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Preoperative assessment

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https://www.readbyqxmd.com/read/27932961/patient-specific-electric-field-simulations-and-acceleration-measurements-for-objective-analysis-of-intraoperative-stimulation-tests-in-the-thalamus
#1
Simone Hemm, Daniela Pison, Fabiola Alonso, Ashesh Shah, Jérôme Coste, Jean-Jacques Lemaire, Karin Wårdell
Despite an increasing use of deep brain stimulation (DBS) the fundamental mechanisms of action remain largely unknown. Simulation of electric entities has previously been proposed for chronic DBS combined with subjective symptom evaluations, but not for intraoperative stimulation tests. The present paper introduces a method for an objective exploitation of intraoperative stimulation test data to identify the optimal implant position of the chronic DBS lead by relating the electric field (EF) simulations to the patient-specific anatomy and the clinical effects quantified by accelerometry...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27932590/the-accuracy-of-measurements-of-nonmelanoma-skin-cancer-sizes-referred-to-the-mohs-surgery-clinic
#2
Derek To, Jillian Macdonald
BACKGROUND: Tumour size is a crucial factor used to plan Mohs procedures. Larger tumours require more time and stages of excision, and they need to be triaged as a higher priority. Therefore, the accuracy in measurement of tumour size is critical. OBJECTIVE: To investigate if there is a significant difference in accuracy of tumour measurements in referrals between dermatologists and nondermatologists. METHODS AND MATERIALS: Performed a retrospective study of 180 referrals from dermatologists and 47 referrals from nondermatologists to The Ottawa Hospital Riverside Mohs Surgery Clinic...
December 8, 2016: Journal of Cutaneous Medicine and Surgery
https://www.readbyqxmd.com/read/27932533/preoperative-proteinuria-and-reduced-glomerular-filtration-rate-predicts-renal-replacement-therapy-in-patients-supported-with-continuous-flow-left-ventricular-assist-devices
#3
Veli K Topkara, Ellie J Coromilas, Arthur Reshad Garan, Randall C Li, Francesco Castagna, Douglas L Jennings, Melana Yuzefpolskaya, Koji Takeda, Hiroo Takayama, Robert N Sladen, Donna M Mancini, Yoshifumi Naka, Jai Radhakrishnan, Paolo C Colombo
BACKGROUND: Renal failure requiring renal replacement therapy (RRT) has detrimental effects on quality of life and survival of patients with continuous-flow left ventricular assist devices (CF-LVADs). Current guidelines do not offer a decision-making algorithm for CF-LVAD candidates with poor baseline renal function. Objective of this study was to identify risk factors associated with RRT after CF-LVAD implantation. METHODS AND RESULTS: Three hundred and eighty-nine consecutive patients underwent contemporary CF-LVAD implantation at the Columbia University Medical Center between January 2004 and August 2015...
December 2016: Circulation. Heart Failure
https://www.readbyqxmd.com/read/27932505/diagnostic-accuracy-of-t1-weighted-dynamic-contrast-enhanced-mri-and-dwi-adc-for-differentiation-of-glioblastoma-and-primary-cns-lymphoma
#4
X Lin, M Lee, O Buck, K M Woo, Z Zhang, V Hatzoglou, A Omuro, J Arevalo-Perez, A A Thomas, J Huse, K Peck, A I Holodny, R J Young
BACKGROUND AND PURPOSE: Glioblastoma and primary CNS lymphoma dictate different neurosurgical strategies; it is critical to distinguish them preoperatively. However, current imaging modalities do not effectively differentiate them. We aimed to examine the use of DWI and T1-weighted dynamic contrast-enhanced-MR imaging as potential discriminative tools. MATERIALS AND METHODS: We retrospectively reviewed 18 patients with primary CNS lymphoma and 36 matched patients with glioblastoma with pretreatment DWI and dynamic contrast-enhanced-MR imaging...
December 8, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27932045/serum-and-knee-synovial-fluid-matrixmetalloproteinase-13-and-tumor-necrosis-factor-alpha-levels-in-patients-with-late-stage-osteoarthritis
#5
Kenan Özler, Erdem Aktaş, Çiğdem Atay, Barış Yılmaz, Murat Arıkan, Şafak Güngör
OBJECTIVE: To compare the levels of MMP-13 and TNF-α in late stage osteoarthritis, define their predominant pathways and investigate their correlation with McMaster Universities Arthritis Index scores. PATIENTS AND METHODS: A total of 42 patients (mean age 64 ± 8.8) with grade 3 and grade 4 knee osteoarthritis according to Kellegren- Lawrence criteria and who were scheduled for total knee arthroplasty were enrolled in the study. TNF-alpha and MMP-13 levels were measured preoperatively from venous blood samples and intraoperatively from knee synovial fluid via ELISA...
