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Doucette TA, Kong LY, Yang Y, Wei J, Wang J, Fuller GN, Heimberger AB, Rao G, Ajewung N, Kamnasaran D, Katz AM, Amankulor N, Squatrito M, Hambardzumyan D, Holland EC, Poschl J, Lorenz A, Von Bueren A, Li S, Peraud A, Tonn JC, Herms J, Xiang M, Rutkowski S, Kretzschmar H, Schuller U, Studebaker A, Raffel C, Aoki Y, Hashizume R, Ozawa T, Gupta N, James CD, Navis AC, Hamans BC, Claes A, Heerschap A, Wesseling P, Jeuken JW, Leenders WP, Agudelo PA, Williams S, Nowicki MO, Johnson J, Li PK, Chiocca EA, Lannutti JJ, Lawler SE, Viapiano MS, Bergeron J, Aliaga A, Bedell B, Soderquist C, Sonabend A, Lei L, Crisman C, Yun JP, Sisti J, Castelli M, Bruce JN, Canoll P, Kirsch M, Stelling A, Salzer R, Krafft C, Schackert G, Steiner G, Balvers RK, van den Hengel SK, Wakimoto H, Hoeben RC, Leenstra S, Dirven CM, Lamfers ML, Sabha NS, Agnihotri S, Wolf A, von Deimling A, Croul S, Guha A, Trojahn US, Lenferink A, Bedell B, O'Connor-McCourt M, Wakimoto H, Kanai R, Curry WT, Yip S, Barnard ZR, Mohapatra G, Stemmer-Rachamimov AO, Martuza RL, Rabkin SD, Binder ZA, Salmasi V, Lim M, Weingart J, Brem H, Olivi A, Riggins GJ, Gallia GL, Rong Y, Zhang Z, Gang C, Tucker-Burden C, Van Meir E, Brat DJ, Balvers RK, Kloezeman JJ, Kleijn A, French PJ, Dirven CM, Leenstra S, Lamfers ML, Balvers RK, Kloezeman JJ, Spoor JK, Dirven CM, Lamfers ML, Leenstra S, Bazzoli E, Fomchenko EI, Schultz N, Brennan C, DeAngelis LM, Holland EC, Nimer SD, Squatrito M, Mohyeldin A, Hsu W, Shah SR, Adams H, Shah P, Katuri L, Kosztowski T, Loeb DM, Wolinsky JP, Gokaskan ZL, Quinones-Hinojosa A, Daphu IK, Immervoll H, Bjerkvig R, Thorsen F, Caretti V, Idema S, Zondervan I, Meijer DH, Lagerweij T, Barazas M, Vos W, Hamans B, van der Stoop P, Hulleman E, van der Valk P, Bugiani M, Wesseling P, Vandertop WP, Noske D, Kaspers GJ, Molthoff C, Wurdinger T, Chow LM, Endersby R, Zhu X, Rankin S, Qu C, Zhang J, Ellison DW, Baker SJ, Tabar V, LaFaille F, Studer L. Tumor Models (In Vivo/In Vitro). Neuro Oncol 2010. [DOI: 10.1093/neuonc/noq116.s20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Amthor A, Lorenz A, Zschaeck S, Ament C. Fourth Order Motion Profile Planning for High Precision Applications. ROBOTICS 2010. [DOI: 10.2316/p.2010.703-001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Frank-Raue K, Döhring J, Scheumann G, Rondot S, Lorenz A, Schulze E, Dralle H, Raue F, Leidig-Bruckner G. New Mutations in the RET Protooncogene-L881V – Associated with Medullary Thyroid Carcinoma and -R770Q – in a Patient with Mixed Medullar/Follicular Thyroid Tumour. Exp Clin Endocrinol Diabetes 2009; 118:550-3. [DOI: 10.1055/s-0029-1241851] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Sternfeld T, Lorenz A, Schmid M, Schlamp A, Demmelmair H, Koletzko B, Bogner J. [(13)C]Methionine breath test as a marker for hepatic mitochondrial function in HIV-infected patients. AIDS Res Hum Retroviruses 2009; 25:1243-8. [PMID: 20001311 DOI: 10.1089/aid.2009.0013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Metabolic disturbances such as dyslipidemia, lipodystrophy syndrome, visceral obesity, hyperlactatemia, diabetes mellitus, and hepatic steatosis have been recognized as serious complications in long-term antiretroviral-treated HIV-infected patients. The oxidative capacity of liver mitochondria plays a central role in their pathogenesis and can be analyzed using the [(13)C]methionine breath test. We analyzed hepatic mitochondrial function using the [(13)C]methionine breath test in antiretrovirally treated and untreated HIV-infected patients as well as HIV-negative controls. Patients with hepatic steatosis, hypertriglyceridemia, lipohypertrophy, and older age showed reduced methionine metabolism. Hepatic mitochondrial function is impaired in antiretroviral-treated HIV-infected patients with disturbances of lipid metabolism.
