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https://www.readbyqxmd.com/read/28917921/effect-of-oxidized-chitin-nanocrystals-isolated-by-ammonium-persulfate-method-on-the-properties-of-carboxymethyl-cellulose-based-films
#1
Ahmed A Oun, Jong-Whan Rhim
Oxidized chitin nanocrystals (ChNCs) were isolated from crab shell chitin using ammonium persulfate (APS) method. The oxidized ChNCs were in needle shape with a diameter of 15nm, the length of 400-500nm, and crystallinity index of 93.5%. Carboxymethyl cellulose (CMC)-based films reinforced with the ChNCs (0, 1, 5, and 10wt.%) were flexible and transparent. The mechanical strength of the CMC film increased significantly (p<0.05) after blending with the ChNCs. The tensile strength (TS) and elastic modulus (EM) increased by 88% and 243% when 10wt...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28917867/nanocrystalline-cellulose-isolated-from-discarded-cigarette-filters
#2
Segun A Ogundare, Vashen Moodley, Werner E van Zyl
We report the isolation of nanocrystalline cellulose (NCC) produced from discarded cigarette filters (DCF). The DCF were processed into cellulose via ethanolic extraction, hypochlorite bleaching, alkaline deacetylation, and then converted into NCC by sulfuric acid hydrolysis. The morphological structures of the isolated NCC established with TEM showed that the nanocrystals were needle-like with a mean length of 143nm. FEGSEM showed the morphological transition of the micro-sized DCF to self-assembled NCC while EDX revealed the presence of Ti (as TiO2) in DCF, which was retained in the NCC...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28917706/the-effects-of-needle-damage-on-annulus-fibrosus-micromechanics
#3
Claudio Vergari, Jessica C Mansfield, Daniel Chan, Andrew Clarke, Judith R Meakin, Peter C Winlove
Needle puncture of the intervertebral disc can initiate a mechanical and biochemical cascade leading to disc degeneration. Puncture's mechanical effects have been shown near the puncture site, mechanical effects should be observed far, relative to needle size, from the puncture site, given the disc-wide damage induced by the stab. The aim of this work was to quantify these far-field effects, and to observe the local structural damage provoked by the needle. Strips of cow tail annulus fibrosus underwent two consecutive mechanical loadings to 5% tensile strain; fifteen samples were punctured in a radial direction with a randomly assigned needle between the two loadings (needle gauges between 19 and 23)...
September 13, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28917705/long-term-retention-of-ecm-hydrogel-after-implantation-into-a-sub-acute-stroke-cavity-reduces-lesion-volume
#4
Harmanvir Ghuman, Madeline Gerwig, Francesca J Nicholls, Jessie Liu, Julia Donnelly, Stephen F Badylak, Michel Modo
Salvaging or functional replacement of damaged tissue caused by stroke in the brain remains a major therapeutic challenge. In situ gelation and retention of a hydrogel bioscaffold composed of 8 mg/mL extracellular matrix (ECM) can induce a robust invasion of cells within 24 hours and potentially promote a structural remodeling to replace lost tissue. Herein, we demonstrate a long-term retention of ECM hydrogel within the lesion cavity. A decrease of approximately 32% of ECM volume is observed over 12 weeks...
September 13, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28917432/complications-after-treating-dupuytren-s-disease-a-systematic-literature-review
#5
C Krefter, M Marks, S Hensler, D B Herren, M Calcagni
The objective of this study was to review the incidence of complications associated with different treatment options for patients with Dupuytren's disease. In a systematic literature review, the PubMed, EMBASE, Cochrane and Scopus databases were searched for clinical studies reporting complications after collagenase treatment, percutaneous needle fasciotomy (PNF), fasciectomy and dermofasciectomy. The incidence of complications was extracted from each study and stratified by procedure. From a total of 2251 references, 113 studies were analyzed and included with complication incidences varying from 0% to 100%...
