Name: diagnostic ultrasound imaging of mouse diaphragm function
Uploaded: 2014-04-21T16:00:00
Description: Watch this Scientific Journal Video about Diagnostic Ultrasound Imaging of Mouse Diaphragm Function at JoVE.com

Dette arbeidet er støttet med tilskudd av OU Generelt Fund G110 og forsknings Excellence Fund of Biomedical Research og OSU-HRS Fund 013000. Forfatterne ønsker å takke Lauren Chen for hennes hjelp i å forberede dette manuskriptet.

Alle prosedyrer som involverer dyr fag ble godkjent og gjennomført i samsvar og overholdelse av The Ohio State University Institutional Animal Care og bruk Committee (IACUC) forskrifter og retningslinjer. En. Mouse Anesthesia <ol><li> Sett opp en ren prosedyre bord med et oppvarmet isoterm pad innpakket i en kirurgisk håndkle. Den varmeputen skal opprettholdes mellom 30 ° C og 34 ° C for å stabilisere dyret kjernetemperatur og samtidig redusere potensiell stress til dyret. </li><li> P...

<ol>
	<li>Snyder, C. S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Complementarity+of+ultrasound+and+fluorescence+imaging+in+an+orthotopic+mouse+model+of+pancreatic+cancer.">Complementarity of ultrasound and fluorescence imaging in an orthotopic mouse model of pancreatic cancer.</a> BMC Cancer. 9, 106 (2009).</li><li>Franchi, F., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Non-invasive+assessment+of+cardiac+function+in+a+mouse+model+of+renovascular+hypertension.">Non-invasive assessment of cardiac function in a mouse model of renovascular hypertension.</a> Hypertension Research: Official Journal of the Japanese Society of Hypertension. , (2013).</li><li>Coatney, R. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Ultrasound+imaging:+principles+and+applications+in+rodent+research.">Ultrasound imaging: principles and applications in rodent research.</a> ILAR Journal / National Research Council, Institute of Laboratory Animal Resources. 42, 233-247 (2001).</li><li>Morenz, K., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Detection+of+air+trapping+in+chronic+obstructive+pulmonary+disease+by+low+frequency+ultrasound.">Detection of air trapping in chronic obstructive pulmonary disease by low frequency ultrasound.</a> BMC Pulmonary Medicine. 12, 8 (2012).</li><li>Gilliam, L. A., Moylan, J. S., Ann Callahan, L., Sumandea, M. P., Reid, M. B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Doxorubicin+causes+diaphragm+weakness+in+murine+models+of+cancer+chemotherapy.">Doxorubicin causes diaphragm weakness in murine models of cancer chemotherapy.</a> Muscle &amp; Nerve. 43, 94-102 (2011).</li><li>Ferreira, L. F., Campbell, K. S., Reid, M. B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Effectiveness+of+sulfur-containing+antioxidants+in+delaying+skeletal+muscle+fatigue.">Effectiveness of sulfur-containing antioxidants in delaying skeletal muscle fatigue.</a> Medicine and Science in Sports and Exercise. 43, 1025-1031 (2011).</li><li>Zuo, L., Clanton, T. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Reactive+oxygen+species+formation+in+the+transition+to+hypoxia+in+skeletal+muscle.">Reactive oxygen species formation in the transition to hypoxia in skeletal muscle.</a> American Journal of Physiology. Cell Physiology. 289, 207-216 (2005).</li><li>Helms, M. N., Torres-Gonzalez, E., Goodson, P., Rojas, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Direct+tracheal+instillation+of+solutes+into+mouse+lung.">Direct tracheal instillation of solutes into mouse lung.</a> J. Vis. Exp. , (2010).</li><li>Hedrick, W. R., Hykes, D. L., Starchman, D. E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> Ultrasound Physics and Instrumentation. , 445 (2005).</li><li>von Sarnowski, B., Khaw, A. V., Kessler, C., Schminke, U. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Evaluation+of+a+microconvex+array+transducer+for+the+ultrasonographic+examination+of+the+intrathoracic+segments+of+the+supraaortic+arteries.">Evaluation of a microconvex array transducer for the ultrasonographic examination of the intrathoracic segments of the supraaortic arteries.</a> Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging. 20, 246-250 (2010).</li><li>Stocksley, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> Abdominal Ultrasound. , 7-8 (2001).</li><li>Kremkau, F. W., Taylor, K. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Artifacts+in+ultrasound+imaging.">Artifacts in ultrasound imaging.</a> Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine. 5, 227-237 (1986).</li><li>Kremkau, F. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Diagnostic+Ultrasound:+Principles+and+Instruments.">Diagnostic Ultrasound: Principles and Instruments.</a> Saunders Elsevier. , 521 (2006).</li><li>Laing, F. C., Kurtz, A. B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+importance+of+ultrasonic+side-lobe+artifacts.">The importance of ultrasonic side-lobe artifacts.</a> Radiology. 145, 763-768 (1982).</li><li>Abu-Zidan, F. M., Hefny, A. F., Corr, P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Clinical+ultrasound+physics.">Clinical ultrasound physics.</a> Journal of Emergencies, Trauma, and Shock. 4, 501-503 (2011).</li><li>Gargani, L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Lung+ultrasound:+a+new+tool+for+the+cardiologist.">Lung ultrasound: a new tool for the cardiologist.</a> Cardiovascular Ultrasound. 9, 6 (2011).</li><li>Sanders, R. C., Winter, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> Clinical Sonography A Practical Guide. , 632 (2007).</li></ol>

