scholarly journals Neutralizing Aminesin Boiler Steam and Humidified Indoor Air

2021 ◽  
Vol 15 (1) ◽  
pp. 41-48
Author(s):  
Andrew Gomes ◽  
Ye Tao ◽  
Abdul Bhuiyan ◽  
Don Guan ◽  
Farhad Memarzadeh
Keyword(s):  
Indoor Air ◽  
Field Measurement ◽  
Distribution System ◽  
Significant Risk ◽  
National Institutes Of Health ◽  
Process Contaminants ◽  
Common Technique ◽  
The Right ◽  
Multiple Health ◽  
Concentration Limits

Objective: The health and comfort of the indoor population have been impacted by the humidity. While people are increasingly spending more time indoors, the presence of pollutants and lack of proper humidification in indoor air have significant risk factors that may lead to multiple health problems. Methods: By applying the right air purification and/or humidification system, the adverse effects of poor indoor air quality can be minimized. Direct steam addition is a common technique to humidify the indoor air of a building. Carbon dioxide or other acidic process contaminants may dissolve in steam or steam condensate that will consequently decrease the pH and make it corrosive for the steam distribution system. To avoid that, neutralizing amines are added to steam that keeps the pH neutral or slightly alkaline(pH 7.5-9.0). However, neutralizing amines have some toxic effects. OSHA, FDA, and NIOSH prescribe maximum concentration limits for them in indoor air. The Central Utility Plant (CUP) of National Institutes of Health (NIH) uses a 50:50 blend of cyclohexylamine and diethylaminoethanol as neutralizing agents for the steam. Results: The CUP at NIH presents the results of monitoring the concentration level of amines through mass balance, online monitoring at specified location of the steam distribution system and field measurement in humidified indoor air at buildings on campus. Conclusion Through theoretical calculation backed up by field measurement, the amine concentration of indoor air is determined to be well below the FDA regulated limits.

scholarly journals Temperature Stratification of Underfloor and Ceiling Based Air Heating Distribution System in an Experimental Room

2013 ◽  
Vol 8 (1) ◽  
pp. 43-50
Author(s):  
Dušan Katunský ◽  
Martin Lopušniak ◽  
Anna Vašková
Keyword(s):  
Indoor Air ◽  
Distribution System ◽  
Temperature Stratification ◽  
Natural Motion ◽  
Air Inlet ◽  
Air Heating ◽  
Horizontal Stratification ◽  
Passive Houses ◽  
The Right

Abstract Most of air heating and ventilating systems for passive houses inlet air in floors. It is assumed that a natural motion of air is led upwards, and so the right stratification of temperature in the space is ensured. However, in the case of excellently insulated buildings it is possible to assume that an upper inlet of air is also able to ensure the required layering of temperature. Within the experiment an influence of upper and down air inlet for temperature stratification in the space was followed. Night sensors of indoor air temperature are placed for measurement purposes. Measurements are done in the long term. The results from measurements show that both, vertical and horizontal stratification of temperature in rooms of passive houses are equal regardless of the fact, which system of air inlet is used.

scholarly journals Recurrence hernia in the broad ligament of the uterus: a case report

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Yoshifumi Hashimoto ◽  
Tatsuo Kanda ◽  
Tadasu Chida ◽  
Kazuyoshi Suda
Keyword(s):  
Small Bowel ◽  
Rare Disease ◽  
Broad Ligament ◽  
Significant Risk ◽  
Disease Recurrence ◽  
The Right ◽  
Enhanced Computed Tomography ◽  
Bowel Segments ◽  
Hernia Orifice ◽  
Bowel Herniation

Abstract Background Bowel herniation through a defect in the broad ligament of the uterus is a rare disease and few cases of recurrence have been reported. We report herein a recurrence case of a patient with broad ligament hernia (BLH), along with a review of the literature. Case presentation A 53-year-old woman complaining of abdominal pain was transported to our hospital. She had a history of laparotomy for small-bowel obstruction associated with hernia in the broad ligament of the uterus 10 years ago at a local hospital. Abdominal pelvic contrast-enhanced computed tomography revealed that the mesentery of the dilated bowels converged at a thick band in the pelvis, suggesting closed loop obstruction of the small bowel. The patient underwent urgent laparotomy and was diagnosed with bowel herniation through an opening in the broad ligament of the uterus on the right side, which was ipsilateral with the previous surgery. The hernia orifice was widened by incision and incarcerated bowel segments were released and preserved because ischemia was reversible. The membranous defect of BLH was closed by suture with braded silk strings. Conclusions Although BLH is a rare disease, patients face a significant risk of disease recurrence. Nonabsorbable suture may be advisable for closure of the hernia orifice in BLH.

