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https://www.readbyqxmd.com/read/27922831/comprehensive-monte-carlo-study-of-patient-doses-from-cone-beam-ct-imaging-in-radiotherapy
#1
T E Marchant, K D Joshi
Accurate knowledge of ionizing radiation dose from cone-beam CT (CBCT) imaging in radiotherapy is important to allow concomitant risks to be estimated and for justification of imaging exposures. This study uses a Monte Carlo CBCT model to calculate imaging dose for a wide range of imaging protocols for male and female patients. The Elekta XVI CBCT system was modeled using GATE and simulated doses were validated against measurements in a water tank and thorax phantom. Imaging dose was simulated in the male and female ICRP voxel phantoms for a variety of anatomical sites and imager settings (different collimators, filters, full and partial rotation)...
December 6, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27916735/laryngeal-mucus-hypersecretion-is-exacerbated-after-smoking-cessation-and-ameliorated-by-glucocorticoid-administration
#2
Rumi Ueha, Satoshi Ueha, Kenji Kondo, Takaharu Nito, Yoko Fujimaki, Hironobu Nishijima, Koichi Tsunoda, Francis H W Shand, Kouji Matsushima, Tatsuya Yamasoba
INTRODUCTION: The mechanisms underlying the effects of cigarette smoke and smoking cessation on respiratory secretion, especially in the larynx, remain unclear. OBJECTIVES: The aims of this study were to determine the effects of cigarette smoke and smoking cessation on laryngeal mucus secretion and inflammation, and to investigate the effects of glucocorticoid administration. METHODS: We administered cigarette smoke solution (CSS) to eight-week-old male Sprague Dawley rats for four weeks, then examined laryngeal mucus secretion and inflammatory cytokine expression on days 1, 28 and 90 after smoking cessation...
December 1, 2016: Toxicology Letters
https://www.readbyqxmd.com/read/27912214/common-cold-an-umbrella-term-for-acute-infections-of-nose-throat-larynx-and-bronchi
#3
P Kardos, F A Malek
Acute respiratory tract infections, i. e. rhinitis, sinusitis, pharyngitis, laryngitis, bronchitis, belong to the most common medical conditions with a high economic burden. Nonetheless, there is little agreement concerning their differential diagnosis.This paper will discuss to what extent different anatomical sites of acute respiratory tract infections can be uniquely identified or whether the overlap and consecutive development in signs and symptoms renders these distinctions meaningless.Acute respiratory tract infections are variable but definition of diagnostic categories based on the anatomical sites of the dominant complaints shows that signs and symptoms both overlap to a great extent and/or emerge successively...
December 2, 2016: Pneumologie
https://www.readbyqxmd.com/read/27905113/predictors-of-outcome-with-cetuximab-and-paclitaxel-for-head-and-neck-squamous-cell-carcinoma
#4
Bruna Pellini Ferreira, Mary Redman, Kelsey K Baker, Renato Martins, Keith D Eaton, Laura Quan Man Chow, Christina S Baik, Bernardo Goulart, Sylvia Mina Lee, Rafael Santana-Davila, Cristina P Rodriguez
OBJECTIVES: Identify predictors of outcome in patients with recurrent/metastatic head and neck squamous cell carcinoma (RMHNSCC) treated with weekly cetuximab and paclitaxel (CP). STUDY DESIGN: Retrospective analysis. METHODS: Patients with RMHNSCC treated with CP were identified and patient data was recorded. The Kaplan-Meier method was used to estimate outcomes, and Cox regression analysis was used to examine outcome predictors. RESULTS: Fifty-nine patients initiated CP between January 2007 and June 2014...
December 1, 2016: Laryngoscope
https://www.readbyqxmd.com/read/27898173/an-update-on-larynx-cancer
#5
REVIEW
Conor E Steuer, Mark El-Deiry, Jason R Parks, Kristin A Higgins, Nabil F Saba
Answer questions and earn CME/CNE Laryngeal cancer remains one of the most common tumors of the respiratory tract. Fortunately, significant advancements have been made over the past decade in the treatment of laryngeal cancer. Although surgery has been the historical mainstay for localized disease and still is an integral part of treatment, nonsurgical options like radiation and systemic therapy have emerged as viable options. In addition, in the metastatic setting, novel agents are showing promise for this patient population...
