Table2_Embolo/sclerotherapy for the treatment of hand arteriovenous malformations: a single-center retrospective cohort experience.docx

PurposeTo retrospectively report our preliminary experience of treating hand arteriovenous malformations (AVMs) with embolo/sclerotherapy.Materials and methodsRetrospectively review the demographics, treatment detail, outcome data, and complications of 13 consecutive patients with hand AVMs from January 2018 to December 2021. We embolize the dominant outflow vein with elastic coils and then use absolute ethanol or polidocanol for intravascular sclerotherapy and bleomycin for interstitial sclerotherapy.ResultsYakes type II presents in four lesions, type IIIa in six, and type IIIb in three. A total of 29 treatment episodes were conducted for the 13 patients (1 episode for 3 patients, 2 for 4 patients, and 3 for 6 patients; the repeated treatment rate was 76.9%). The mean stretched length of coils for 1 treatment episode was 95 cm. The mean absolute ethanol dosage was 6.8 ml (range 4–30 ml). In addition, 10 ml of 3% polidocanol foam was injected and interstitial sclerotherapy with 150,000 IU bleomycin was performed on every patient. The post-operative arterial-dominant outflow vein pressure index (AVI) increased in the 29 procedures (6.55 ± 1.68 vs. 9.38 ± 2.80, P ConclusionEmbolo/sclerotherapy can be effective and safe for hand AVM. The AVI increased significantly after embolo/sclerotherapy, and the index may be valuable in predicting recurrence in further study.</p

Spectroscopic and Kinetic Studies of Photochemical Reaction of Magnesium Tetraphenylporphyrin with Oxygen

Magnesium tetraphenylporphyrin (MgTPP) was synthesized from meso-tetraphenylporphyrin (H2TPP) in N,N-dimethylformamide (DMF). The photochemical properties of MgTPP in the presence of oxygen were investigated in dichloromethane (CH2Cl2) by conventional fluorescence, UV−vis, 1H NMR, MALDI-TOF-MS, FTIR, and XPS spectroscopic techniques. Spectral analyses showed that under irradiation, MgTPP molecules reacted with O2 molecules, and a stable 1:1 adduct was produced. During the photochemical reaction process, one oxygen molecule was bound to the pyrrolenine nitrogens in the MgTPP molecule, and the characteristic N−O bonds were identified using the FTIR and XPS techniques. The kinetics of the photochemical reaction of MgTPP with O2 has been studied in an oxygen-saturated solution. Under irradiation conditions, the experimental rate follows a pseudo-first-order reaction for MgTPP, having a half-life from 40 to 130 min under various irradiation intensities. The kinetic rate constant of photochemical reaction of MgTPP with O2 showed a linear dependence

Presentation1_Embolo/sclerotherapy for the treatment of hand arteriovenous malformations: a single-center retrospective cohort experience.pptx

PurposeTo retrospectively report our preliminary experience of treating hand arteriovenous malformations (AVMs) with embolo/sclerotherapy.Materials and methodsRetrospectively review the demographics, treatment detail, outcome data, and complications of 13 consecutive patients with hand AVMs from January 2018 to December 2021. We embolize the dominant outflow vein with elastic coils and then use absolute ethanol or polidocanol for intravascular sclerotherapy and bleomycin for interstitial sclerotherapy.ResultsYakes type II presents in four lesions, type IIIa in six, and type IIIb in three. A total of 29 treatment episodes were conducted for the 13 patients (1 episode for 3 patients, 2 for 4 patients, and 3 for 6 patients; the repeated treatment rate was 76.9%). The mean stretched length of coils for 1 treatment episode was 95 cm. The mean absolute ethanol dosage was 6.8 ml (range 4–30 ml). In addition, 10 ml of 3% polidocanol foam was injected and interstitial sclerotherapy with 150,000 IU bleomycin was performed on every patient. The post-operative arterial-dominant outflow vein pressure index (AVI) increased in the 29 procedures (6.55 ± 1.68 vs. 9.38 ± 2.80, P ConclusionEmbolo/sclerotherapy can be effective and safe for hand AVM. The AVI increased significantly after embolo/sclerotherapy, and the index may be valuable in predicting recurrence in further study.</p