scholarly journals Tailings facility disclosures reveal stability risks

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Daniel M. Franks ◽  
Martin Stringer ◽  
Luis A. Torres-Cruz ◽  
Elaine Baker ◽  
Rick Valenta ◽  
...  
Keyword(s):  
Information Disclosure ◽  
Significant Risk ◽  
Construction Method ◽  
Facility Management ◽  
Alternative Technologies ◽  
Construction Methods ◽  
Comprehensive Survey ◽  
Engineering Standards ◽  
The Right ◽  
Stability Issues

AbstractTailings facility failures represent a significant risk to the environment and communities globally, but until now little data was available on the global distribution of risks and characteristics of facilities to ensure proper governance. We conducted a survey and compiled a database with information on tailings facilities disclosed by extractive companies at the request of institutional investors. Despite limitations in the data, this information disclosure request represents the most comprehensive survey of tailings facilities ever undertaken. The compiled dataset includes 1743 tailings facilities and provides insights into a range of topics including construction method, stability, consequence of failure, stored volume, and the rate of uptake of alternative technologies to dewater tailings and reduce geotechnical risk. Our analysis reveals that 10 per cent of tailings facilities reported notable stability concerns or failure to be confirmed or certified as stable at some point in their history, with distinct trends according to construction method, governance, age, height, volume and seismic hazard. Controversy has surrounded the safety of tailings facilities, most notably upstream facilities, for many years but in the absence of definitive empirical data differentiating the risks of different facility types, upstream facilities have continued to be used widely by the industry and a consensus has emerged that upstream facilities can theoretically be built safely under the right circumstances. Our findings reveal that in practice active upstream facilities report a higher incidence of stability issues (18.3%) than other facility types, and that this elevated risk persists even when these facilities are built in high governance settings. In-pit/natural landform and dry-stack facilities report lower incidence of stability issues, though the rate of stability issues is significant by engineering standards (> 2 per cent) across all construction methods, highlighting the universal importance of careful facility management and governance. The insights reported here can assist the global governance of tailings facility stability risks.

Dematiaceous fungal invasion of a bandage contact lens

2021 ◽  
Vol 14 (2) ◽  
pp. e240029
Author(s):  
Anirban Dutta ◽  
Sujata Das ◽  
Himanshu Sekhara Behera ◽  
Ruchi Mittal
Keyword(s):  
Contact Lens ◽  
Periodic Acid ◽  
Significant Risk ◽  
Dematiaceous Fungi ◽  
Periodic Acid Schiff ◽  
Bandage Contact Lens ◽  
History Of ◽  
Eye Examination ◽  
The Right

A 61-year-old man presented with a 1-month history of reduced vision, redness and pain in the right eye. Examination revealed a bandage contact lens (BCL) in situ with diffuse, pigmented deposits. On removal, the underlying cornea was found to be clear. He had been prescribed the BCL 6 months ago following a deep-seated corneal foreign body removal and was unable to follow-up subsequently.The BCL was sent for microbiological and histopathological evaluation. The culture revealed growth of Cladosporium spp, a dematiaceous fungi. Periodic acid–Schiff staining revealed infiltration of pigmented fungal filaments into the substance of the BCL.While contact lens deposits are a frequent finding, fungal deposits are seldom noted. Irregular follow-up and improper lens maintenance are significant risk factors for the same. Early identification and subsequent removal of the lens is vital to prevent infection of the underlying ocular structures.

scholarly journals Urgent Endovascular Treatment of Iliac Artery Pseudoaneurysm in Patient with Ehlers-Danlos Syndrome: A Case Report

2020 ◽  
Vol 8 (C) ◽  
pp. 156-160
Author(s):  
Aleksandar Gjoreski ◽  
Ivona Jovanoska ◽  
Gjorgi Dungevski ◽  
Nikola Lazovski ◽  
Menka Lazareska
Keyword(s):  
Endovascular Treatment ◽  
Iliac Artery ◽  
Significant Risk ◽  
Vascular Complications ◽  
High Morbidity ◽  
Ehlers Danlos Syndrome ◽  
Artery Pseudoaneurysm ◽  
Type Iv ◽  
The Right ◽  
Danlos Syndrome