November 29, 2016: CA: a Cancer Journal for Clinicians
https://www.readbyqxmd.com/read/27891428/fiberoptic-guided-retrograde-intubation-in-an-anticipated-difficult-airway-revival-of-an-antiquated-technique
#6
Samarjit Dey, Marie Ninu, Md Yunus, Newstar Syiemiong
Retrograde intubation is an invaluable technique which can be helpful in anticipated difficult airway situation. In this advanced era where fiberoptic intubation and video laryngoscopes are in abundant use, retrograde intubation is a forgotten technique. However, it may be useful in various difficult airway situations in this advanced era. In our case the patient had a bitter experience with previous fiberoptic intubation. Owing to that we had planned and performed a fiber optic guided retrograde intubation, where we had kept the fiberoptic bronchoscope in the pharynx keeping larynx and vocal cords in the focus to facilitate the emergence of guide wire through one of the nostrils as well as direct visual confirmation of intubation...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27888824/clinico-radiological-parameters-predicting-early-diagnosis-of-foreign-body-aspiration-in-children
#7
Pradipta Kumar Parida, Nirmal Shanmugasundaram, Surianarayanan Gopalakrishnan
OBJECTIVES: This study aims to investigate clinical and radiological findings to make early diagnosis of foreign body (FB) aspiration in children. PATIENTS AND METHODS: This prospective study was conducted on 45 children younger than 12 years with a clinical diagnosis of FB aspiration undergone rigid bronchoscopy between September 2010 and May 2014. The results of 37 children (22 males, 15 females; mean age 2.6 years; range 1 to 12 years) with positive for FB on bronchoscopy were analyzed...
September 2016: Kulak Burun Boğaz Ihtisas Dergisi: KBB, Journal of Ear, Nose, and Throat
https://www.readbyqxmd.com/read/27888508/outcomes-following-laryngectomy-refusal-after-insufficient-response-to-induction-chemotherapy
#8
Philippe Gorphe, Margarida Matias, Pierre Blanchard, Caroline Even, Charles Ferte, Yungan Tao, Stéphane Temam, François Bidault, François Janot
OBJECTIVE: To review patients who refused a total laryngectomy and were treated with radiotherapy (RT) after insufficient response to induction chemotherapy in a larynx preservation protocol for advanced-stage cancer of the larynx and to compare their outcomes with good responders. STUDY DESIGN: Retrospective cohort study. METHODS: Eighty-six patients treated with induction chemotherapy followed by RT were included in the analysis: 75 good responders and 11 insufficient responders who refused surgery...
November 26, 2016: Laryngoscope
https://www.readbyqxmd.com/read/27886803/relapsing-polychondritis-a-2016-update-on-clinical-features-diagnostic-tools-treatment-and-biological-drug-use
#9
REVIEW
Alexis Mathian, Makoto Miyara, Fleur Cohen-Aubart, Julien Haroche, Miguel Hie, Micheline Pha, Philippe Grenier, Zahir Amoura
Relapsing polychondritis (RP) is a very rare autoimmune disease characterised by a relapsing inflammation of the cartilaginous tissues (joints, ears, nose, intervertebral discs, larynx, trachea and cartilaginous bronchi), which may progress to long-lasting atrophy and/or deformity of the cartilages. Non-cartilaginous tissues may also be affected, such as the eyes, heart, aorta, inner ear and skin. RP has a long and unpredictable course. Because no randomised therapeutic trials are available, the treatment of RP remains mainly empirical...