Table3_Embolo/sclerotherapy for the treatment of hand arteriovenous malformations: a single-center retrospective cohort experience.docx

PurposeTo retrospectively report our preliminary experience of treating hand arteriovenous malformations (AVMs) with embolo/sclerotherapy.Materials and methodsRetrospectively review the demographics, treatment detail, outcome data, and complications of 13 consecutive patients with hand AVMs from January 2018 to December 2021. We embolize the dominant outflow vein with elastic coils and then use absolute ethanol or polidocanol for intravascular sclerotherapy and bleomycin for interstitial sclerotherapy.ResultsYakes type II presents in four lesions, type IIIa in six, and type IIIb in three. A total of 29 treatment episodes were conducted for the 13 patients (1 episode for 3 patients, 2 for 4 patients, and 3 for 6 patients; the repeated treatment rate was 76.9%). The mean stretched length of coils for 1 treatment episode was 95 cm. The mean absolute ethanol dosage was 6.8 ml (range 4–30 ml). In addition, 10 ml of 3% polidocanol foam was injected and interstitial sclerotherapy with 150,000 IU bleomycin was performed on every patient. The post-operative arterial-dominant outflow vein pressure index (AVI) increased in the 29 procedures (6.55 ± 1.68 vs. 9.38 ± 2.80, P ConclusionEmbolo/sclerotherapy can be effective and safe for hand AVM. The AVI increased significantly after embolo/sclerotherapy, and the index may be valuable in predicting recurrence in further study.</p

Experimental Solubility and Absorption Mechanism of Dilute SO₂ in the Binary System of Diethylene Glycol Monomethyl Ether and Dimethyl Sulfoxide

In this paper, a diethylene glycol monomethyl ether (DGME) + dimethyl sulfoxide (DMSO) system was used for the absorption of dilute SO2, and the gas–liquid equilibrium (GLE) data of the binary system for SO2 at p = 123.15 kPa and T= (303.15 K-318.15 K) were measured by a GLE device. Meanwhile, different temperatures and different ratios were also measured, Henry’s constants at different temperatures were fitted based on the measured data, and the thermodynamic parameters of dissolution enthalpy, dissolution entropy, and dissolution Gibbs free energy of the dissolution process were calculated. The results of five cycles of SO2 absorption and resolution showed that the maximum absorption of SO2 in the binary system was 0.85 g/g. The desorption rate could reach 97%, and the absorption and desorption capacities did not decrease significantly after the cycle. The mechanism of SO2 absorption in the binary system was discussed and analyzed by combining spectral analysis and quantum chemistry. The spectroscopic results show that the weak interaction forces between DGME, DMSO, and SO2 are hydrogen bonding forces and dipole–dipole interaction forces, which lay the theoretical foundation for the application and practice of binary hybrid systems. This can provide important GLE data for the design and operation of organic solvent absorption and desorption of SO2 in flue gas desulfurization, and the prepared absorbent has a potential industrial application value

Table1_Embolo/sclerotherapy for the treatment of hand arteriovenous malformations: a single-center retrospective cohort experience.docx

PurposeTo retrospectively report our preliminary experience of treating hand arteriovenous malformations (AVMs) with embolo/sclerotherapy.Materials and methodsRetrospectively review the demographics, treatment detail, outcome data, and complications of 13 consecutive patients with hand AVMs from January 2018 to December 2021. We embolize the dominant outflow vein with elastic coils and then use absolute ethanol or polidocanol for intravascular sclerotherapy and bleomycin for interstitial sclerotherapy.ResultsYakes type II presents in four lesions, type IIIa in six, and type IIIb in three. A total of 29 treatment episodes were conducted for the 13 patients (1 episode for 3 patients, 2 for 4 patients, and 3 for 6 patients; the repeated treatment rate was 76.9%). The mean stretched length of coils for 1 treatment episode was 95 cm. The mean absolute ethanol dosage was 6.8 ml (range 4–30 ml). In addition, 10 ml of 3% polidocanol foam was injected and interstitial sclerotherapy with 150,000 IU bleomycin was performed on every patient. The post-operative arterial-dominant outflow vein pressure index (AVI) increased in the 29 procedures (6.55 ± 1.68 vs. 9.38 ± 2.80, P ConclusionEmbolo/sclerotherapy can be effective and safe for hand AVM. The AVI increased significantly after embolo/sclerotherapy, and the index may be valuable in predicting recurrence in further study.</p