September 13, 2017: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/28917063/accuracy-of-preoperative-fine-needle-aspiration-in-diagnosis-of-malignant-parotid-tumors
#6
Hani Z Marzouki, Mohammed A Altabsh, Mohammed O Albakrei, Talal A Al-Khatib, Mazin A Merdad, Nada J Farsi
To determine the diagnostic accuracy of fine needle aspiration (FNA) for detecting malignant parotid tumors. Methods: We conducted a retrospective study of all patients diagnosed with benign or malignant parotid gland tumors in King Abdulaziz University Hospital,  Jeddah, Saudi Arabia, between January 2004 and May 2015. The records of 65 subjects were obtained. Histopathological findings and data from FNA examinations were obtained from medical records. Twenty-three subjects were excluded due to missing FNA, histopathology results or both...
October 2017: Saudi Medical Journal
https://www.readbyqxmd.com/read/28916859/near-infrared-cholecystocholangiography-with-direct-intragallbladder-indocyanine-green-injection-preliminary-clinical-results
#7
Yu-Yin Liu, Chien-Hung Liao, Michele Diana, Shang-Yu Wang, Seong-Ho Kong, Chun-Nan Yeh, Bernard Dallemagne, Jacques Marescaux, Ta-Sen Yeh
BACKGROUND: Near-infrared (NIR) fluorescence cholangiography by systemic administration of indocyanine green (ICG) enhances the visualization of the biliary tree anatomy. However, the simultaneous enhancement of liver parenchyma can disturb the visualization of critical details. We herein proposed a new technique of NIR cholecystocholangiography by intragallbladder ICG injection to increase the safety during laparoscopic cholecystectomy. METHODS: A total of 46 patients scheduled for laparoscopic cholecystectomy for symptomatic lithiasis (n = 21) or cholecystitis (n = 25) were enrolled...
September 15, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28916453/making-the-legal-and-ethical-case-for-universal-screening-for-postpartum-mood-and-anxiety-disorders-in-pediatric-primary-care
#8
Amy Lewis Gilbert, Casey Balio, Nerissa S Bauer
Postpartum depression (PPD), part of a larger spectrum of perinatal mood and anxiety disorders, affects up to 15% of women following the birth of an infant. Fathers may also be affected. PPD not only affects caregivers, but also impacts infants through mechanisms such as inadequate caregiver-infant interactions and non-adherence to safety practices. The negative impact on infants may extend across the life course through adulthood. This article seeks to move the needle toward universal screening for PPD using validated tools in pediatric primary care settings for new caregivers by making the legal and ethical case for this course of action in a manner that is both compelling and accessible for clinicians...
September 12, 2017: Current Problems in Pediatric and Adolescent Health Care
https://www.readbyqxmd.com/read/28916344/image-guided-percutaneous-omental-and-mesenteric-biopsy-assessment-of-technical-success-rate-and-diagnostic-yield
#9
Harshna V Vadvala, Vanessa Fiorini Furtado, Avinash Kambadakone, Nathan E Frenk, Peter R Mueller, Ronald S Arellano
PURPOSE: To assess biopsy technique, technical success rate, and diagnostic yield of image-guided percutaneous biopsy of omental and mesenteric lesions. MATERIALS AND METHODS: This retrospective study included 186 patients (89 men, 97 women; mean [SD] age, 63 [13.8] y) who underwent percutaneous image-guided biopsy of omentum and mesentery between March 2007 and August 2015. Biopsies were performed with computed tomography (CT) (n = 172) or ultrasound (US) (n = 14) guidance using coaxial technique yielding core and fine-needle aspiration (FNA) specimens...
September 13, 2017: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/28915281/precision-in-dermal-filling-a-comparison-between-needle-and-cannula-when-using-soft-tissue-fillers
#10
Tatjana Pavicic, Konstantin Frank, Katharina Erlbacher, Romy Neuner, Stefan Targosinski, Thilo Schenck, Robert H Gotkin, Sebastian Cotofana
BACKGROUND: Precise implantation of soft tissue fillers to treat the signs of aging is crucial for patient safety and the best aesthetic outcome. Injections are performed commonly with either needles or cannulas, but quantitative comparative data on precise implantation are still elusive. METHODS: Ten fresh-frozen cephalic foreheads (9 male, 1 female) were injected with radiopaque material using both needles and cannulas. Needle injection relied on a perpendicular transcutaneous approach, whereas cannulas were moved in the supra-periosteal plane until reaching the same location as the needle...