Den aktuelle forsøksprotokoll utvikler diagnostiske ultralydavbildningsteknikker som er spesifikke for membranaktivitet i en musemodell via en ikke-invasiv, in vivo tilnærming. Anestesi apparater innstillingene er tilnærma verdier, noe som kan bli noe justert for hvert dyr, siden enkelte mus kan reagere forskjellig på anestesi. For å forhindre feilaktig anestesi administrasjon, er det viktig å jevnlig overvåke muse vitale tegn inkludert hjertefrekvens, pustefrekvens, og kroppstemperatur. Videre må håre...

Nylig har diagnostiske ultralyd imaging teknikker blitt brukt til musemodeller av renovaskulær hypertensjon og kreft i bukspyttkjertelen 1,2. Imidlertid er disse teknikker ikke har blitt mye brukt i gnager respiratorisk muskelfunksjon assay. Derfor har vi utviklet en diagnostisk ultralyd avbildningsmetode som et verdifullt verktøy for in vivo langsgående vurderinger av membran mobilitet i mus. Det er flere fordeler med å diagnostisk ultralydavbildning. For eksempel er det ikke-invasiv, safe, bærbar, og gir mulighet for sanntidsmålinger på en relativt lav kostnad tre. Spesielt er visse lavfrekvente ultralydapparater ble stand til å oppdage luft fangst, en klinisk karakteristisk for kronisk obstruktiv lungesykdom (COPD) med mild til alvorlig luftveisobstruksjon 4.. Dermed kan diagnostisk ultralydavbildning tjene som en lett tilgjengelig og reproduserbar screeningmetode for sanntids overvåking<html> av respirasjonsproblemer. Diagnostiske ultralyd imaging teknikker er ofte brukt til større dyr eller mennesker. Men det har vært et begrenset antall ultralyd imaging studier på musemodeller, noe som er sannsynlig på grunn av utfordringene i å utføre ultralyd på småskala fag. Den aktuelle protokoll beskriver en ny fremgangsmåte for måling av membranfunksjonen hos mus. I tillegg, selv om det har vært flere gnagere på membran-funksjon, de fleste av de resultater ble generert ved å isolere muskelstrimler direkte fra avlives dyret 5-7. I motsetning til dette vil ved bruk av en in vivo diagnostisk ultralydavbildning metode for analyse av membranaktivitet redusere antall dyrene avlivet for eksperimentering. Videre kan langsiktige behandlinger fokusert på å styrke membran kontraktilitet være nøyaktig vurderes via ultralyd i gnager modeller uten å ofre dyr. ntent &quot;&gt; I vårt laboratorium, har vi utviklet en effektiv metode for å visualisere samt analysere mus membran aktivitet ved hjelp av en ultralyd-maskin, noe som bidrar til forståelsen av membran funksjon in vivo, unngår invasive metoder til dyr, og hjelpemidler i utviklingen av terapeutisk behandlinger for luft dysfunksjon.

