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intra-operative ultrasound

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https://www.readbyqxmd.com/read/29318179/preoperative-ultrasonography-is-unreliable-in-predicting-hamstring-tendon-graft-diameter-for-acl-reconstruction
#1
Amit M Momaya, Clint Beicker, Paul Siffri, Michael J Kissenberth, Jeffrey Backes, Lane Bailey, Gabriel J Rulewicz, Jennifer M Mercuri, E Carlisle Shealy, John M Tokish, Charles A Thigpen
Background: Hamstring autograft size <8 mm has been shown to be a predictor for failure after anterior cruciate ligament (ACL) reconstruction. The ability to predict graft size preoperatively is helpful in counseling patients about the possible need for graft augmentation. Purpose: To determine whether preoperative ultrasound (US) measurements of hamstring tendons can predict intraoperative graft diameter during ACL reconstruction. Study Design: Cohort study (diagnosis); Level of evidence, 2...
January 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29316227/a-convenient-ultrasound-assisted-saponification-for-the-simultaneous-determination-of-vitamin-e-isomers-in-vegetable-oil-by-hplc-with-fluorescence-detection
#2
Yi Yang, Dan Lu, Shuo Yin, Danni Yang, Yaling Chen, Yongxin Li, Chengjun Sun
An efficient ultrasound-assisted saponification was developed for simultaneous determination of vitamin E isomers in vegetable oil by high-performance liquid chromatography with fluorescence detection. The samples were saponified ultrasonically with potassium hydroxide solution for only 7 min, then the analytes were extracted with ether. Vitamin E isomers were separated on a C18 column at 25°C with a mobile phase of methanol/acetonitrile (81:19, v/v) at a flow rate of 0.8 mL min-1 . Fluorescence detection was operated at 290 nm of excitation wavelength and 327 nm of emission wavelength...
January 8, 2018: Journal of Separation Science
https://www.readbyqxmd.com/read/29313397/detection-of-extrascleral-extension-in-uveal-melanoma-with-histopathological-correlation
#3
Christopher K H Burris, Vasilios P Papastefanou, Caroline Thaung, Marie Restori, Amit K Arora, Mandeep S Sagoo, Victoria M L Cohen
PURPOSE: Uveal melanoma is the most common primary intraocular malignancy. Extrascleral extension (ESE) is rare, but associated with an increased rate of orbital recurrence and an overall poor prognosis. Clinical studies show low rates when compared with histological studies. Due to the prognostic importance of ESE, we sought to compare our clinical, intraoperative, and histological detection rates. DESIGN: A retrospective cross-sectional case series. METHODS: A list of eyes enucleated for uveal melanoma was compiled from the admissions records of the London Ocular Oncology Service during the 28-month period, i...
January 9, 2018: Orbit
https://www.readbyqxmd.com/read/29299739/nonlinear-deformation-of-tractography-in-ultrasound-guided-low-grade-gliomas-resection
#4
Yiming Xiao, Live Eikenes, Ingerid Reinertsen, Hassan Rivaz
PURPOSE: In brain tumor surgeries, maximum removal of cancerous tissue without compromising normal brain functions can improve the patient's survival rate and therapeutic benefits. To achieve this, diffusion MRI and intra-operative ultrasound (iUS) can be highly instrumental. While diffusion MRI allows the visualization of white matter tracts and helps define the resection plan to best preserve the eloquent areas, iUS can effectively track the brain shift after craniotomy that often renders the pre-surgical plan invalid, ensuring the accuracy and safety of the intervention...
January 3, 2018: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/29290254/prevalence-of-nodal-metastases-in-lymph-node-stations-8-9-in-a-large-uk-lung-cancer-surgical-centre-without-routine-pre-operative-eus-nodal-staging
#5
Matthew Evison, Tim Edwards, Haval Balata, Alex Tempowski, Benjamin Teng, Paul Bishop, Eustace Fontaine, Piotr Krysiak, Kandadai Rammohan, Rajesh Shah, Philip Crosbie, Richard Booton
INTRODUCTION: Endoscopic ultrasound (EUS) allows access to the inferior mediastinal lymph node stations (8 and 9) which are beyond the reach of endobronchial ultrasound (EBUS). The addition of EUS to EBUS procedures requires cost and resource investment. This study sought to describe the prevalence of station 8/9 nodal metastases from intra-operative lymph node sampling in a UK region where routine pre-operative EUS is not available. METHODS: A retrospective review of all lung cancer resections at the University Hospital South Manchester from 2011 to 2014...