December 5, 2016: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/27931954/younger-patients-have-less-severe-radiographic-disease-and-lower-reported-outcome-scores-than-older-patients-undergoing-total-knee-arthroplasty
#6
Jacob Haynes, Adam Sassoon, Denis Nam, Loren Schultz, James Keeney
BACKGROUND: Total knee arthroplasty (TKA) has been successful for many younger patients, but some experience residual symptoms or dissatisfaction. We performed this study to assess the relationship between radiographic disease severity and patient demographic features on patient reported TKA outcome scores. METHODS: We compared 100 TKAs performed for 82 patients ≤55years old with 100 gender-matched TKAs performed for 85 patients between 65 and 75years old. These study cases represented 25% and 21%, respectively, of TKAs performed between January 2006 and June 2011...
December 5, 2016: Knee
https://www.readbyqxmd.com/read/27931723/psoas-muscle-area-as-a-predictor-of-outcomes-in-transcatheter-aortic-valve-implantation
#7
Lohit Garg, Sahil Agrawal, Timothy Pew, George S Hanzel, Amr E Abbas, Michael J Gallagher, Francis L Shannon, Ivan D Hanson
Frailty is a powerful predictor of outcomes after transcatheter aortic valve implantation (TAVI). Sarcopenia as assessed by psoas muscle area (PMA) is a validated tool to assess frailty before surgical procedures. We evaluated PMA as a predictor of outcomes after TAVI in 152 consecutive patients who underwent this procedure at our institution from 2011 to 2014. Preoperative computed tomography scans were used to measure PMA, which then was indexed to body surface area. Outcomes evaluated included (1) early poor outcome (30 days mortality, stroke, dialysis, and prolonged ventilation), (2) 1-year mortality, and (3) high-resource utilization (length of stay >7 days, discharge to rehabilitation, or readmission within 30 days)...
November 1, 2016: American Journal of Cardiology
https://www.readbyqxmd.com/read/27931701/preoperative-stress-an-operating-room-nurse-intervention-assessment
#8
Ayla Gürsoy, Bahar Candaş, Şirin Güner, Serpil Yılmaz
PURPOSE: The purpose of this research study was to determine the effect of preoperative visits by the operating room (OR) nurse on patient stress levels before undergoing surgery. DESIGN: This research was a quasi-experimental study. METHODS: The research sample included patients (N = 179) who were hospitalized for surgery during 6 months in the general surgery department of a public hospital in the Eastern Black Sea Region. The OR nurse, part of the medical staff for surgery, visited patients in the experimental group 1 day before surgery...
December 2016: Journal of Perianesthesia Nursing: Official Journal of the American Society of PeriAnesthesia Nurses
https://www.readbyqxmd.com/read/27931699/recovery-after-same-day-surgery-in-patients-receiving-general-anesthesia-a-cohort-study-using-the-quality-of-recovery-40-questionnaire
#9
Herdis Sveinsdottir, Thordis Borgthorsdottir, Maria Titia Asgeirsdottir, Kolbrun Albertsdottir, Lara Borg Asmundsdottir
BACKGROUND: The contemporary rise in the number of elective procedures performed in same-day surgery (SDS) requires that health care professionals increase their knowledge of patient satisfaction and recovery, including patient-assessed quality of life. This study investigates the quality of recovery (QoR) of anesthetized SDS patients. METHODS: Data from SDS patients were collected from hospital records at T1 (the morning before operation), T2 (day 1 postsurgery), and T3 (day 4 postsurgery)...
December 2016: Journal of Perianesthesia Nursing: Official Journal of the American Society of PeriAnesthesia Nurses
https://www.readbyqxmd.com/read/27931698/the-effectiveness-of-nurse-led-preoperative-assessment-clinics-for-patients-receiving-elective-orthopaedic-surgery-a-systematic-review
#10
Chan Sau-Man Conny, Ip Wan-Yim
PURPOSE: Nurse-led preoperative assessment clinics (POAC) have been introduced in different specialty areas to assess and prepare patients preoperatively in order to avoid last-minute surgery cancellations. Not all patients are referred to POACs before surgery, and the benefits of nurse-led POACs are not well documented in Hong Kong. The purpose of this systemic review was to identify the best available research evidence to inform current clinical practice, guide health care decision making and promote better care...