<table border="0" cellpadding="0" cellspacing="0" width="602">
	<colgroup>
		<col />
		<col />
		<col />
		<col />
	</colgroup>
	<tbody>
		<tr height="127">
			<td height="127" style="height:127px;width:147px;">Veterinary digital ultrasonic diagnostic imaging system</td>
			<td style="width:111px;">Edan</td>
			<td style="width:151px;">DUS 3 VET</td>
			<td style="width:196px;">Ultrasound parameters include: frequency of 6.5 MHz, Depth of 29 mm. Note: An equivalent ultrasound machine may be used for this protocol</td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;width:147px;">Micro-convex array transducer</td>
			<td>Edan</td>
			<td>C611</td>
			<td>Or equivalent</td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;width:147px;">GE Logiq i hand-carried unit (HCU)&#160;</td>
			<td>GE Healthcare</td>
			<td style="width:151px;">GE Logiq i hand-carried unit (HCU)&#160;</td>
			<td>Or equivalent</td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;width:147px;">GE 12 MHz linear array probe</td>
			<td>GE Healthcare</td>
			<td style="width:151px;">12L-RS</td>
			<td>Or equivalent</td>
		</tr>
		<tr height="171">
			<td height="171" style="height:171px;width:147px;">Veterinary anesthetic vaporizer</td>
			<td style="width:111px;">Webster Veterinary</td>
			<td>Serial #: W422021</td>
			<td style="width:196px;">Isoflurane was exclusively used with this vaporizer (or equivalent). A custom made induction chamber for anesthesia was assembled for initial anesthesia. Maintenance anesthesia was performed using a nose cone</td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;width:147px;">Isothesia (Isoflurane, USP)</td>
			<td>Butler Schein</td>
			<td>29405 250ML PVL</td>
			<td>Or equivalent</td>
		</tr>
		<tr height="57">
			<td height="57" style="height:57px;width:147px;">Enviro-pure anesthesia absorbing canister</td>
			<td style="width:111px;">Surgivet Smiths Medical PM, Inc.</td>
			<td>Part #: 32373B10</td>
			<td>Or equivalent</td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;width:147px;">Ultrasound transmission gel</td>
			<td>HM Sonic</td>
			<td>N/A</td>
			<td>Or equivalent&#160;</td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;width:147px;">Puralube vet ointment</td>
			<td>Puralube&#160;</td>
			<td>NDC 17033-211-38</td>
			<td>Or equivalent</td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;width:147px;">Deltaphase isothermal pad</td>
			<td style="width:111px;">Braintree Scientific Inc.</td>
			<td>39DP</td>
			<td>Or equivalent</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Hair remover</td>
			<td>Nair</td>
			<td>N/A</td>
			<td>Or equivalent</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Electric razor</td>
			<td>Remington</td>
			<td>HC-5015</td>
			<td>Or equivalent</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Surgical tape</td>
			<td>3M Micropore</td>
			<td>1530-1</td>
			<td>Or equivalent</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Gauze sponges</td>
			<td>Dynarex</td>
			<td>3262</td>
			<td>Or equivalent</td>
		</tr>
	</tbody>
</table>