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Scheipers U, Lorenz A, Pesavento A, Ermert H, Sommerfeld HJ, Garcia-Schürmann M, Senge T, Philippou S. ULTRASCHALL-GEWEBECHARAKTERISIERUNG FÜR DIE PROSTATADIAGNOSTIK. BIOMED ENG-BIOMED TE 2009. [DOI: 10.1515/bmte.2001.46.s1.72] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Hahn E, Riedlinger R, Bak M, Peschke P, Lorenz A, Zuna I, Gerlach L, Volm M, van Kaick G, Lorenz W. High Energy Pulsed Ultrasound (HEPUS): Cytotoxic effects on rodent tumors. BIOMED ENG-BIOMED TE 2009. [DOI: 10.1515/bmte.1988.33.s2.141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Lorenz A, Kitzerow HS, Schwuchow A, Kobelke J, Bartelt H. Photonic crystal fiber with a dual-frequency addressable liquid crystal: behavior in the visible wavelength range. OPTICS EXPRESS 2008; 16:19375-19381. [PMID: 19582031 DOI: 10.1364/oe.16.019375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Wave-guiding in the visible spectral range is investigated for a micro-structured crystal fiber filled with a dual-frequency addressable nematic liquid crystal mixture. The fiber exhibits a solid core surrounded by just 4 rings of cylindrical holes. Control of the liquid crystal alignment by anchoring agents permits relatively low attenuation. Samples with different anchoring conditions at the interface of the silica glass and the liquid crystal show different transmission properties and switching behavior. Polarization dependent and independent fiber optic switching is observed. Due to a dualfrequency addressing scheme, active switching to both states with enhanced and reduced transmission becomes possible for planar anchoring. Even a non-perfect fiber shows reasonable transmission and a variety of interesting effects.
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Kraeusslich J, Dubs C, Lorenz A, Tuennermann A. In-plane stress and strain components of epitaxially grown Zn:LiNbO 3thin films. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308081956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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Scholz M, Lorenz A, Pesavento A, Brendel B, Khaled W, Engelhardt M, Pechlivanis I, Noack V, Harders A, Schmieder K. Current status of intraoperative real-time vibrography in neurosurgery. ULTRASCHALL IN DER MEDIZIN (STUTTGART, GERMANY : 1980) 2007; 28:493-497. [PMID: 17918047 DOI: 10.1055/s-2006-927359] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
PURPOSE Intracranial lesions are often characterized by different elasticities. The aim of the present study was to test the application of vibrography during brain tumor surgery. MATERIALS AND METHODS The real-time vibrography system consisted of a conventional ultrasound system (Siemens Sonoline Omnia) with a custom-designed RF interface and a 6.5-MHz endocavity curved array (Siemens 6.5EC10). The RF data were digitized using a 50-MHz, 12-bit PCI analog/digital (A/D) converter for real-time or offline processing. Static compression was replaced by low-frequency axial vibration of the probe. A special applicator equipped with a stepping motor moved the ultrasonic probe and produced a low frequency mechanical vibration of 5-10 Hz with a vibration amplitude of 0.3 mm and slight preliminary compression (total<1 mm). The maximum application time was 60 sec. A pneumatic holding device (Unitrac, Aesculap, Tuttlingen, Germany) was used. RESULTS Brain tissue is normally color coded between red and orange. In this study 41 out of 45 tumors could be detected via vibrography. Two tumors could not be detected with this imaging technique: a glioblastoma at a depth of 2 cm and a metastasis at a depth of 3 cm. Two additional tumors were not recognized because of technical problems. In 4 cases tumors with strain values identical to those in brain tissue (coded red or orange) but easily identified by a peripheral zone of high strain (yellow) were found. Tumors with strain values higher than those measured in brain tissue coded yellow and were softer than brain during surgical intervention. Higher strain was found in 23 tumors. Tumors with strain values lower than those in cerebral tissue were found to be harder during surgery and coded brown or black. Lower strain was found in 10 cases. Four tumors were inhomogeneous and could not be assigned to one of the above groups. Mortality was 0%, morbidity 2.3%. One patient displayed transient paresis of the lower extremity due to microsurgical difficulties during the approach. In one patient minimal bleeding of the cortical surface occurred in a frontobasal tumor; however, no postoperative deficits were noted. CONCLUSION Vibrography is a new low-risk technique for intraoperative imaging. In low-grade astrocytomas and oligodendrogliomas, this additional technique can be used to control resection. In other cortical and subcortical tumors (e. g. metastases), it can provide an impression of the intratumoral elasticities.