December 2016: Journal of Perianesthesia Nursing: Official Journal of the American Society of PeriAnesthesia Nurses
https://www.readbyqxmd.com/read/27931109/giant-symptomatic-pancreatic-cyst-mimicking-a-malignant-tumor
#11
Lucas Souto Nacif, Joana Ferrer Fábrega, Rocío García Pérez, Juan Carlos García-Valdecasas
BACKGROUND: Pancreatic cystic lesions found in the literature are estimated between 2.6-19.6%. These neoplasms are almost exclusively benign tumors, and rarely become malignant. The aim of this paper was to report a feasible total pancreatectomy with portal resection in a giant pancreatic serous cystadenoma mimicking a malignant tumor. CASE PRESENTATION: A healthy 52-year-old female patient presented to us with a giant pancreatic cyst with unknown preoperative diagnosis and a secondary dilatation of the Wirsung duct, and unclear vascular invasion...
December 2016: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/27931029/selective-necrosectomy-for-infected-pancreatic-necrosis
#12
Ola Ahmed, Claire L Donohoe, Daragh B Murphy, Brian J Marsh, John Conneely, Gerry P McEntee
BACKGROUND: Until recently, a diagnosis of infected pancreatic necrosis (IPN) warranted necrosectomy, which was associated with high morbidity and mortality rates greater than 20%. Preoperative percutaneous drainage delayed the need for necrosectomy with improved outcomes. METHODS: In 2008, this institution changed its approach to the management of such cases opting instead for percutaneous drainage with selective deferred necrosectomy. A total of 38 consecutive patients with IPN from January 2008 to December 2014 were included...
December 9, 2016: Digestive Surgery
https://www.readbyqxmd.com/read/27930861/functional-mri-in-seven-borderline-cochlear-implant-candidates-a-preliminary-research-study
#13
F Wagner, S Weder, M D Caversaccio, A Federspiel, R Wiest, P Senn
The indications for cochlear implants (CIs) are constantly expanding, as are the numbers of patients who are not ideal or classical CI candidates. For these patients, a careful decision-making process is needed to minimize the risk of poor outcomes. Preoperatively, it may be unclear whether they will benefit from an implantation. As conventionally performed hearing tests (i.e. subjective and electrophysiological examinations, stapedial reflex testing) have limitations, further objective and effective methods for assessment of the central auditory pathway (CAP) are required [1-3]...
December 8, 2016: Clinical Otolaryngology
https://www.readbyqxmd.com/read/27930792/corneal-thickness-after-smile-affects-scheimpflug-based-dynamic-tonometry
#14
Joaquín Fernández, Manuel Rodríguez-Vallejo, Javier Martínez, Ana Tauste, David P Piñero
PURPOSE: To evaluate the corneal biomechanical changes due to small incision lenticule extraction (SMILE) measured by Scheimpflug-based dynamic tonometry and to assess the impact of the corneal thickness. METHODS: Sixty-eight patients measured with the Corvis ST (Oculus Optikgeräte GmbH, Wetzlar, Germany) preoperatively and 1 month after SMILE were included in this retrospective observational study. Patients were divided into three groups depending on the preoperative spherical equivalent: low from -1...
December 1, 2016: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/27930791/computational-biomechanical-analysis-of-asymmetric-ectasia-risk-in-unilateral-post-lasik-ectasia
#15
Ali Vahdati, Ibrahim Seven, Naveen Mysore, J Bradley Randleman, William J Dupps
PURPOSE: To develop a computational approach to corneal biomechanical risk analysis in refractive surgery and to investigate its utility in an enigmatic case of unilateral ectasia after bilateral LASIK. METHODS: Preoperative corneal elevation datasets from both eyes of a patient who developed unilateral post-LASIK ectasia were used to construct geometrically patient-specific, microstructurally motivated finite element models. Models were assessed before and after implementation of case-specific treatment parameters for interocular differences in corneal geometry and strain behavior under physiological loading conditions...