diagnostic ultrasound imaging of mouse diaphragm function

Funksjonsanalyse av gnager respiratoriske skjelettmuskulatur, særlig mellomgulvet, som vanligvis utføres ved å isolere muskelstrimler ved hjelp av invasive kirurgiske prosedyrer. Selv om dette er en effektiv metode for å vurdere in vitro membranaktivitet, omfatter det ikke-overlevelse kirurgi. Anvendelsen av ikke-invasiv ultralydavbildning som en in vivo fremgangsmåte er fordelaktig siden det ikke bare reduserer antallet av dyr avlivet, men er også egnet for å overvåke sykdomsprogresjon hos levende mus. Dermed kan vår ultralyd avbildningsmetode sannsynlig bistå i utviklingen av nye behandlingsformer som lindre muskel skader forårsaket av ulike luftveissykdommer. Spesielt, i kliniske diagnoser av obstruktive lungesykdommer, har ultralydavbildning potensiale til å bli brukt i forbindelse med andre standardtester for å påvise tidlig innsettende diafragma muskeltretthet. I dagens protokollen beskriver vi hvordan du vurdere nøyaktig membran contractiheten i en musemodell ved hjelp av en diagnostisk ultralyd avbildningsteknikk.

En typisk ultralyd-bilde av en musemembran er vist i Figur 1A. Musen membran maksimal vertikal forskyvning ble spilt inn. Denne avstanden ble beregnet ved nettopp å måle dybden av diafragmabevegelse fra avslapning til sammentrekning ved hjelp av de elektroniske målepunktene som er en del av ultralyd programvare. Tabell 1 viser disse avstandsmålinger av mellomgulvs sammentrekninger fra tre forskjellige mus. Etter konvertering cine sløyfe-fil til en MPEG-fil, ble respirasjonsfrekvens...

Watch this Scientific Journal Video about Diagnostic Ultrasound Imaging of Mouse Diaphragm Function at JoVE.com

Diagnostic Ultrasound Imaging of Mouse Diaphragm Function

Diagnostiske ultralydundersøkelser har vist seg å være effektive i å diagnostisere ulike luftveissykdommer hos mennesker og dyr. Vi viser en omfattende ultralyd protokollen benyttes av Dr. Zuo laboratorium for å analysere membrankinetikk spesielt i musemodeller. Dette er også en ikke-invasiv teknikk for forskning som kan gi kvantitativ informasjon om mus respiratorisk muskelfunksjon.

Diagnostic Ultrasound Imaging of Mouse Membran Funksjon

Function analysis of rodent respiratory skeletal muscles, particularly the diaphragm, is commonly performed by isolating muscle strips using invasive ...

diagnostic-ultrasound-imaging-of-mouse-diaphragm-function

Research

JoVE Journal

Medicine

Murine Echocardiography and Ultrasound Imaging

Rodent models of cardiac pathophysiology represent a valuable research tool to investigate mechanism of disease as well as test new therapeutics.1 Echocardiography provides a powerful, non-invasive tool to serially assess cardiac morphometry and function in a living animal.2 However, using this technique on mice poses unique challenges owing to the small size and rapid heart rate of these animals.3 Until recently, few ultrasound systems were capable of performing quality echocardiography on mice, and those generally lacked the image resolution and frame rate necessary to obtain truly quantitative measurements. Newly released systems such as the VisualSonics Vevo2100 provide new tools for researchers to carefully and non-invasively investigate cardiac function in mice. This system generates high resolution images and provides analysis capabilities similar to those used with human patients. Although color Doppler has been available for over 30 years in humans, this valuable technology has only recently been possible in rodent ultrasound.4,5 Color Doppler has broad applications for echocardiography, including the ability to quickly assess flow directionality in vessels and through valves, and to rapidly identify valve regurgitation. Strain analysis is a critical advance that is utilized to quantitatively measure regional myocardial function.6 This technique has the potential to detect changes in pathology, or resolution of pathology, earlier than conventional techniques. Coupled with the addition of three-dimensional image reconstruction, volumetric assessment of whole-organs is possible, including visualization and assessment of cardiac and vascular structures. Murine-compatible contrast imaging can also allow for volumetric measurements and tissue perfusion assessment.

This video demonstrates use of a rail-mounted high-frequency ultrasound probe to perform echocardiography on an anesthetized mouse. The methods describe both conventional two-dimensional and M-mode measurements of cardiac function in addition to newer, more powerful tools such as color Doppler, strain analysis, as well as general and targeted contrast imaging.

Rodent models of cardiac pathophysiology represent a valuable research tool to investigate mechanism of disease as well as test new therapeutics.1  ...

