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https://www.readbyqxmd.com/read/28638167/computational-fluid-dynamics-analysis-of-the-venturi-dustiness-tester
#1
Prahit Dubey, Urmila Ghia, Leonid A Turkevich
Dustiness quantifies the propensity of a finely divided solid to be aerosolized by a prescribed mechanical stimulus. Dustiness is relevant wherever powders are mixed, transferred or handled, and is important in the control of hazardous exposures and the prevention of dust explosions and product loss. Limited quantities of active pharmaceutical powders available for testing led to the development (at University of North Carolina) of a Venturi-driven dustiness tester. The powder is turbulently injected at high speed (Re ~ 2 × 10(4)) into a glass chamber; the aerosol is then gently sampled (Re ~ 2 × 10(3)) through two filters located at the top of the chamber; the dustiness index is the ratio of sampled to injected mass of powder...
May 2017: Powder Technology
https://www.readbyqxmd.com/read/28630020/transumbilical-multi-port-laparoscopic-pyeloplasty-versus-transumbilical-single-site-laparoscopic-pyeloplasty-for-ureteropelvic-junction-obstruction-in-children-a-retrospectively-comparative-study
#2
Dehong Liu, Huixia Zhou, Lifei Ma, Huawei Xie, Tian Tao, Hualin Cao, Xiaoguang Zhou, Xiaolong Luo, Shaojun Chen
INTRODUCTION: Laparoscopic pyeloplasty has achieved good cosmetic and functional outcomes. Both transumbilical single-site and transumbilical multi-port approaches are currently being used. No comparison of transumbilical single-site laparoscopic pyeloplasty (TSLP) and transumbilical multi-port laparoscopic pyeloplasty (TMLP) has been reported in the literature. OBJECTIVES: We present a retrospective comparison study to evaluate clinical outcomes of TSLP and TMLP for children with ureteropelvic junction obstruction (UPJO)...
June 3, 2017: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/28622435/single-port-laparoscopic-ileocaecal-resection-for-crohn-s-disease-a-multicentre-comparison-with-multi-port-laparoscopy
#3
Michele Carvello, E Joline de Groof, Anthony de Buck van Overstraeten, Matteo Sacchi, Albert M Wolthuis, Christianne J Buskens, André D'Hoore, Willem A Bemelman, Antonino Spinelli
BACKGROUND AND AIMS: Single port (SP) ileocecal resection (ICR) is an established technique but there are no large studies comparing SP and multi-port (MP) laparoscopic surgery in Crohn's disease (CD). The aim of this study was to compare postoperative pain scores and analgesia requirements after SP and MP laparoscopic ICR for CD. METHODS: This was a retrospective study of patients undergoing SP or MP ICR for CD in three tertiary referral centres from February 1999-October 2014...
June 16, 2017: Colorectal Disease: the Official Journal of the Association of Coloproctology of Great Britain and Ireland
https://www.readbyqxmd.com/read/28619688/single-port-laparoscopy-in-gynecologic-oncology-seven-years-of-experience-at-a-single-institution
#4
Laura Moulton, Amelia M Jernigan, Caitlin Carr, Lindsey Freeman, Pedro F Escobar, Chad M Michener
BACKGROUND: Single port laparoscopy has gained popularity within minimally invasive gynecologic surgery for its feasibility, cosmetic outcomes and safety. However, within gynecologic oncology, there is limited data regarding short-term adverse outcomes and long term hernia risk in patients undergoing single port laparoscopic surgery. OBJECTIVE: To describe short-term outcomes and hernia rates in patients after single port laparoscopy in a gynecologic oncology practice...