BACKGROUND: Ehlers-Danlos syndrome (EDS) type IV is a heritable disorder of connective tissue that is mainly associated with vascular maladies such as aneurysms, pseudoaneurysms, and dissections with or without spontaneous rupture. Historically, vascular complications in EDS IV have been treated conservatively whenever possible, due to the high morbidity and mortality after vascular interventions, whether open or endovascular. We present a case of a ruptured pseudoaneurysm of the right common iliac artery in a 18-year-old male, who was successfully treated by endovascular approach and later diagnosed with EDS type IV. CASE PRESENTATION: A 18-year-old male patient was admitted in ER with sharp pain in the right hypogastrium, hypotensive and with reduced blood parameters. Multiphasic modern computed tomography (MDCT) scan of abdomen and pelvis revealed massive ride sided pelvic and retroperitoneal hematoma. The presence of pseudoaneurysms on both common iliac arteries (CIA) was detected, with small ulcer on the right side and a focal dissection on the left side. An urgent endovascular repair of the ruptured pseudoaneurysm on the right CIA with covered stent was performed. Patient’s laboratory parameters and clinical status improved significantly within the next few days. CONCLUSIONS: Vascular repair in EDS-IV patients carries significant risk and should be indicated very carefully. Endovascular treatment for these patients is feasible and should be considered as an alternative to open surgery in some challenging cases as this one.

Predictors of venous thromboembolism development before and during chemotherapy for advanced germ cell tumor

2020 ◽  
Vol 50 (3) ◽  
pp. 338-343
Author(s):  
Satoshi Nitta ◽  
Koji Kawai ◽  
Tomokazu Kimura ◽  
Takashi Kawahara ◽  
Shuya Kandori ◽  
...  
Keyword(s):  
Risk Factors ◽  
Venous Thromboembolism ◽  
Lactate Dehydrogenase ◽  
Germ Cell ◽  
Germ Cell Tumor ◽  
Vena Cava ◽  
Significant Risk ◽  
Cell Tumor ◽  
Vein Thrombosis ◽  
The Right

Abstract Objective We retrospectively analyzed the incidence and localization of venous thromboembolism in patients undergoing chemotherapy for advanced germ cell tumor and separately evaluated the risk factors for venous thromboembolism development before and during chemotherapy. Methods We included 121 patients treated with cisplatin-based chemotherapy between 2005 and 2018. Venous thromboembolism was defined as venous thrombosis diagnosed using radiological imaging with or without thromboembolic symptoms. We analyzed the clinical parameters for identifying the possible venous thromboembolism risk factors. Khorana score was used to calculate the venous thromboembolism risk. Results Thirteen patients showed prechemotherapy venous thromboembolism and 13 developed venous thromboembolism during chemotherapy. The most common venous thromboembolism was deep vein thrombosis (10 patients), followed by inferior vena cava thrombus (eight patients) and pulmonary thrombus (six patients). Compared to the group without venous thromboembolism, the group with prechemotherapy venous thromboembolism showed higher proportion of patients with tumors originating in the right testis (10 out of 13), significantly higher lactate dehydrogenase levels (828 IU/L versus 436 IU/L, P = 0.013), significantly higher proportion of patients with retroperitoneal lymph node (RPLN) metastases >5 cm in diameter (76.9% versus 33.7%, P = 0.003) and slightly higher proportion of patients with high-risk Khorana score (≥ 3; 30.8% versus 11.6%). No significant differences were observed between the clinical characteristics of patients with venous thromboembolism developed during chemotherapy and patients without venous thromboembolism. Conclusions We show that both RPLN mass > 5 cm and high lactate dehydrogenase levels are significant risk factors for prechemotherapy venous thromboembolism but not for venous thromboembolism development during chemotherapy.

scholarly journals One Stage Conversion of an Infected Fused Knee to Total Knee Replacement - A Surgical Challenge

2013 ◽  
Vol 7 (1) ◽  
pp. 67-71 ◽  
Author(s):  
Mukartihal Ravikumar ◽  
Daniel Kendoff ◽  
Mustafa Citak ◽  
Stefan Luck ◽  
Thorsten Gehrke ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Total Knee Replacement ◽  
Knee Replacement ◽  
Revision Arthroplasty ◽  
Preoperative Assessment ◽  
Stage Conversion ◽  
One Stage ◽  
Common Technique ◽  
Total Knee ◽  
The Right