A Novel Application of Musculoskeletal Ultrasound Imaging

Ultrasound is an attractive modality for imaging muscle and tendon motion during dynamic tasks and can provide a complementary methodological approach for biomechanical studies in a clinical or laboratory setting. Towards this goal, methods for quantification of muscle kinematics from ultrasound imagery are being developed based on image processing. The temporal resolution of these methods is typically not sufficient for highly dynamic tasks, such as drop-landing. We propose a new approach that utilizes a Doppler method for quantifying muscle kinematics. We have developed a novel vector tissue Doppler imaging (vTDI) technique that can be used to measure musculoskeletal contraction velocity, strain and strain rate with sub-millisecond temporal resolution during dynamic activities using ultrasound. The goal of this preliminary study was to investigate the repeatability and potential applicability of the vTDI technique in measuring musculoskeletal velocities during a drop-landing task, in healthy subjects. The vTDI measurements can be performed concurrently with other biomechanical techniques, such as 3D motion capture for joint kinematics and kinetics, electromyography for timing of muscle activation and force plates for ground reaction force. Integration of these complementary techniques could lead to a better understanding of dynamic muscle function and dysfunction underlying the pathogenesis and pathophysiology of musculoskeletal disorders.

We describe a new ultrasound-based vector tissue Doppler imaging technique to measure muscle contraction velocity, strain and strain rate with sub-millisecond temporal resolution during dynamic activities. This approach provides complementary measurements of dynamic muscle function and could lead to a better understanding of mechanisms underlying musculoskeletal disorders.

A Novel Anvendelse av Muskel ultralyd Imaging

Ultrasound is an attractive modality for imaging muscle and tendon  motion during dynamic tasks and can provide a complementary methodological  approach ...

State of the Art Cranial Ultrasound Imaging in Neonates

Cranial ultrasound (CUS) is a reputable tool for brain imaging in critically ill neonates. It is safe, relatively cheap and easy to use, even when a patient is unstable. In addition it is radiation-free and allows serial imaging. CUS possibilities have steadily expanded. However, in many neonatal intensive care units, these possibilities are not optimally used. We present a comprehensive approach for neonatal CUS, focusing on optimal settings, different probes, multiple acoustic windows and Doppler techniques. This approach is suited for both routine clinical practice and research purposes. In a live demonstration, we show how this technique is performed in the neonatal intensive care unit. Using optimal settings and probes allows for better imaging quality and improves the diagnostic value of CUS in experienced hands. Traditionally, images are obtained through the anterior fontanel. Use of supplemental acoustic windows (lambdoid, mastoid, and lateral fontanels) improves detection of brain injury. Adding Doppler studies allows screening of patency of large intracranial arteries and veins. Flow velocities and indices can be obtained. Doppler CUS offers the possibility of detecting cerebral sinovenous thrombosis at an early stage, creating a window for therapeutic intervention prior to thrombosis-induced tissue damage. Equipment, data storage and safety aspects are also addressed.

Cranial ultrasound (CUS) is a valuable tool for brain imaging in critically ill neonates. This video shows a comprehensive approach for neonatal (Doppler) CUS for both clinical and research purposes, including a bedside demonstration of the technique.

State of the Art Cranial ultralydsavbilding i Nyfødte

Cranial ultrasound (CUS) is a reputable tool for brain imaging in critically ill neonates. It is safe, relatively cheap and easy to use, even when a ...

High-frequency Ultrasound Imaging of Mouse Cervical Lymph Nodes

High-frequency ultrasound (HFUS) is widely employed as a non-invasive method for imaging internal anatomic structures in experimental small animal systems. HFUS has the ability to detect structures as small as 30 &#181;m, a property that has been utilized for visualizing superficial lymph nodes in rodents in brightness (B)-mode. Combining power Doppler with B-mode imaging allows for measuring circulatory blood flow within lymph nodes and other organs. While HFUS has been utilized for lymph node imaging in a number of mouse&#160; model systems, a detailed protocol describing HFUS imaging and characterization of the cervical lymph nodes in mice has not been reported. Here, we show that HFUS can be adapted to detect and characterize cervical lymph nodes in mice. Combined B-mode and power Doppler imaging can be used to detect increases in blood flow in immunologically-enlarged cervical nodes. We also describe the use of B-mode imaging to conduct fine needle biopsies of cervical lymph nodes to retrieve lymph tissue for histological&#160; analysis. Finally, software-aided steps are described to calculate changes in lymph node volume and to visualize changes in lymph node morphology following image reconstruction. The ability to visually monitor changes in cervical lymph node biology over time provides a simple and powerful technique for the non-invasive monitoring of cervical lymph node alterations in preclinical mouse models of oral cavity disease.

