid and appropriate treatment of cardiac tamponade are mandatory to prevent the irreversible deterioration of cerebral perfusion and other important organs. In this study, cardiac tamponade was induced by inadvertent transseptal puncture, which was managed with pericardial drainage and surgical repair in a patient with symptomatic paroxysmal atrial fibrillation. Epicardial atrial fibrillation ablation and left atrial appendage amputation were also performed at the same time.