18 results match your criteria orifice millimeters

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Transvaginal primary layered repair of postsurgical urethrovaginal fistula.

Int Urogynecol J 2021 Jul 5;32(7):1941-1943. Epub 2021 May 5.

ASST Monza, Ospedale San Gerardo, via G.B. Pergolesi, 33 20900, Monza, Italy.

Introduction And Hypothesis: Urethrovaginal fistula (UVF) is a rare disorder, which implies the presence of an abnormal communication between the urethra and the vagina.

Methods: Surgical repair options include transurethral, transabdominal and transvaginal procedures, either with or without tissue interposition. The vaginal route is considered a safe and effective option to correct UVF. Read More

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The Value and Application of Personalized Needle Modification in Percutaneous Infrazygomatic Radiofrequency in Isolated Maxillary Nerve Pain through the Foramen Rotundum.

Pain Physician 2019 07;22(4):377-387

First Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang Province, China.

Background: Percutaneous infrazygomatic radiofrequency (PIR) is a common approach used to block isolated maxillary nerve (V2) pain through the foramen rotundum (FR) in patients with trigeminal neuralgia (TN). Nevertheless, when using this method, there is a risk of accidental penetration of the superior orbital fissure (SOF) and the optic canal (OC) that may result in the injury of the vessels and nerves in that area, and in some severe cases may lead to blindness. According to the blocking of the external orifice of the FR and whether a curved needle was used, combined angle deviation from the path of percutaneous infrazygomatic approach, the FR to the SOF or the OC in the treatment of V2 pain, in which no research has reported the angle, we analyzed the value and application of personalized needle modification in PIR in isolated maxillary nerve pain through the FR. Read More

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Drug distribution transients in solution and suspension-based pressurised metered dose inhaler sprays.

Int J Pharm 2019 Jul 4;566:463-475. Epub 2019 Jun 4.

Laboratory for Turbulence Research in Aerospace & Combustion, Dept. Mechanical & Aerospace Engineering, Monash University, Australia.

This paper presents in situ time-resolved drug mass fraction measurements in pressurised metered dose inhaler (PMDI) sprays, using a novel combination of synchrotron X-ray fluorescence and scattering. Equivalent suspension and solution formulations of ipratropium bromide in HFA-134a propellant were considered. Measurements were made both inside the expansion chamber behind the nozzle orifice, and in the first few millimeters of the spray where droplet and particle formation occur. Read More

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Time- and spatially resolved emission spectroscopy of the dielectric barrier discharge for soft ionization sustained by a quasi-sinusoidal high voltage.

Anal Bioanal Chem 2015 Sep 16;407(22):6689-96. Epub 2015 Jun 16.

Institute of Physics, Bijenicka 46, 10000, Zagreb, Croatia,

A helium capillary dielectric barrier discharge was investigated by means of time-resolved optical emission spectroscopy with the aim of elucidating the process of the formation of the plasma jet. The helium emission line at 706 nm was utilized to monitor spatial and temporal propagation of the excitation of helium atoms. The discharge was sustained with quasi-sinusoidal high voltage, and the temporal evolution of the helium atomic emission was measured simultaneously with the discharge current. Read More

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September 2015

Peroral endoscopic myotomy (POEM) for esophageal primary motility disorders: analysis of 100 consecutive patients.

J Gastrointest Surg 2015 Jan 3;19(1):161-70; discussion 170. Epub 2014 Sep 3.

Foundation for Surgical Innovation and Education, 4805 NE Glisan St., Suite 6N60, Portland, OR, 97213, USA.

Introduction: Peroral endoscopic myotomy (POEM) is a flexible endoscopic approach to the lower esophageal sphincter (LES) providing access for a myotomy to relieve dysphagia. The technique has been adopted worldwide due to reports of excellent short-term clinical outcomes. We report on a consecutive patient cohort with clinical and objective outcomes representing the establishment of a POEM program within a busy esophageal surgical practice. Read More

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January 2015

Effect of intra-orifice depth on sealing ability of four materials in the orifices of root-filled teeth: an ex-vivo study.

Int J Dent 2012 22;2012:318108. Epub 2012 May 22.

Department of Restorative Dentistry, Faculty of Dentistry, King Abdulaziz University, Jeddah 21589, Saudi Arabia.