This protocol describes the application of high-frequency ultrasound (HFUS) for imaging mouse cervical lymph nodes. This technique optimizes visualization and quantification of cervical lymph node morphology, volume and blood flow. Image-guided biopsy of cervical lymph nodes and processing of lymph tissue for histological evaluation is also demonstrated.

Høyfrekvente ultralydavbildning av Muse Cervical lymfeknuter

High-frequency ultrasound (HFUS) is widely employed as a non-invasive method for imaging internal anatomic structures in experimental small animal ...

Quantification of Levator Ani Hiatus Enlargement by Magnetic Resonance Imaging in Males and Females with Pelvic Organ Prolapse

Here we present a protocol to examine the levator ani hiatus in males and females with pelvic organ prolapse, during the Valsalva maneuver and while evacuating acoustic gel, using a horizontally oriented 1.5 T magnetic resonance (MR) scanner. On midsagittal images, the vertical distance of pelvic organs is measured in millimeters relative to the hymen plane (female) and to the lower border of the symphysis pubis (male), preceded by - (above) or + ( below) signs. On axial images, the levator ani area is calculated in square centimeters with a free-hand tracing method from three key images, passing through the midsymphysis (level I), tangential to the lower border of the symphysis (level II), and at the maximal anterior rectal wall bulging (level III). Areas at rest and strained are compared to find evidence of a percentage of increase. The purpose is to provide objective evidence of the maximal extent of pelvic organs descent and hiatus enlargement without the interference of foreign objects or the examiner&#39;s proximity, so as to overcome the limitations of pelvic examination and transperineal sonography (i.e., subjectivity and sex-related limitations [female only]).

Here we present a protocol to standardize the measurement of the levator ani hiatus size&#160;by magnetic resonance imaging. The purpose is to extract biomechanical inferences from image analysis by comparing resting and straining values in patients of both sexes with pelvic prolapse, using consistent anatomical bony landmarks.

Kvantifisering av Levator Ani pause utvidelse av magnetisk resonans Imaging hos menn og kvinner med bekken Organ prolaps

Here we present a protocol to examine the levator ani hiatus in males and females with pelvic organ prolapse, during the Valsalva maneuver and while ...

Cardiac Magnetic Resonance for the Evaluation of Suspected Cardiac Thrombus: Conventional and Emerging Techniques

We present the conventional cardiac magnetic resonance (CMR) protocol for evaluating a suspected thrombus and highlight emerging techniques.&#160;The appearance of a mass on certain magnetic resonance (MR) sequences can help differentiate a thrombus from competing diagnoses such as a tumor. T1 and T2 signal characteristics of a thrombus are related to the evolution of hemoglobin properties. A thrombus typically does not enhance following contrast administration, which also helps differentiation from a tumor. We also highlight the emerging role of T1 mapping in the evaluation of a thrombus, which can add another level of support in diagnosis. Prior to any CMR exam, patient screening and interviews are critical to ensure safety and to optimize patient comfort. Effective communication during the exam between the technologist and the patient promotes proper breath holding technique and higher quality images. Volumetric post processing and structured reporting are helpful to ensure that the radiologist answers the ordering services&#39; question and communicates these results effectively. Optimal pre-MR safety evaluation, CMR exam execution, and post exam processing and reporting allow for delivery of high quality radiological service in the evaluation of a suspected cardiac thrombus.

The goal of this article is to describe how cardiac magnetic resonance can be used for the evaluation and diagnosis of a suspected cardiac thrombus. The method presented will describe data acquisition as well as the pre-procedure and post-procedure protocol.