June 12, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28619626/assessment-of-heavy-metal-and-petroleum-hydrocarbon-contamination-in-the-sultanate-of-oman-with-emphasis-on-harbours-marinas-terminals-and-ports
#5
Barry P Jupp, Scott W Fowler, Sergey Dobretsov, Henk van der Wiele, Ahmed Al-Ghafri
The assessment here includes data on levels of contaminants (petroleum hydrocarbons and heavy metals) in sediments and biomonitor organisms, including the eulittoral rock oyster Saccostrea cucullata and subtidal biomonitors, the barnacle Balanus trigonus and the antipatharian coral Antipathes sp., at harbours, marinas, terminals and large ports along the coastline of Oman. TBT levels in harbour and port sediments up to a maximum of 100ppb TBT dry weight are highlighted. Oysters contained concentrations up to 367ppm mg TPH/kg dry weight...
June 12, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28614585/assessment-of-intragastric-single-port-surgery-for-gastric-tumors
#6
Felix Krenzien, Johann Pratschke, Ricardo Zorron
No abstract text is available yet for this article.
June 14, 2017: JAMA Surgery
https://www.readbyqxmd.com/read/28614168/glove-port-transanal-excision-of-rectal-tumors-an-alternative-method-for-rectal-tumor-excision-single-center-experience
#7
Sridhar Dharamavaram, Dimple Sapre, Ahmed M A Mohammed, Krishnamurthy Badrinath
AIM: Transanal minimal invasive surgery has been practiced for several years for excision of rectal tumors however there is no standard consensus about its applications. This minimally invasive approach helps in avoiding major rectal resections and its associated risk of mortality and morbidity.The aim of this study is to describe a single center experience with transanal glove port excision of rectal tumors which are not amenable to colonoscopic excision. MATERIALS AND METHODS: Between the years 2011 and 2014, 9 patients underwent glove port excision of rectal tumors located within 15 cm from the anal verge...
June 13, 2017: Surgical Laparoscopy, Endoscopy & Percutaneous Techniques
https://www.readbyqxmd.com/read/28610706/ultrasound-guided-bilateral-rectus-sheath-block-vs-conventional-local-analgesia-in-single-port-laparoscopic-appendectomy-for-children-with-nonperforated-appendicitis
#8
Caroline Maloney, Michelle Kallis, Ibrahim Abd El-Shafy, Aaron M Lipskar, John Hagen, Michelle Kars
INTRODUCTION: Despite its minimally invasive approach, laparoscopic surgery can cause considerable pain. Regional analgesic techniques such as the rectus sheath block (RSB) offer improved pain management following elective umbilical hernia repair in the pediatric population. This effect has not been examined in laparoscopic single-incision surgery in children. We sought to compare the efficacy of bilateral ultrasound-guided RSB versus local anesthetic infiltration (LAI) in providing postoperative pain relief in pediatric single-incision transumbilical laparoscopic assisted appendectomy (TULA) with same-day discharge...
June 2, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28609181/effect-of-the-earned-income-tax-credit-on-hospital-admissions-for-pediatric-abusive-head-trauma-1995-2013
#9
Joanne Klevens, Brian Schmidt, Feijun Luo, Likang Xu, Katie A Ports, Rosalyn D Lee
OBJECTIVES: Policies that increase household income, such as the earned income tax credit (EITC), have shown reductions on risk factors for child maltreatment (ie, poverty, maternal stress, depression), but evidence is lacking on whether the EITC actually reduces child maltreatment. We examined whether states' EITCs are associated with state rates of hospital admissions for abusive head trauma among children aged <2 years. METHODS: We conducted difference-in-difference analyses (ie, pre- and postdifferences in intervention vs control groups) of annual rates of states' hospital admissions attributed to abusive head trauma among children aged <2 years (ie, using aggregate data)...
January 1, 2017: Public Health Reports
https://www.readbyqxmd.com/read/28607282/laparoendoscopic-single-site-adnexal-surgery-preliminary-indian-experience
#10
Smitha Balusamy, Hrishikesh P Salgaonkar, Ramya Ranjan Behera, Ashwini Bhalerao-Gandhi, Deepraj S Bhandarkar
INTRODUCTION: Laparoendoscopic single-site surgery (LESS) is an emerging technique in gynaecology. The proposed advantages of the LESS include better cosmesis and reduction in pain. We report our preliminary experience with LESS in the treatment of adnexal pathology. MATERIALS AND METHODS: After a preoperative workup, LESS was offered to 37 patients between July 2009 and April 2015. All the procedures were carried out through a 2-2.5 cm transumbilical incision using conventional laparoscopic instruments...