January 2018: Lung Cancer: Journal of the International Association for the Study of Lung Cancer
https://www.readbyqxmd.com/read/29278582/computer-assisted-surgery-virtual-and-augmented-reality-displays-for-navigation-during-urological-interventions
#6
Matthias N van Oosterom, Henk G van der Poel, Nassir Navab, Cornelis J H van de Velde, Fijs W B van Leeuwen
PURPOSE OF REVIEW: To provide an overview of the developments made for virtual- and augmented-reality navigation procedures in urological interventions/surgery. RECENT FINDINGS: Navigation efforts have demonstrated potential in the field of urology by supporting guidance for various disorders. The navigation approaches differ between the individual indications, but seem interchangeable to a certain extent. An increasing number of pre- and intra-operative imaging modalities has been used to create detailed surgical roadmaps, namely: (cone-beam) computed tomography, MRI, ultrasound, and single-photon emission computed tomography...
December 22, 2017: Current Opinion in Urology
https://www.readbyqxmd.com/read/29244271/laparoscopic-dismembered-pyeloplasty-combined-with-port-entrance-flexible-renoscopic-lithotripsy
#7
Kaan Gokcen, Gokhan Gokce, Gokce Dundar, Resul Cicek, Halil Gulbahar, Emin Yener Gultekin
INTRODUCTION: Ureteropelvic junction obstruction and concomitant calculus disease may coexist. We demonstrate our use of flexible renoscopy during laparoscopic pyeloplasty for caliceal stone removal. PATIENT AND METHODS: A 28-year-old female patient presented with recurrent attacks of flank pain of two years duration. When noncontrast-CT and DTPA were performed, the patient was diagnosed with ureteropelvic junction stenosis and 3 stones with a total burden of 14mm in the lower pole of right kidney...
December 18, 2017: International Braz J Urol: Official Journal of the Brazilian Society of Urology
https://www.readbyqxmd.com/read/29241056/segmentation-of-arterial-walls-in-intravascular-ultrasound-cross-sectional-images-using-extremal-region-selection
#8
Mehdi Faraji, Irene Cheng, Iris Naudin, Anup Basu
Intravascular Ultrasound (IVUS) is an intra-operative imaging modality that facilitates observing and appraising the vessel wall structure of the human coronary arteries. Segmentation of arterial wall boundaries from the IVUS images is not only crucial for quantitative analysis of the vessel walls and plaque characteristics, but is also necessary for generating 3D reconstructed models of the artery. The aim of this study is twofold. Firstly, we investigate the feasibility of using a recently proposed region detector, namely Extremal Region of Extremum Level (EREL) to delineate the luminal and media-adventitia borders in IVUS frames acquired by 20 MHz probes...
December 6, 2017: Ultrasonics
https://www.readbyqxmd.com/read/29207325/prediction-of-miscarriage-in-women-with-viable-intrauterine-pregnancy-a-systematic-review-and-diagnostic-accuracy-meta-analysis
#9
REVIEW
Rekha N Pillai, Justin C Konje, Matthew Richardson, Douglas G Tincello, Neelam Potdar
Both ultrasound and biochemical markers either alone or in combination have been described in the literature for the prediction of miscarriage. We performed this systematic review and meta-analysis to determine the best combination of biochemical, ultrasound and demographic markers to predict miscarriage in women with viable intrauterine pregnancy. The electronic database search included Medline (1946-June 2017), Embase (1980-June 2017), CINAHL (1981-June 2017) and Cochrane library. Key MESH and Boolean terms were used for the search...
January 2018: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/29205687/ultrasound-guided-pudendal-nerve-block-in-children-a-new-technique-of-ultrasound-guided-transperineal-approach
#10
Isabelle Gaudet-Ferrand, Pablo De La Arena, Sophie Bringuier, Olivier Raux, Laurent Hertz, Nicolas Kalfa, Chrystelle Sola, Christophe Dadure
BACKGROUND: Transperineal pudendal nerve block guided by nerve stimulator is used in pediatric anesthesia as an alternative to caudal analgesia in perineal surgery. The risk of rectal puncture or intravascular injection is inherent to this blinded technique. We described a new technique of transperineal pudendal nerve block, with ultrasound guidance, to improve safety of the technique. AIMS: The first goal of this study was to describe this new technique and to test its feasibility...