CARDIAC magnetisk resonans for evaluering av mistenkte CARDIAC Trombe: konvensjonelle og Emerging teknikker

We present the conventional cardiac magnetic resonance (CMR) protocol for evaluating a suspected thrombus and highlight emerging techniques.&#160;The ...

Near Infrared Photoimmunotherapy for Mouse Models of Pleural Dissemination

The efficacy of photoimmunotherapy can be evaluated more accurately with an orthotopic mouse model than with a subcutaneous one. A pleural dissemination model can be used for the evaluation of treatment methods for intrathoracic diseases such as lung cancer or malignant pleural mesothelioma.
Near-infrared photoimmunotherapy (NIR-PIT) is a recently developed cancer treatment strategy that combines the specificity of tumor-targeting antibodies with toxicity caused by a photoabsorber (IR700Dye) after exposure to NIR light. The efficacy of NIR-PIT has been reported using various antibodies; however, only a few reports have shown the therapeutic effect of this strategy in an orthotopic model. In the present study, we demonstrate an example of efficacy evaluation of the pleural disseminated lung cancer model, which was treated using NIR-PIT.

Near-infrared photoimmunotherapy (NIR-PIT) is an emerging cancer therapeutic strategy that utilizes an antibody-photoabsorber (IR700Dye) conjugate and NIR light to destroy cancer cells. Here, we present a method to evaluate the antitumor effect of NIR-PIT in a mouse model of pleural disseminated lung cancer and malignant pleural mesothelioma using bioluminescence imaging.

Nær infrarød fotoimmunoterapi for musemodeller av pleural formidling

The efficacy of photoimmunotherapy can be evaluated more accurately with an orthotopic mouse model than with a subcutaneous one. A pleural dissemination ...

Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function

Approximately 40% of patients undergoing invasive coronary angiography for investigation of angina are found to have no obstructive coronary artery disease (ANOCA). Abnormal coronary function underlies coronary vasomotion syndromes including coronary endothelial dysfunction, microvascular angina, vasospastic angina, post-PCI angina and myocardial infarction with no obstructive coronary arteries (MINOCA). Each of these endotypes are distinct subgroups, characterized by specific disease mechanisms. Diagnostic criteria and linked therapy for these conditions are now established by expert consensus and clinical guidelines.
Coronary function tests are performed as an adjunctive interventional diagnostic procedure (IDP) in appropriately selected patients during coronary angiography. This aids differentiation of patients according to endotype. The IDP includes two distinct components: a diagnostic guidewire test and a pharmacological coronary reactivity test. The tests last approximately 5 minutes for the former and 10-15 minutes for the latter. Patient safety and staff education are key.
The diagnostic guidewire test measures parameters of coronary flow limitation (fractional flow reserve [FFR], coronary flow reserve [CFR], microvascular resistance [index of microvascular resistance (IMR)], basal resistance index, and vasodilator function [CFR, resistive reserve ratio (RRR)]).
The pharmacological coronary reactivity test measures the vasodilator potential and propensity to vasospasm of both the main coronary arteries and the micro-vessels. It involves intra-coronary infusion of acetylcholine and glyceryl trinitrate (GTN). Acetylcholine is not licensed for parenteral use and is therefore prescribed on a named-patient basis. Vasodilatation is the normal, expected response to infusion of physiological concentrations of acetylcholine. Vascular spasm represents an abnormal response, which supports the diagnosis of vasospastic angina.
The purpose of this practical guide is to provide information on the preparation and administration of the IDP in clinical practice. It discusses some key preparation and safety considerations, as well as tips for procedural success. The IDP supports stratified medicine for a personalized approach to health and wellbeing.

The purpose of this practical guide is to provide information on the preparation and administration of an interventional diagnostic procedure in clinical practice. It discusses some key preparation and safety considerations, as well as tips for procedural success.

Intervensjonell diagnostisk prosedyre: En praktisk veiledning for vurdering av koronar vaskulær funksjon

Approximately 40% of patients undergoing invasive coronary angiography for investigation of angina are found to have no obstructive coronary artery ...