July 2017: Journal of Minimal Access Surgery
https://www.readbyqxmd.com/read/28604980/sealed-implantation-of-foldable-intraocular-lenses
#11
Dharmendra Nath, Eytan Z Blumenthal, Mohita Sharma, Michael Mimouni
PURPOSE: To evaluate the safety and efficacy of sealed implantation, a simple technique for implanting foldable intraocular lenses (IOLs). METHODS: This was a retrospective study including consecutive patients who underwent phacoemulsification cataract using the sealed implantation technique. Sealed implantation is a technique in which a single-piece, foldable IOL is implanted without an intraocular ophthalmic viscosurgical device (OVD) or continuous infusion (hydroimplantation) of balanced saline solution (BSS)...
June 10, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28604377/minimally-invasive-distal-pancreatectomy-a-retrospective-review-of-30-cases
#12
Aziz Su Mer, Umut Barbaros, Salvador Morales Conde, Sebahattin Celik, Nihat Aksakal, Jose Maria Alamo, Isaias Alarcon, Nazim Gu Res, Hamit Karayagiz, Ahmet Dinccag, Ridvan Seven, Selcuk Mercan, Demir Budak
OBJECTIVES: Pancreatic surgery has been greatly influenced by the advent of laparoscopic surgery and increasing experience in its performance and by advances in techniques and surgical devices. This study aimed to represent two centers' initial experiences in laparoscopic distal pancreatic surgery. METHODS: This study was a bi-centric study including 30 patients undergoing distal pancreatectomy for pancreatic disorders. All the patients were operated on from November 2006 to November 2013 in Turkey and Spain...
2017: Annali Italiani di Chirurgia
https://www.readbyqxmd.com/read/28600594/-minimally-invasive-approaches-for-transanal-surgery
#13
REVIEW
W Kneist
Since the introduction of transanal endoscopic microsurgery (TEM) in the 1980 s, the minimally invasive transanal approach has been a treatment option for selected patients with colorectal diseases. Recently, transanal minimally invasive surgery (TAMIS) was introduced as an alternative technique. TAMIS is a hybrid between TEM and single-port laparoscopy and was followed by introduction of transanal total mesorectal excision (TaTME). Although the TaTME experience remains preliminary, it appears to be an attractive minimally invasive procedure for carefully selected patients with resectable rectal cancer...
June 9, 2017: Der Chirurg; Zeitschrift Für Alle Gebiete der Operativen Medizen
https://www.readbyqxmd.com/read/28598555/experimental-and-numerical-investigation-on-the-transient-vascular-thermal-response-to-multi-pulse-nd-yag-laser
#14
Dong Li, Ruohui Li, Hao Jia, Bin Chen, Wenjuan Wu, Zhaoxia Ying
BACKGROUND AND OBJECTIVE: Port wine stains (PWS) are congenital vascular malformations that progressively darken and thicken with age. Laser therapy is currently the most effective way in clinical practice for PWS. A 1,064 nm Nd:YAG laser in the near-infrared band can achieve a deeper treatment depth compared to the current widely adopted pulsed dye laser. However, because of its relatively weak absorption by blood, single-pulse Nd:YAG laser requires high energy density to cause effective vessel damage, but may inflict undesirable burning to surrounding collagen...
June 9, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28593155/feasibility-and-safety-of-single-port-video-assisted-thoracic-surgery-for-primary-lung-cancer
#15
Woon Heo, Do Kyun Kang, Ho-Ki Min, Hee Jae Jun, Youn-Ho Hwang
BACKGROUND: The feasibility of single-port video-assisted thoracic surgery (SPVATS) for primary lung cancer is not well understood. In this study, we compared SP and multi-port (MP) VATS for the surgical treatment of patients with primary lung cancer. METHODS: Surgical treatment was performed in 181 patients with primary lung cancer at Inje University Haeundae Paik Hospital between June 2012 and December 2015. A propensity-matched analysis was used to compare the postoperative outcomes and to evaluate the comparative feasibility and safety of SPVATS and MPVATS...