April 2016: Best Practice & Research. Clinical Rheumatology
https://www.readbyqxmd.com/read/27883179/evidence-that-an-internal-schema-adapts-swallowing-to-upper-airway-requirements
#10
Seng Mun Wong, Rickie J Domangue, Sidney Fels, Christy L Ludlow
Hyoid and laryngeal movements contribute to laryngeal vestibule closure and upper esophageal sphincter opening during swallowing. Evidence of an internal sensorimotor scaling system allowing individuals to achieve these functional goals is lacking. In speech, speakers adjust their articulatory movement magnitude according to the movement distance required to reach an articulatory target for intelligible speech. We investigated if swallowing is similar in that movement amplitude may be scaled by the functional goal for airway protection during swallowing, rather than by head and neck size...
November 24, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/27879493/socioeconomic-status-and-site-specific-cancer-incidence-a-bayesian-approach-in-a-french-cancer-registries-network-study
#11
Joséphine Bryere, Olivier Dejardin, Ludivine Launay, Marc Colonna, Pascale Grosclaude, Guy Launoy
The aim of this study was to identify and compare cancer sites whose incidence is influenced by social deprivation. The study population comprised 189 144 cases of cancer diagnosed between 2006 and 2009, recorded in member registries of the French Network of Cancer Registries. Social environment was assessed at an aggregate level using the European Deprivation Index. The association between incidence and socioeconomic status was assessed by a geographical Bayesian Poisson model enabling a reduction of the overall variability and smoothing of the relative risks by sharing information provided by multiple geographic units...
November 22, 2016: European Journal of Cancer Prevention
https://www.readbyqxmd.com/read/27879438/a-comparison-of-rodent-and-nonrodent-laryngeal-and-tracheal-bifurcation-sensitivities-in-inhalation-toxicity-studies-and-their-relevance-for-human-exposure
#12
Vasanthi Mowat, David J Alexander, Andrew M Pilling
In inhalation toxicity studies, drug-induced lesions are frequently reported in the larynx and sometimes at the tracheal bifurcation (carina) in the rat, but less so in the dog or monkey, bringing into question the relevance of these rodent findings for humans. The rat larynx is widely considered to be more sensitive than that of the dog and monkey in its response to inhaled xenobiotics, although we could find no published data to support this. In this review, data from 52 inhalation studies involving rodent and nonrodent species were collated and reviewed...
November 22, 2016: Toxicologic Pathology
https://www.readbyqxmd.com/read/27876742/-on-the-problem-of-voice-rehabilitation-in-the-case-of-unilateral-vocal-fold-paresis
#13
V V Shilenkova
BACKGROUND: Unilateral vocal fold paresis (UVFP) significantly deteriorates the patient's quality of life. The leading role in the rehabilitation of the patients presenting with UVFP belongs to stimulation therapy which consists in the activation of muscle re-innervation of the larynx and the compensatory mechanisms allowing to achieve the most complete closure of the vocal folds during phonation. AIM: The objective of the present study was the optimization of the conservative treatment of patients with UVFP...
2016: Vestnik Otorinolaringologii
https://www.readbyqxmd.com/read/27876268/vocal-changes-accompanying-the-descent-of-the-larynx-during-ontogeny-from-neonates-to-adults-in-male-and-female-goitred-gazelles-gazella-subgutturosa
#14
Ilya A Volodin, Kseniya O Efremova, Roland Frey, Natalia V Soldatova, Elena V Volodina
The pronouncedly enlarged and descended larynx in male goitred gazelles (Gazella subgutturosa), Mongolian gazelles (Procapra gutturosa) and fallow deer (Dama dama) represents an interesting parallel to the 'Adam's apple' of human males. Goitred gazelles, as humans, are not born with a descended larynx. Therefore the sexual dimorphism of larynx size and position develops during ontogeny. In this study, the vocal ontogeny of male and female goitred gazelles was investigated across five age classes from neonates to adults...
September 12, 2016: Zoology: Analysis of Complex Systems, ZACS
https://www.readbyqxmd.com/read/27873528/transplantation-of-vascularized-composite-allografts-review-of-current-knowledge
#15
M Molitor
Transplantation in reconstructive surgery has been performed for more than 20 years, although the official beginning of these procedures is considered the first successful transplantation of the hand in 1998. The original name "Composite Tissue Transplantation" has been used less frequently; more common is the term "Vascularized Composite Allotransplant", which better describes the basis of the procedure. There have been so far approximately 180 transplantations performed, the exact number is difficult to find...