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Herr F, Baal N, Reisinger K, Lorenz A, McKinnon T, Preissner KT, Zygmunt M. hCG in the Regulation of Placental Angiogenesis. Results of an In Vitro Study. Placenta 2007; 28 Suppl A:S85-93. [PMID: 17382384 DOI: 10.1016/j.placenta.2007.02.002] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2006] [Revised: 01/30/2007] [Accepted: 02/03/2007] [Indexed: 11/16/2022]
Abstract
Placental vascular development is essential for fetal growth and development. Inadequate placental vascular development is associated with early pregnancy losses and other pregnancy related pathologies. In addition to the ubiquitous, well-characterized angiogenic factors like vascular endothelial growth factor (VEGF) or basic fibroblast growth factor (bFGF), some pregnancy-specific factors (e.g. human chorionic gonadotropin (hCG), insulin-like growth factor-II (IGF-II) or alpha fetoprotein (AFP) were recently described to play a possible regulatory role in this process. In the present study we described an improved separation method for human placental microvascular endothelial cells (HPMVEC) and their functional characterization. Using the combination of enzymatic digestion and multistep immunomagnetic sorting with CD31 antibodies a model for villous vascularization was established. Isolated cells took up ac-dil-LDL, spontaneously formed capillary-like structures, and expressed common endothelial markers such as vascular endothelial growth factor receptor-2 (VEGFR-2), angiopoetin-1 and -2, Tie-2, CD144, thrombomodulin, and von Willebrand factor (vWF) as shown by RT-PCR, flow cytometry and Western blot analysis. The expression of the hCG/LH receptor in the placental vascular tree was verified both in vitro and in vivo. hCG stimulated proliferation of HPMVEC in a dose specific manner. While hCG alone had no significant effect on endothelial cell apoptosis, the combination of VEGF-A and hCG protected HPMVEC from staurosporine-induced apoptosis. hCG significantly stimulated sprout formation when compared to controls in a spheroid angiogenesis assay. Our results demonstrate a modified and reproducible method allowing studies of placental vascular development and provide new insights into the possible role of trophoblastic factors in this process.
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Lorenz A, Elsner C, Hambsch J. Postoperative Pflege von Patienten mit hypoplastischen Linksherzsyndrom (HLHS) nach Norwood Stage 1 Operation. Z Geburtshilfe Neonatol 2006. [DOI: 10.1055/s-2006-946089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Abstract
Homologous recombination is an important mechanism for the repair of double-strand breaks in DNA. One possible outcome of such repair is the reciprocal exchange or crossing over of DNA between chromosomes. Crossovers are beneficial during meiosis because, as well as generating genetic diversity, they promote proper chromosome segregation through the establishment of chiasmata. However, crossing over in vegetative cells can potentially result in loss of heterozygosity and chromosome rearrangements, which can be deleterious. Consequently, cells have evolved mechanisms to limit crossing over during vegetative growth while promoting it during meiosis. Here, we provide a brief review of how some of these mechanisms are thought to work.