June 2017: Korean Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28593154/mid-term-outcomes-of-single-port-versus-conventional-three-port-video-assisted-thoracoscopic-surgery-for-primary-spontaneous-pneumothorax
#16
Hanna Jung, Tak Hyuk Oh, Joon Yong Cho, Deok Heon Lee
BACKGROUND: The benefits of video-assisted thoracoscopic surgery (VATS) have been demonstrated over the past decades; as a result, VATS has become the gold-standard treatment for primary spontaneous pneumothorax (PSP). Due to improvements in surgical technique and equipment, single-port VATS (s-VATS) is emerging as an alternative approach to conventional three-port VATS (t-VATS). The aim of this study was to evaluate s-VATS as a treatment for PSP by comparing operative outcomes and recurrence rates for s-VATS versus t-VATS...
June 2017: Korean Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28593110/endoscopic-endonasal-transclival-approach-versus-dual-transorbital-port-technique-for-clip-application-to-the-posterior-circulation-a-cadaveric-anatomical-and-cerebral-circulation-simulation-study
#17
Jeremy N Ciporen, Brandon Lucke-Wold, Aclan Dogan, Justin Cetas, William Cameron
Purpose  Simulation training offers a useful opportunity to appreciate vascular anatomy and develop the technical expertise required to clip intracranial aneurysms of the posterior circulation. Materials and Methods  In cadavers, a comparison was made between the endoscopic transclival approach (ETA) alone and a combined multiportal approach using the ETA and a transorbital precaruncular approach (TOPA) to evaluate degrees of freedom, angles of visualization, and ergonomics of aneurysm clip application to the posterior circulation depending on basilar apex position relative to the posterior clinoids...
June 2017: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/28585224/experimental-setup-for-transfer-function-measurement-to-assess-rf-heating-of-medical-leads-in-mri-validation-in-the-case-of-a-single-wire
#18
Alexia Missoffe, Sarra Aissani
PURPOSE: The measurement of the transfer function is a good tool to evaluate the radiofrequency heating of complex conductive wires, such as pacemaker leads. The aim is to describe precisely the design of a transfer function bench and compare the measurements to simulations. METHODS: The transfer function was measured by mean of an excitation probe and a receiving probe, both connected to a two-port vector network analyzer. The experimental results were compared with the simulated results, reproducing the excitation scheme...
June 6, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28584937/a-single-port-robotic-platform-for-laparoscopic-surgery-with-a-large-central-channel-for-additional-instrument
#19
K L Yung, J L K Cheung, S W Chung, S Singh, C K Yeung
A new approach to a surgical robotic platform for single incision laparoscopic or natural orifice transluminal endoscopic surgery is presented in this paper This platform allows insertion of up to four instruments including the robotic arms and the camera through a single cannula at the same footprint. After insertion of all instruments, a large central channel of 15 mm diameter is kept clear for the passage of additional laparoscopic instruments, such as passage or retrieval of suture needles, and/or suction irrigators which greatly facilitates the performance of complex surgical procedures...
June 5, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28584501/-scarless-inguinal-herniorrhaphy
#20
Hiba Abdel-Aziz, Elisha A Chance
INTRODUCTION: Laparoscopic inguinal herniorrhaphy is widely accepted. Robotic-assisted surgery provides improved 3-dimensional visualization and enhanced dexterity. The purpose of this case series was to demonstrate the feasibility of a modified, robotic, single-site, unilateral inguinal herniorrhaphy. TECHNIQUE: Six patients 18 years of age or older with a body mass index <35 provided informed consent and underwent hernia repair with a modified herniorrhaphy technique from January to July 2014...
April 2017: JSLS: Journal of the Society of Laparoendoscopic Surgeons
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