September 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28914983/suggesting-the-cytologic-diagnosis-of-noninvasive-follicular-thyroid-neoplasm-with-papillary-like-nuclear-features-niftp-a-retrospective-analysis-of-atypical-and-suspicious-nodules
#11
Kyle C Strickland, Brooke E Howitt, Justine A Barletta, Edmund S Cibas, Jeffrey F Krane
BACKGROUND: The term "noninvasive follicular thyroid neoplasm with papillary-like nuclear features" (NIFTP) has replaced a subset of follicular variant of papillary thyroid carcinoma due to the indolent behavior of such tumors. NIFTPs are most often classified in an "indeterminate" diagnostic category. In the current study, the authors sought to identify cytologic features helpful in distinguishing NIFTP from other entities in these categories, particularly benign nodules. METHODS: The authors retrospectively evaluated a consecutive cohort of 130 thyroid fine-needle aspiration (FNA) specimens with an indeterminate diagnosis and available histopathologic follow-up...
September 15, 2017: Cancer
https://www.readbyqxmd.com/read/28914981/fna-cytology-of-solitary-fibrous-tumors-and-the-diagnostic-value-of-stat6-immunocytochemistry
#12
Edneia Tani, Johan Wejde, Kristina Åström, Inga-Lill Wingmo, Olle Larsson, Felix Haglund
BACKGROUND: Solitary fibrous tumors (SFTs) are rare mesenchymal tumors commonly located in the pleura, soft tissues, or meninges and are characterized by the NGFI-A-binding protein 2 (NAB2)-signal transducer and activator of transcription 6 (STAT6) fusion gene. Recent studies have indicated that nuclear STAT6 immunohistochemistry is a specific marker for SFTs. METHODS: The authors reviewed fine-needle aspiration (FNA) specimens from extracranial SFTs diagnosed at their institution between 1993 and 2017...
September 15, 2017: Cancer
https://www.readbyqxmd.com/read/28914120/the-furthest-left-behind-the-urgent-need-to-scale-up-harm-reduction-in-prisons
#13
Gen Sander, Fionnuala Murphy
Purpose Raise awareness about the disproportionate impact of HIV and hepatitis C (HCV) on prisoners worldwide and the need for key harm reduction services such as needle and syringe programmes and opioid substitution therapy in prisons offer practical recommendations to assist policy makers in implementing or scaling up these services. The paper aims to discuss these issues. Design/methodology/approach This study is a desk review of existing data and evidence on HIV, HCV and harm reduction in prisons, analysis of political barriers and formulation of key policy recommendations...
September 11, 2017: International Journal of Prisoner Health
https://www.readbyqxmd.com/read/28913901/real-time-continuous-monitoring-of-injection-pressure-at-the-needle-tip-for-peripheral-nerve-blocks-description-of-a-new-method
#14
C Quadri, A Saporito, X Capdevila
The measurement of injection pressure during the performance of peripheral nerve blocks can be pivotal to detect intraneural placement of the needle tip and thus avoid intrafascicular injection. However, injection pressure can only be measured along the injection line (tubing), which is influenced by several factors. The primary aim of this feasibility study was to describe and validate the principle of a novel nerve-block needle conceived for real-time continuous monitoring of injection pressures at the needle tip...
September 14, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28913649/improvement-in-diagnostic-and-therapeutic-arthrocentesis-via-constant-compression
#15
Tej B Bhavsar, Wilmer L Sibbitt, Philip A Band, Romy J Cabacungan, Timothy S Moore, Luis C Salayandia, Roderick A Fields, Scarlett K Kettwich, Luis P Roldan, N Suzanne Emil, Monthida Fangtham, Arthur D Bankhurst
We hypothesized that constant compression of the knee would mobilize residual synovial fluid and promote successful arthrocentesis. Two hundred and ten knees with grade II-III osteoarthritis were included in this paired design study: (1) conventional arthrocentesis was performed with manual compression and success and volume (milliliters) determined; and (2) the intra-articular needle was left in place, and a circumferential elastomeric brace was tightened on the knee to provide constant compression. Arthrocentesis was attempted again and additional fluid volume was determined...