December 5, 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/29195681/compression-sonography-for-non-invasive-measurement-of-lower-leg-compartment-pressure-in-an-animal-model
#11
Andreas Bloch, Corina Tomaschett, Stephan Jakob, Andreas Schwinghammer, Timo Schmid
INTRODUCTION: Compression ultrasound is a non-invasive technique allowing for qualitative visualization and quantitative measurements of mechanical tissue properties. In acute compartment syndrome (ACS), cadaver studies have proven that the intra-compartmental pressure (ICP) measured by compression sonography correlates with the ICP measured invasively. This study aimed to evaluate compression sonography for compartment pressure measurements in an animal model. MATERIAL AND METHODS: The pressure in the anterior tibial compartment of 6 domestic pig legs was increased from baseline to 40mmHg in 5mmHg steps...
November 27, 2017: Injury
https://www.readbyqxmd.com/read/29184666/intra-operative-ultrasound-based-augmented-reality-guidance-for-laparoscopic-surgery
#12
Rohit Singla, Philip Edgcumbe, Philip Pratt, Christopher Nguan, Robert Rohling
In laparoscopic surgery, the surgeon must operate with a limited field of view and reduced depth perception. This makes spatial understanding of critical structures difficult, such as an endophytic tumour in a partial nephrectomy. Such tumours yield a high complication rate of 47%, and excising them increases the risk of cutting into the kidney's collecting system. To overcome these challenges, an augmented reality guidance system is proposed. Using intra-operative ultrasound, a single navigation aid, and surgical instrument tracking, four augmentations of guidance information are provided during tumour excision...
October 2017: Healthcare Technology Letters
https://www.readbyqxmd.com/read/29182900/laparoscopic-sleeve-gastrectomy-for-morbid-obesity-role-of-intraluminal-and-intraperitoneal-postoperative-drainage
#13
G Currò, G Piscitelli, C Lazzara, I Komaei, A Fortugno, G Pinto, F Guccione, A Cogliandolo, A Dattola, S Latteri, G Navarra
BACKGROUND AND AIMS: Bleeding and staple line leak are the most common postoperative complications of LSG. To prevent and/or to promptly identify such complications, conventional peri-operative protocols imply post-operative gastric decompression (NGT) and staple line drain (IAD). Our aim was to evaluate the role of naso-gastric tube (NGT) and intra-abdominal drain (IAD) in preventing and/or facilitating identification and treatment of post-operative complications after sleeve gastrectomy...
July 2017: Il Giornale di Chirurgia
https://www.readbyqxmd.com/read/29182210/the-role-of-point-of-care-ultrasound-in-intra-abdominal-hypertension-management
#14
Bruno M Pereira, Renato G Pereira, Robert Wise, Gavin Sugrue, Tanya L Zachrison, Alcir E Dorigatti, Rossano K Fiorelli, Manu L N G Malbrain
BACKGROUND: Intra-abdominal hypertension is a common complication in critically ill patients. Recently the Abdominal Compartment Society (WSACS) developed a medical management algorithm with a stepwise approach according to the evolution of the intra-abdominal pressure and aiming to keep IAP ≤ 15 mm Hg. With the increased use of ultrasound as a bedside modality in both emergency and critical care patients, we hypothesized that ultrasound could be used as an adjuvant point-of-care tool during IAH management...
November 28, 2017: Anaesthesiology Intensive Therapy
https://www.readbyqxmd.com/read/29179012/reproducibility-of-the-transvaginal-sonographic-assessment-of-bladder-wall-thickness
#15
Suneetha Rachaneni, Lee Middleton, Anuradha Sajja, Moji Balogun, Jane Daniels, Pallavi Latthe, Jonathan Deeks
OBJECTIVE: To assess whether transvaginal sonographic measurements of bladder wall thickness (BWT) have adequate reproducibility to detect differences in BWT potentially indicative of detrusor overactivity in women with overactive bladder. STUDY DESIGN: Three reproducibility studies were undertaken to assess (A) total measurement error, (B) intra-observer variability and (C) inter-observer measurement in the interpretation of scans. Women recruited to the Bladder Ultrasound Study underwent a transvaginal ultrasound scan to obtain a measurement of BWT...