Aim. To investigate the effect of orifice cavity depth on the sealing ability of Fusio, Fuji II, Fuji IX, and MTA"G". Materials and Methods. Read More

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A system for video-based navigation for endoscopic endonasal skull base surgery.

IEEE Trans Med Imaging 2012 Apr 18;31(4):963-76. Epub 2011 Nov 18.

Department of Computer Science, Johns Hopkins University, Baltimore, MD 21218, USA.

Surgeries of the skull base require accuracy to safely navigate the critical anatomy. This is particularly the case for endoscopic endonasal skull base surgery (ESBS) where the surgeons work within millimeters of neurovascular structures at the skull base. Today's navigation systems provide approximately 2 mm accuracy. Read More

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Venous valves and major superficial tributary veins near the saphenofemoral junction.

J Vasc Surg 2009 Jun;49(6):1562-9

Molecular and Cell Biology Division, Institute for Biomedical Aging Research, Austrian Academy of Sciences, Innsbruck, Austria.

Background: Venous valves are still discussed controversially, mainly because it is still uncertain whether primarily missing or insufficient valves or the weakness of the venous walls cause varices. Furthermore, the distribution and frequencies of major superficial tributary veins (MSTVs), which should discharge the great saphenous vein (GSV) between the terminal (TV) and preterminal valve (PTV) gain in importance; a fortiori as remaining MSTVs during primary varicose vein treatment may be a reason of future recurrent varicose veins. Therefore, the aim of this study was to investigate both the frequency and position of the GSV valves and the distribution of MSTVs near the saphenofemoral junction (SFJ). Read More

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Comparison of eight prosthetic aortic valves in a cadaver model.

J Thorac Cardiovasc Surg 2007 Dec 29;134(6):1526-32. Epub 2007 Oct 29.

Department of Cardiothoracic Surgery, Hahnemann University Hospital, Drexel University College of Medicine, Philadelphia, Pa.

Objectives: Proper valve selection is critical to ensure appropriate valve replacement for patients, because implantation of a small valve might place the patient at risk for persistent gradients. Labeled valve size is not the same as millimeter measure of prosthetic valve diameters or the annulus into which it will fit. Studies that use the labeled valve size in lieu of actual measured diameter in millimeters to compare different valves might be misleading. Read More

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December 2007

Factors influencing the technical difficulty of endoscopic clearance of bile duct stones.

Gastrointest Endosc 2007 Dec 22;66(6):1154-60. Epub 2007 Oct 22.

Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.

Background: There has been no report concerning the factors that contribute to the technical difficulty of endoscopic clearance of common bile duct (CBD) stones.

Objective: Our purpose was to determine the factors that contribute to the technical difficulty of endoscopic clearance of CBD stones.

Design: Prospective study. Read More

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December 2007

Influence of different methods of cervical flaring on establishment of working length.

J Appl Oral Sci 2006 Oct;14(5):351-4

University of Passo Fundo - FO-UPF.

Objective: To investigate the influence of three different rotary systems for cervical flaring on establishment of the real working length.

Material And Methods: Thirty mandibular first molars were submitted to conventional endodontic access and initial working length measurement, followed by irrigation/suction of the pulp chamber with 5% sodium hypochlorite. Teeth were randomly divided into 3 groups (n=10) and cervical flaring of the mesiobuccal canals were performed using one of the following instrument systems: Group 1 - Gates-Glidden burs; Group 2 - Orifice Openers; Group 3 - La Axxess system. Read More

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October 2006

Histological study of periradicular tissue responses to uninfected and infected devitalized pulps in dogs.

J Endod 2006 Jan;32(1):34-8

Department of Endodontics, Advanced Education Program in Endodontics, New York University College of Dentistry, New York, NY 10010, USA.

Uninfected necrotic tissue, such as that which follows a myocardial or cerebral infarct, is capable of inducing an inflammatory reaction. Eventually, the infarct is organized by granulation tissue. Why then, does uninfected devitalized pulp tissue, such as in traumatized teeth, not cause periradicular inflammation and does not become organized by granulation tissue? Four beagle dogs were used in this experiment. Read More

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January 2006

Flow velocities after carotid artery stenting: impact of stent design. A fluid dynamics study in a carotid artery model with laser Doppler anemometry.