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Lorenz A, Elsner C, Hambsch J. Postoperative Pflege von Patienten mit hypoplastischen Linksherzsyndrom (HLHS) nach Norwood Stage 1 Operation. Z Geburtshilfe Neonatol 2006. [DOI: 10.1055/s-2006-943174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Chappuis P, Portafaix C, Thomas E, Bertrand B, Walton R, Riccardo V, Baker R, Barlow I, Kaye A, Lorenz A, Durodier F. Design of a limiter for the JET EP ICRH antenna. FUSION ENGINEERING AND DESIGN 2005. [DOI: 10.1016/j.fusengdes.2005.06.257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Khaled W, Reichling S, Bruhns OT, Boese H, Baumann M, Monkman G, Egersdoerfer S, Klein D, Tunayar A, Freimuth H, Lorenz A, Pessavento A, Ermert H. Palpation imaging using a haptic system for virtual reality applications in medicine. Stud Health Technol Inform 2004; 98:147-53. [PMID: 15544261 DOI: 10.1142/9789812702678_0055] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In the field of medical diagnosis, there is a strong need to determine mechanical properties of biological tissue, which are of histological and pathological relevance. Malignant tumors are significantly stiffer than surrounding healthy tissue. One of the established diagnosis procedures is the palpation of body organs and tissue. Palpation is used to measure swelling, detect bone fracture, find and measure pulse, or to locate changes in the pathological state of tissue and organs. Current medical practice routinely uses sophisticated diagnostic tests through magnetic resonance imaging (MRI), computed tomography (CT) and ultrasound (US) imaging. However, they cannot provide direct measure of tissue elasticity. Last year we presented the concept of the first haptic sensor actuator system to visualize and reconstruct mechanical properties of tissue using ultrasonic elastography and a haptic display with electrorheological fluids. We developed a real time strain imaging system for tumor diagnosis. It allows biopsies simultaneously to conventional ultrasound B-Mode and strain imaging investigations. We deduce the relative mechanical properties by using finite element simulations and numerical solution models solving the inverse problem. Various modifications on the haptic sensor actuator system have been investigated. This haptic system has the potential of inducing real time substantial forces, using a compact lightweight mechanism which can be applied to numerous areas including intraoperative navigation, telemedicine, teaching and telecommunication.
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Görlitzer K, Lorenz A. [Medium sized rings from alprenolol and oxprenolol]. DIE PHARMAZIE 2004; 59:763-9. [PMID: 15544054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
The N-allyl derivatives 2 formed from the beta-blockers 1, were acetylated to give the esters 5. The 1,5-benzoxazacycloundecine 6a and the 1,10,5-benzodioxazacyclododecine 7a were isolated by ring closing metathesis (RCM) of 5a and 5b, respectively, using Grubbs catalyst in the presence of titanium tetraisopropanolate. Alkaline hydrolysis yielded the alcohols 6b and 7b.
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Görlitzer K, Lorenz A. [Bromometric assay of alprenolol and oxprenolol]. DIE PHARMAZIE 2004; 59:678-82. [PMID: 15497748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
Alprenolol (1a) reacts with an excess of bromine to yield the tribromo derivative 3a by addition and monosubstitution, while applying oxprenolol (1b) the disubstituted tetrabromo derivative 2b is obtained. The N-dealkylated substance 3c was isolated as a by-product. Heating the compounds 2b and 3a with potassium hydroxide in acetone gives the 2-bromoallyl derivatives 5. Using potassium tert-butanolate the 2-propyne 7 is formed from 3a. The different colours, obtained from 1a, 1b, pindolol and propranolol with perchloric acid in acetic acid or conc. sulfuric acid, are suitable for the identification test in the European Pharmacopoeia.