January 2018: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/29165431/spinal-accessory-nerve-preservation-in-modified-neck-dissections-surgical-and-functional-outcomes
#16
V Popovski, A Benedetti, D Popovic-Monevska, A Grcev, A Stamatoski, J Zhivadinovik
The spinal accessory nerve (SAN) or XI cranial nerve is frequently encountered during neck surgery, and as such is at risk of iatrogenic injury, resulting in "shoulder syndrome". Modified neck dissection (MND) with preservation of the SAN is based on desire to minimise the functional deformity associated with section of the eleventh nerve. The aim of this study was to analyse the intra-operative variations of the spinal accessory nerve pathway and to evaluate shoulder dysfunction postoperatively. The cross-sectional demonstration analysis was created through the medical records retrospectively of 165 consecutive patients who underwent neck dissections at our institution in the past 5 years with attention to ultrasound and MRI preoperative findings, type of neck dissection, type of identification and dissection of SAN, postoperative morbidity and survival rate...
October 2017: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/29114280/comparison-of-stereotactic-and-ultrasound-guided-biopsy-of-solid-supratentorial-tumor-a-preliminary-report
#17
Guru Dutta Satyarthee, P Sarat Chandra, Bhawani S Sharma, V S Mehta
Introduction: The computed tomography (CT) guided stereotactic biopsy (STB) is considered as method of choice for biopsy of intracranial mass lesions. However, it's disadvantages are frame fixation, time requirement for transportation between CT scan suit to the operation theater with added much higher equipment cost in the relatively resource scarred developing country. Ultrasound-guided biopsy (USGB) is relatively simpler, economical, less time consuming, and real-time procedure. Clinical Materials and Methods: Thirty-seven consecutively admitted patients with supratentorial brain tumors, who underwent biopsy of the lesion using CT compatible stereotactic and ultrasound-guided (USGB) procedure formed cohort of the study...
October 2017: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/29111161/effect-of-low-intensity-pulsed-ultrasound-on-joint-injury-and-post-traumatic-osteoarthritis-an-animal-study
#18
Talal Zahoor, Reed Mitchell, Priya Bhasin, Yi Guo, Sharada Paudel, Lew Schon, Zijun Zhang
This study investigated the therapeutic potential of low-intensity pulsed ultrasound (LIPUS) in post-traumatic osteoarthritis (PTOA). Intra-articular fracture of the medial tibial plateau was surgically created in 30 rats. LIPUS was applied to the operated joints either for the first 2 wk (LIPUS1-2 group) or in weeks 4 and 5 after intra-articular fracture (LIPUS4-5 group). In controls, the operated knees were not treated with LIPUS (LIPUS0 group). The rats were monitored with weekly gait analysis and euthanized at week 8...
October 27, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29038858/surgical-management-of-primary-hyperparathyroidism
#19
Stephen Ryan, Danielle Courtney, Julia Moriariu, Conrad Timon
We reviewed the surgical management of primary hyperparathyroidism through a retrospective chart review of 200 parathyroidectomy procedures performed over a 12 year period. Epidemiological data and accuracy of radiological investigations used in identifying pathological parathyroid tissue location were assessed. We determined how often simultaneous removal of thyroid tissue was required during parathyroidectomy and the associated pathology. Radiology reports were screened to determine if confirmed thyroid pathology from histological specimens were referenced pre-operatively...
December 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/29022481/intra-and-interobserver-variability-of-intrapartum-transperineal-ultrasound-measurements-with-contraction-and-pushing
#20
José A Sainz, Ana Fernández-Palacín, Carlota Borrero, Adriana Aquise, Zenaida Ramos, José A García-Mejido
The aim of this study was to evaluate the inter- and intraobserver correlation of the different intrapartum-transperineal-ultrasound-parameters(ITU) (angle of progression (AoP), progression-distance (PD), head-direction (HD), midline-angle (MLA) and head-perineum distance (HPD)) with contraction and pushing. We evaluated 28 nulliparous women at full dilatation under epidural analgesia. We performed a transperineal ultrasound evaluating AoP and PD in the longitudinal plane, and MLA and HPD in the transverse plane...
October 12, 2017: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
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