December 1, 2016: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/27930716/mre11-and-atm-expression-levels-predict-rectal-cancer-survival-and-their-association-with-radiotherapy-response
#16
Vincent Ho, Liping Chung, Maxine Revoltar, Stephanie H Lim, Thein-Ga Tut, Askar Abubakar, Chris J Henderson, Wei Chua, Weng Ng, Mark Lee, Paul De Souza, Matthew Morgan, C Soon Lee, Joo-Shik Shin
BACKGROUND: Aberrant expression of DNA repair proteins is associated with poor survival in cancer patients. We investigated the combined expression of MRE11 and ATM as a predictive marker of response to radiotherapy in rectal cancer. METHODS: MRE11 and ATM expression were examined in tumor samples from 262 rectal cancer patients who underwent surgery for rectal cancer, including a sub-cohort of 54 patients who were treated with neoadjuvant radiotherapy. The relationship between expression of the two-protein panel and tumor regression grade (TRG) was assessed by Mann-Whitney U test and receiver operating characteristics area under curve (ROC-AUC) analysis...
2016: PloS One
https://www.readbyqxmd.com/read/27930598/the-anhepatic-phase-extended-by-temporary-portocaval-shunt-does-not-affect-anesthetic-sensitivity-and-postoperative-cognitive-function-a-case-control-study
#17
Young Gon Son, Sung Hye Byun, Jong Hae Kim
Temporary portocaval shunt (TPCS) prolongs the duration of the anhepatic phase, during which anesthetic sensitivity is highest among the 3 phases of living donor liver transplantation (LDLT). Cognitive dysfunction has been associated with increased anesthetic sensitivity and poor hepatic function. Therefore, we assessed anesthetic sensitivity to desflurane and perioperative cognitive function in patients undergoing LDLT, in whom the duration of the anhepatic phase was extended by TPCS to test the hypothesis that the prolonged anhepatic phase increases anesthetic sensitivity and causes postoperative cognitive decline...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27929699/elucidating-trainee-effect-on-outcomes-for-general-gynecologic-and-urologic-oncology-procedures
#18
Megan Sippey, Konstantinos Spaniolas, Kevin R Kasten
BACKGROUND AND OBJECTIVES: Surgical complications delay adjuvant therapy in oncology patients. Current literature remains unclear regarding resident effect on postoperative outcomes, with inappropriate coverage possibly endangering patients in spite of attending oversight. We assessed resident postgraduate year (PGY) effect on 30-day overall morbidity in cancer patients undergoing major intra-abdominal and non-abdominal surgery. METHODS: Patients undergoing non-emergent major intra- and extra-abdominal operations from 2005-2012 were queried using the American College of Surgeons' National Surgical Quality Improvement Program...
December 8, 2016: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/27928855/impact-of-laparoscopic-ovarian-detorsion-on-ovarian-reserve
#19
Cenk Yasa, Ozlem Dural, Ercan Bastu, Masallah Zorlu, Omer Demir, Funda Gungor Ugurlucan
AIM: The aim of this study was to evaluate ovarian reserve after laparoscopic ovarian detorsion in patients with ovarian torsion. METHODS: From February 2014 to September 2015, a total of 11 patients with ovarian torsion underwent laparoscopic detorsion. These 11 patients were eligible for study, and ovarian reserve was assessed on serum anti-Müllerian hormone (AMH) and by antral follicle count preoperatively, and in postoperative months 1 and 3. RESULTS: Mean patient age was 25...
December 8, 2016: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/27928795/-assessment-value-of-preoperative-platelet-lymphocyte-ratio-in-the-prognosis-of-patients-with-gastric-mixed-adenoneuroendocrine-carcinoma
#20
Longlong Cao, Jun Lu, Jianxian Lin, Chaohui Zheng, Ping Li, Jianwei Xie, Jiabin Wang, Qiyue Chen, Mi Lin, Ruhong Tu, Changming Huang
OBJECTIVE: To explore the prognostic assessment value of preoperative blood platelet-lymphocyte ratio (PLR) in patients with gastric mixed adenoneuroendocrine carcinoma (gMANEC) treated with radical surgery. METHODS: Clinical and pathological data of 84 gMANEC patients who underwent radical resection from 2006 to 2016 in Department of Gastric Surgery, Fujian Medical University Union Hospital were analyzed retrospectively. Receiver operating characteristic (ROC) curve analysis was performed to determine the cutoff value of the PLR for predicting prognosis...
November 25, 2016: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
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