Gas–liquid equilibrium data for mixture gas of carbon dioxide + nitrogen in 1,2-ethanediamine + triethylene glycol aqueous solution

<p>Isothermal gas–liquid equilibrium (GLE) data were measured for the system of 1,2-ethanediamine (EDA) + triethylene glycol (TEG) + H₂O + carbon dioxide (CO₂) + N₂ at <i>T</i> = 293.15, 298.15, 303.15 and 308.15 K and <i>p </i>= 121.74, 126.94 and 129.87 kPa with CO₂ partial pressure ranging from 0 to 13.0 kPa. Measurements were carried out using a saturation method in a glass absorption apparatus, which was controlled at the constant temperature by a thermostatic circulation bath with a Beckmann thermometer. The measurement uncertainties for temperature, total pressure, CO₂ concentration in the gas phase and CO₂ concentration in the liquid phase were less than ±0.02 K, ±0.15 kPa, ±2.5% and ±0.6, respectively. The results indicate that the addition of TEG into the aqueous EDA solution could significantly improve the stability of EDA in CO₂ absorption process, thus enhancing the performance of aqueous amine-based CO₂ scrubbing.</p

Gas−Liquid Equilibrium Data for the Mixture Gas of Sulfur Dioxide/Nitrogen with Ethylene Glycol at Temperatures from (298.15 to 313.15) K under Low Pressures

Gas−Liquid Equilibrium Data for the Mixture Gas of Sulfur Dioxide/Nitrogen with Ethylene Glycol at Temperatures from (298.15 to 313.15) K under Low Pressure

Hydrogen Bonding and Interaction in the Absorption Processes of Sulfur Dioxide in Ethylene Glycol + Water Binary Desulfurization System

In this work, ethylene glycol (EG) (1) + water (2) solutions (EGWs) were used as the promising medium for the absorption and desorption processes of SO2. Desorption data showed that SO2 can be desorbed easily from EGWs + SO2 at 333 K. Φ1 = 70−90% (volume fraction of EG in EGWs) were considered as reasonable compositions of desulfurization solution. Considering the industrial flue gas desulfurization (FGD) processes, Φ1 = 80% EGW (approximately 0.5 molar fraction of EG) was confirmed as the optimum composition of desulfurization solution. When conventional UV, FTIR, and 1H NMR spectroscopic techniques were used for inspection of spectral changes of SO2 in EGWs, the spectral results suggest that SO2 can interact with EG by hydrogen bonds

Gas−Liquid Equilibrium Data for a Mixture Gas of Sulfur Dioxide + Nitrogen with Ethylene Glycol Aqueous Solutions at 298.15 K and 123.15 kPa

Isothermal gas−liquid equilibrium (GLE) data have been measured for the system SO2 + N2 + ethylene glycol (EG) + water at 298.15 K and 123.15 kPa and SO2 partial pressures in the range of (0 to 120) Pa. Measurements were carried out by a saturation method using a glass absorption apparatus, which was controlled at constant temperature by a thermostatic circulation bath with a Beckmann thermometer. The GLE data were obtained with relative uncertainties within ± 3.5 % for SO2 concentration in the gas phase and ± 0.6 % for SO2 concentration in the liquid phase. The measurement showed that the addition of water to EG enhanced the solubility of SO2 compared with pure EG and that the 80 % volume fraction of EG in ethylene glycol + water solution is a more reasonable composition used as the desulfurization solution. The results of this work can be used to provide important GLE data for the design and operation of the absorption and desorption process in flue gas desulfurization (FGD) with potential industrial application of EG aqueous solutions