2016: Acta Chirurgiae Plasticae
https://www.readbyqxmd.com/read/27873325/dynamic-nanomechanical-analysis-of-the-vocal-fold-structure-in-excised-larynges
#16
Gregory R Dion, Paulo G Coelho, Stephanie Teng, Malvin N Janal, Milan R Amin, Ryan C Branski
OBJECTIVES/HYPOTHESIS: Quantification of clinical outcomes after vocal fold (VF) interventions is challenging with current technology. High-speed digital imaging and optical coherence tomography (OCT) of excised larynges assess intact laryngeal function, but do not provide critical biomechanical information. We developed a protocol to quantify tissue properties in intact, excised VFs using dynamic nanomechanical analysis (nano-DMA) to obtain precise biomechanical properties in the micrometer scale...
November 22, 2016: Laryngoscope
https://www.readbyqxmd.com/read/27871805/the-survival-rate-and-larynx-preservation-in-elderly-cancer-patients-who-received-surgical-operation-a-retrospective-cohort-study
#17
Qin Wang, Yehai Liu, Guoqin Hu, Ruokun Wang, Yi Zhao, Ming Zhang
BACKGROUND: To investigate the efficiency of surgical operation for patients over 70 years with hypopharyngeal cancer. MATERIALS AND METHODS: A retrospective analysis of the medical records from 68 patients over 70 years-old with hypopharyngeal cancer who underwent different therapeutic regimen between 2000 and 2009 was conducted. 36 of 68 patients underwent larynx preservation. All patients were treated with surgical operation and adjuvant radiotherapy. A Kaplan-Meier method was employed to calculate the survival rate...
November 15, 2016: International Journal of Surgery
https://www.readbyqxmd.com/read/27871543/soft-palate-trauma-induced-during-glidescope-intubation
#18
Joseph P Allencherril, Linda Joseph
The GlideScope (GVL; Saturn Biomedical Systems, Burnaby, British Columbia, Canada) is a rigid indirect video laryngoscope device that facilitates exposure of the larynx for placement of the endotracheal tube. This blade also reduces the requirement for anterior displacement of the tongue. A unique feature is the acutely angled blade which provides an improved glottic view. Herein, we present 2 instances of soft palate trauma, a rare oropharyngeal complication linked to GlideScope use. In the first case, the GlideScope was used for pedagogical purposes for intubation in a knee surgery...
December 2016: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/27870055/cancer-risks-after-solid-organ-transplantation-and-after-long-term-dialysis
#19
Maria Hortlund, Laila Sara Arroyo Mühr, Hans Storm, Gerda Engholm, Joakim Dillner, Davit Bzhalava
Immunosuppression involves an inability to control virus infections and increased incidence of virus-associated cancers. Some cancers without known viral etiology are also increased, but data on exactly which cancer forms are increased has been inconsistent. To provide a reliable and generalizable estimate, with high statistical power and long follow-up time, we assessed cancer risks using comprehensive, population-based registries in 2 different countries and from 2 different immunosuppressed patient groups (solid organ transplant recipients (OTRs) and long-term dialysis patients (LDPs))...
November 21, 2016: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/27869097/the-impact-of-radiation-treatment-time-on-survival-in-patients-with-head-and-neck-cancer
#20
Talha Shaikh, Elizabeth A Handorf, Colin T Murphy, Ranee Mehra, John A Ridge, Thomas J Galloway
PURPOSE: To assess the impact of radiation treatment time (RTT) in head and neck cancers on overall survival (OS) in the era of chemoradiation. METHODS AND MATERIALS: Patients with diagnoses of tongue, hypopharynx, larynx, oropharynx, or tonsil cancer were identified by use of the National Cancer Database. RTT was defined as date of first radiation treatment to date of last radiation treatment. In the definitive setting, prolonged RTT was defined as >56 days, accelerated RTT was defined as <47 days, and standard RTT was defined as 47 to 56 days...
December 1, 2016: International Journal of Radiation Oncology, Biology, Physics
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