Drug Treatment by Central Venous Catheter in a Mouse Model of Angiotensin II Induced Abdominal Aortic Aneurysm and Monitoring by 3D Ultrasound

Since pharmaceutical treatment options are lacking in the clinical management of abdominal aortic aneurysm (AAA), animal models, in particular mouse models, are applied to advance the understanding of the disease pathogenesis and to identify potential therapeutic targets. Testing novel drug candidates to block AAA growth in these models generally requires repeated drug administration during the time course of the experiment. Here, we describe a compiled protocol for AAA induction, insertion of an intravenous catheter to facilitate prolonged therapy, and serial AAA monitoring by 3D ultrasound. Aneurysms are induced in apolipoprotein E (ApoE) deficient mice by angiotensin II release over 28 days from osmotic mini-pumps implanted subcutaneously into the mouse back. Subsequently, the surgical procedure for external jugular vein catheterization is conducted to allow for daily intravenous drug treatment or repeated blood sampling via a subcutaneous vascular access button. Despite the two dorsal implants, the monitoring of AAA development is readily facilitated by sequential semi-automated 3D ultrasound analysis, which yields comprehensive information on the expansion of aortic diameter and volume and on aneurysm morphology, as illustrated by experimental examples.

This protocol describes the consecutive implantation of an osmotic pump to induce abdominal aortic aneurysm by angiotensin II release in apolipoprotein E (ApoE) deficient mice and of a vascular access port with a jugular vein catheter for repeated drug treatment. Monitoring of aneurysm development by 3D ultrasound is effectively conducted despite dorsal implants.

Medikamentell behandling med sentralt venekateter i musemodell av angiotensin II-indusert abdominal aortaaneurisme og overvåking ved 3D-ultralyd

Since pharmaceutical treatment options are lacking in the clinical management of abdominal aortic aneurysm (AAA), animal models, in particular mouse ...

Muscle Function Obtained with Motion Mode Ultrasound and Surface Electromyography during Core Endurance Exercise

Motion mode (M-mode) ultrasound allows researchers and clinicians to measure the change of muscle thickness across time. Muscle thickness can be measured between fascial borders at a given time point during an exercise. This selected time point produces a one-dimensional image resulting in real-time, live observation of anatomy. Ultrasound used during functional movement can be referred to as dynamic ultrasound; this is feasible and reliable with the use of a linear transducer, elastic belt, and foam block to secure consistent transducer placement. The lateral abdominal wall is commonly investigated using ultrasound due to the overlapping nature of the muscles. Surface electromyography (sEMG) can complement M-mode ultrasound imaging because it measures the electrical representation of muscle activation. There is minimal evidence using M-mode ultrasound and sEMG simultaneously during core exercise. Exercises that challenge the core musculature involve both isometric holds (e.g., side plank), as well as oscillatory extremity movements (e.g., dead bug). In this study, both instruments will be used simultaneously to measure core muscle function during exercise. Ultrasound measurements will be obtained using a linear transducer and ultrasound unit, and sEMG measurements will be acquired from a wireless sEMG system. To make comparisons between participants and exercises, normalization methods using static, exercise starting positions for both instruments will be used. An activation ratio will be used for ultrasound and calculated by dividing the contracted thickness (thickness during a time point of exercise) by the rested (starting position) thickness. Muscle thickness will be measured in centimeters from the superior inferior fascial border to inferior superior fascial border. These methods aim to offer an innovative and practical measurement of muscle function with M-mode ultrasound and sEMG during core endurance exercises.

This protocol uses motion mode ultrasound and surface electromyography simultaneously to measure muscle function of the core. Muscle thickness and activation of the local stabilizers (e.g., transverse abdominis, internal oblique) and global movers (e.g., external oblique) is achievable during specific time points of the side plank and dead bug exercises.

Muskelfunksjon oppnådd med bevegelsesmodus ultralyd og overflateelektromyografi under Core Endurance Exercise

Motion mode (M-mode) ultrasound allows researchers and clinicians to measure the change of muscle thickness across time. Muscle thickness can be measured ...