Cardiovasc Intervent Radiol 2005 Jan-Feb;28(1):66-76

Department of Interventional Radiology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.

Purpose: To study the influence of a newly developed membrane stent design on flow patterns in a physiologic carotid artery model.

Methods: Three different stents were positioned in silicone models of the carotid artery: a stainless steel stent (Wall-stent), a nitinol stent (SelfX), and a nitinol stent with a semipermeable membrane (MembraX). To increase the contact area of the membrane with the vessel wall, another MembranX model was modified at the outflow tract. Read More

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Value of proximal regurgitant jet size in tricuspid regurgitation.

Am Heart J 1996 Apr;131(4):742-7

Centro de Investigacion Cardiocirculatoria, Hospital La Fe, Valencia, Spain.

Recent studies have shown good agreement between proximal regurgitant jet size obtained with transthoracic color flow mapping and regurgitant fraction in patients with mitral regurgitation. To evaluate this in patients with tricuspid regurgitation, we analyzed 40 patients in sinus rhythm, 16 with free jets and 24 with impinging jets, comparing proximal jet size (millimeters) with parameters derived from the Doppler two-dimensional echocardiographic method (regurgitant fraction) and the flow-convergence method (peak flow rate, effective regurgitant orifice area, and momentum). Good agreement was noted between peak flow rate (r = 0. Read More

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Tubal and tympanic openings of the peritubal cells: implications for cerebrospinal fluid otorhinorrhea.

Am J Otol 1996 Mar;17(2):335-9

Department of Otology and Laryngology, Harvard Medical School, Boston, Massachusetts, USA.

Cerebrospinal fluid otorhinorrhea after surgery for cerebellopontine angle tumors may persist despite obliteration of the mastoid, middle ear, and tympanic orifice of the eustachian tube. In this study, histologic sections of 120 adult temporal bones were examined by light microscopy to determine the incidence of peritubal pneumatization and to demonstrate the frequency of tubal and tympanic openings of the peritubal cells. The results of this study suggest that the pathway for these persistent cerebrospinal fluid leaks may be via the peritubal cells that open directly into the eustachian tube anterior to its tympanic orifice. Read More

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Evaluation of cardiac motion and function by cine magnetic resonance imaging.

Jpn Circ J 1992 Jun;56(6):632-8

Department of Radiological Technology, Fujita Health University School of Health Sciences, Toyoake, Japan.

Cardiac cine magnetic resonance imaging (MRI) was studied to evaluated the cardiac motion and function, and a water-stream phantom study was performed to clarify whether it was possible to quantitatively assess the valvular regurgitation flow by the size of the flow void. In normal subjects, the left ventricular (LV) epicardial apex swung up to the base only a few millimeters, and the mitral annulus ring moved about 14 mm as mean value toward the apex during systole. Those motions of mitral annulus ring may contribute to the left atrial filling. Read More

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Duct endoscopy and endoscopic biopsy in the evaluation of nipple discharge.

Breast Cancer Res Treat 1991 Aug;18(3):179-87

Department of Pathology, Cancer Institute, Tokyo, Japan.

Microdochectomy is usually performed on patients with nipple discharge caused by intraductal proliferative lesions, such as intraductal papilloma and carcinoma. But this operation often sacrifices large amounts of normal mammary gland even when the lesion is a benign intraductal papilloma a few millimeters in diameter. We have developed duct endoscopy for the mammary duct system, and have reliably performed biopsies for intraductal proliferative lesions intraductally. Read More

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Value and limitations of proximal jet dimensions for the quantitation of valvular regurgitation: an in vitro study using Doppler flow imaging.

J Am Soc Echocardiogr 1991 Jan-Feb;4(1):57-66

Second Department of Internal Medicine/Cardiology, Krankenhaus der Barmherzigen Schwestern, Linz, Austria.

To evaluate usefulness and limitations of proximal jet dimensions for the quantitation of valvular regurgitation, fluid jets were created in a pulsatile flow model, and proximal jet width and cross-sectional area were measured by means of color Doppler flow imaging. When circular orifices with diameters from 1 to 6 mm were studied, jet width and cross-sectional jet area measured as close as possible to the orifice were directly related to the orifice diameter (r = 0.97; standard error of the estimate, 0. Read More

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