Background and Purpose: Two-stage revision arthroplasty is a common technique for the treatment of infected total knee replacement. Few reports have addressed the conversion of a fused knee into a total knee replacement. However, there is no case reported of converting an infected fused knee into a hinge knee using a one-stage procedure. Methods: We report on a 51-year old male patient with an infected fused knee after multiple surgeries. Results and Interpretation: A one-stage conversion of septic fused knee into total knee arthroplasty by a rotational hinge prosthesis was performed. The case highlights that with profound preoperative assessment, meticulous surgical technique, combined antibiotic treatment and the right implant, one-stage revision in a surgical challenge may have a role as a treatment option with good functional outcome.

scholarly journals Operation Testing of an Advanced Personalized Ventilation System

Energies ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1596 ◽  
Author(s):  
Csáky ◽  
Kalmár ◽  
Kalmár
Keyword(s):  
Air Quality ◽  
Thermal Comfort ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Distribution System ◽  
Noise Level ◽  
Background Noise ◽  
Ventilation System ◽  
Air Distribution ◽  
Personalized Ventilation

Using personalized ventilation systems in office buildings, important energy saving might be obtained, which may improve the indoor air quality and thermal comfort sensation of occupants at the same time. In this paper, the operation testing results of an advanced personalized ventilation system are presented. Eleven different air terminal devices were analyzed. Based on the obtained air velocities and turbulence intensities, one was chosen to perform thermal comfort experiments with subjects. It was shown that, in the case of elevated indoor temperatures, the thermal comfort sensation can be improved considerably. A series of measurements were carried out in order to determine the background noise level and the noise generated by the personalized ventilation system. It was shown that further developments of the air distribution system are needed.

Appendicitis

2016 ◽  
Author(s):  
David Scordino
Keyword(s):  
Antibiotic Therapy ◽  
Acute Inflammation ◽  
Surgical Intervention ◽  
Significant Risk ◽  
Disease Course ◽  
Lower Quadrant ◽  
Nonoperative Therapy ◽  
Atypical Presentations ◽  
The Right ◽  
Right Lower Quadrant

Appendicitis is caused by acute inflammation of the appendix (usually secondary to obstruction) and can result in perforation, leading to peritonitis, sepsis, and/or abscess formation. Symptomatology includes anorexia, nausea, vomiting, and periumbilical pain (later localizing to the right lower quadrant). Patients at the extremes of age and pregnant women may have atypical presentations and higher rates of perforation and complications. Most patients suspected of having appendicitis receive prompt surgical intervention (usually laparoscopic). Antibiotic therapy, initiated preoperatively, varies for perforated vs nonperforated appendicitis. In patients with evidence of a contained abscess, nonoperative therapy is considered, as abscess is evidence of a prolonged disease course (more than 5 days) prior to presentation. On imaging, patients may have a well-circumscribed abscess or phlegmon; if immediate surgical intervention is attempted, there is significant risk of morbidity due to adhesions to adjacent tissues.

scholarly journals Metastatic Renal Cell Carcinoma with Level IV Thrombus: Contemporary Management with Complete Response to Neoadjuvant Targeted Therapy

2019 ◽  
Vol 2019 ◽  
pp. 1-5 ◽  
Author(s):  
Abhishek Bhat ◽  
Bruno Nahar ◽  
Vivek Venkatramani ◽  
Indraneel Banerjee ◽  
Oleksandr N. Kryvenko ◽  
...  
Keyword(s):  
Renal Cell Carcinoma ◽  
Targeted Therapy ◽  
Cell Carcinoma ◽  
Renal Cell ◽  
Vena Cava ◽  
Significant Risk ◽  
Complete Response ◽  
Evolutionary Stage ◽  
Urological Cancers ◽  
The Right

Renal cell carcinoma, particularly the most common clear cell type, is one of the most aggressive of urological cancers with significant risk of metastatic spread. It also has a propensity for venotropism with a proportion of tumors developing thrombi up to the right atrium. The response with newly adopted targeted therapy has been considered to be in the evolutionary stage with no clear role with respect to debulking or reducing the size of the inferior vena cava (IVC) thrombus. We describe a case of a right-sided metastatic RCC with Level IV thrombus initially managed with Pazopanib followed by Nivolumab and Adalimumab followed by cytoreductive nephrectomy and IVC thrombectomy in the post-targeted therapy setting with complete curative response.

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