September 14, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28913514/the-incidence-of-needle-stick-and-sharp-injuries-and-their-associations-with-visual-function-among-hospital-nurses
#16
Mohammad Ghasemi, Mehdi Khabazkhoob, Hassan Hashemi, Abbasali Yekta, Payam Nabovati
PURPOSE: To determine the one-year incidence of needle stick and sharp injuries (NSIs and SIs) and their associations with visual function among Iranian nurses. METHODS: In this cross-sectional study, 278 nurses working at one hospital were selected through stratified random sampling. After applying the exclusion criteria, the final analysis was performed on the data of 267 nurses. The data of occupational injuries were collected through a researcher-administered questionnaire...
September 2017: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/28913283/reduction-of-zygomatic-arch-isolated-fracture-using-ultra-sound-and-needle-marking
#17
Jun Sik Kim, Young Ji Park, Yoon Jung Lee, Nam Gyun Kim, Kyung Suk Lee
BACKGROUND: Zygomatic arch is a bony arch constituting the lateral midface, which consists of 25% of all midface fractures. There are a number of ways to evaluate the extent of zygomatic arch fracture. Some authors have reported successful treatment outcomes using ultrasound (U/S). To add to the previous methods, we have considered ways to accurately display the location of the fracture line while using U/S with 23 gauge needle marking. We introduce our method, which provided satisfactory results for reduction using a portable U/S, and it can evaluate the fracture line simultaneously when reduction of an isolated zygomatic arch fracture is necessary, and needle marking, which can easily point out the fracture line on U/S...
December 2016: Arch Craniofac Surg
https://www.readbyqxmd.com/read/28912407/diagnostic-efficacy-of-percutaneous-renal-tumor-biopsy-concomitant-use-of-frozen-section-to-accurately-diagnose-renal-tumor-with-necrosis
#18
Junichi Hori, Shin Kobayashi, Gaku Tamaki, Makoto Azumi, Hidehiro Kakizaki
OBJECTIVES: To evaluate the diagnostic efficacy of percutaneous renal tumor biopsy. METHODS: We retrospectively investigated 23 patients who underwent percutaneous renal tumor biopsy since 2008 at Department of Renal and Urologic Surgery, Asahikawa Medical University Hospital. We examined indications of biopsy, diagnostic concordance rate between urologists, radiologists and biopsy findings, pathological findings and biopsy-related complications. RESULTS: Renal tumor biopsy was performed under ultrasonography guidance in 21 patients and computed tomography guidance in 2...
September 2017: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/28911946/suboptimal-interobserver-agreement-among-cytopathologists-for-endoscopic-ultrasound-fine-needle-aspirates-of-solid-pancreatic-lesions
#19
Carrie Marshall, Rawad Mounzer, Matt Hall, Violette Simon, Barbara Centeno, Katie Dennis, Jasreman Dhillon, Fang Fan, Laila Khazai, Jason Klapman, Srinadh Komanduri, Xiaoqi Lin, David Lu, Sanjana Mehrotra, V Raman Muthusamy, Ritu Nayar, Ajit Paintal, Jianyu Rao, Sharon Sams, Janak Shah, Rabindra Watson, Amit Rastogi, Sachin Wani
BACKGROUND AND AIMS: Despite the widespread use of endoscopic ultrasound-guided fine needle aspiration (EUS-FNA) and the standardization of pancreaticobiliary cytopathologic nomenclature, data on interobserver agreement (IOA) amongst cytopathologists evaluating pancreatic tissue specimens are limited. We aimed to assess IOA among cytopathologists evaluating EUS-FNA specimens of solid pancreatic lesions for overall cytologic diagnosis and quantitative and qualitative parameters using a novel standardized scoring tool and to evaluate predictors of agreement...
September 11, 2017: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28911828/laparoscopic-sentinel-lymph-node-mapping-with-indocyanine-green-icg-using-ispies-platform-the-initial-experience-in-argentina
#20
Julian Di Guilmi, Maria Cecilia Darin, Maria Toscano, Gustavo Maya
OBJECTIVE: To demonstrate the initial experience in Argentina using the iSpies ICG platform in performing sentinel lymph node mapping in early-stage cervical cancer. Design Step-by-step video and pictures BACKGROUND: Laparoscopic and robotic sentinel lymph node mapping using ICG has been shown to be safe and feasible. However, the use of fluorescent imaging through a minimally invasive approach in developing countries is very limited given the cost restrictions of acquiring the near infrared technology and the fluorescent dyes...
September 11, 2017: Journal of Minimally Invasive Gynecology
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