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G�rnert P, Aichele T, Lorenz A, Hergt R, Taubert J. Liquid phase epitaxy (LPE) grown Bi, Ga, Al substituted iron garnets with huge Faraday rotation for magneto-optic applications. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/pssa.200304410] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Lorenz A, Combs S, Reich M, Lang P, Watson M, Wilson D, Wittmann C. Mass transfer in long pellet guiding systems at ASDEX upgrade and JET. FUSION ENGINEERING AND DESIGN 2003. [DOI: 10.1016/s0920-3796(03)00226-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Chappuis P, Damiani C, Guerin C, Hurd F, Loarte A, Lomas P, Lorenz A, Paméla J, Peacock A, Portafaix C, Rapp J, Riccardo V, Rimini F, Saibene G, Salavy J, Sauce Y, Sartori R, Solano E, Thomas E, Thomas P, Tsitrone E, Valeta M. The design of a new JET divertor for high triangularity and high current scenarios. FUSION ENGINEERING AND DESIGN 2003. [DOI: 10.1016/s0920-3796(03)00171-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Polman C, Barkhof F, Kappos L, Pozzilli C, Sandbrink R, Dahlke F, Jakobs P, Lorenz A. Oral interferon beta-1a in relapsing-remitting multiple sclerosis: a double-blind randomized study. Mult Scler 2003; 9:342-8. [PMID: 12926838 DOI: 10.1191/1352458503ms923oa] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Interferon beta (IFNB) is available in parenteral formulations for treatment of multiple sclerosis (MS). The purpose of this study was to evaluate safety, tolerability and effects on MRI lesions of three different doses of oral IFNB-1a compared with placebo over six months in relapsing-remitting (RR) MS patients. METHODS In this multicenter; double-blind randomized trial, RR-MS patients received 0.06, 0.6 or 6 million international units (MIU) IFNB-1a or placebo every other day for up to six months. Gadolinium DTPA-enhanced brain MRI scans were performed at screening and monthly during treatment. The primary variable was the cumulative number of newly active lesions. Secondary variables included volume of enhancing lesions on T1-weighted images each month and lesion volume on T2-weighted images at months three and six. Safety measures included adverse events, laboratory variables, vital signs, ECG, physical examination, EDSS and number of relapses. Neopterin was measured in 21 patients and neutralizing antibodies in 24 patients. RESULTS Of 194 screened patients, 173 were randomized (42-44 patients per group) in 15 centers. Median cumulative numbers of newly active lesions over six months were 4.0 in the placebo and 0.6 MIU groups, compared with 7.5 and 9.0 in the 0.06 and 6 MIU groups (no significant differences). Secondary efficacy endpoints showed small and inconsistent differences between groups. Adverse events showed no notable group differences. Approximately two-thirds of patients in each group remained relapse free. No patients showed neutralizing antibodies. Neopterin levels were comparable between groups. CONCLUSION Oral IFNB-1a showed neither beneficial effects in RRMS nor any systemic biological effects. Treatment was safe and well tolerated.
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Sommerfeld HJ, Garcia-Schürmann JM, Schewe J, Kühne K, Cubick F, Berges RR, Lorenz A, Pesavento A, Scheipers U, Ermert H, Pannek J, Philippou S, Senge T, Scheipers S. [Prostate cancer diagnosis using ultrasound elastography. Introduction of a novel technique and first clinical results]. Urologe A 2003; 42:941-5. [PMID: 12898038 DOI: 10.1007/s00120-003-0297-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
During the last decade screening has improved prostate cancer detection. The main reason for this development is a better understanding of the margins of prostate-specific antigen (PSA) serum levels and the classification of PSA subtypes. In contrast, the introduction of transrectal ultrasound has not led to a measurable change in the prostate cancer detection rate. Our aim was to develop a novel ultrasound system for the acquisition of elastographic images of the prostate and evaluate the system regarding its clinical applicability. We used a technically modified conventional ultrasound system and analyzed the high-frequency ultrasonic data with a computer program. The first patient-based results suggest that elastography allows an accurate measurement of tumor size and localization in contrast to conventional transrectal ultrasound. Elastography visualizes different tissue elasticities to distinguish benign and cancerous tissue. Thus, we were able to even correctly classify prostate cancer lesions which are iso- or hyperechoic in B-mode sonography.
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Aichele T, Lorenz A, Hergt R, Görnert P. Garnet layers prepared by liquid phase epitaxy for microwave and magneto-optical applications – a review. CRYSTAL RESEARCH AND TECHNOLOGY 2003. [DOI: 10.1002/crat.200310071] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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75
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Lorenz A, Städtler N, Schulz HJ. Laser disintegration of cyanoacrylate clot with successful endoscopic removal of sclerotherapy needle from gastric varix. Endoscopy 2002; 34:670-2. [PMID: 12173092 DOI: 10.1055/s-2002-33231] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Intravariceal cyanoacrylate injection is a highly effective and safe procedure for the treatment of bleeding gastric varices. Nevertheless, some cases of severe cyanoacrylate-specific complications due to embolization have been described. Technical difficulties, including risk of sclerotherapy needle clogging, and cyanoacrylate sticking to the tip and the accessory channel of the endoscope, have been mentioned in other reports. We report a case in which a sclerotherapy needle that remained stuck in gastric valves after bucrylate injection was successfully removed by laser disintegration of the cyanoacrylate clot.
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