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Blood Pressure: Pressure of the Blood on the Arteries and other Blood vessels.
 Science Education: Essentials of Physical Examinations I

Blood Pressure Measurement

JoVE Science Education

Source: Meghan Fashjian, ACNP-BC, Beth Israel Deaconess Medical Center, Boston MA

The term blood pressure (BP) describes lateral pressures produced by blood upon the vessel walls. BP is a vital sign obtained routinely in hospital and outpatient settings, and is one of the most common medical assessments performed around the world. It can be determined directly with the intra-arterial catheter or by indirect method, which is a non-invasive, safe, easily reproducible, and thus most used technique. One of the most important applications of BP measurements is the screening, diagnosis, and monitoring of hypertension, a condition that affects almost one third of the U.S. adult population and is one of the leading causes of the cardiovascular disease. BP can be measured automatically by oscillometry or manually by auscultation utilizing a sphygmomanometer, a device with an inflatable cuff to collapse the artery and a manometer to measure the pressure. Determination of the pulse-obliterating pressure by palpation is done prior to auscultation to give a rough estimate of the target systolic pressure. Next, the examiner places a stethoscope over the brachial artery of the patient, inflates the cuff above the expected systolic pressure, and then auscultates while deflating the cuff and o

 JoVE Medicine

Measuring Ascending Aortic Stiffness In Vivo in Mice Using Ultrasound

1Department of Biomedical Engineering, Johns Hopkins University, 2Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University, 3Department of Medicine (Cardiology), Johns Hopkins University, 4The Australian School of Advanced Medicine, Macquarie University


JoVE 52200

 Science Education: Essentials of Lab Animal Research

Blood Withdrawal I

JoVE Science Education

Source: Kay Stewart, RVT, RLATG, CMAR; Valerie A. Schroeder, RVT, RLATG. University of Notre Dame, IN

Blood collection is a common requirement for research studies that involve mice and rats. The method of blood withdrawal in mice and rats is dependent upon the volume of blood needed, the frequency of the sampling, the health status of the animal to be bled, and the skill level of the technician.1 All methods discussed-retro-orbital sinus bleeds, initial tail snip bleeds, and intracardiac bleeds-require the use of a general anesthesia.

 Science Education: Essentials of Lab Animal Research

Blood Withdrawal II

JoVE Science Education

Source: Kay Stewart, RVT, RLATG, CMAR; Valerie A. Schroeder, RVT, RLATG. University of Notre Dame, IN

The collection of blood from mice and rats for analysis can be done through a variety of methods. Each method of collection has variations in the type of restraint required, the invasiveness of the procedure, and the necessity of a general anesthetic.1Historically, the use of the retro-orbital sinus cavity has been used, but not without debate. The controversy related to the potential tissue damage,or even blindness,caused by retro-orbital bleeds has led to the development of facial and submandibular vein bleeding methods in mice.Blood collection from the saphenous vein in both mice and rats is another technique that has been developed. These procedures do not require anesthesia and therefore are suitable when the use of anesthetics may confound blood results or other data.

 JoVE Medicine

Development of an Algorithm to Perform a Comprehensive Study of Autonomic Dysreflexia in Animals with High Spinal Cord Injury Using a Telemetry Device

1International Collaboration on Repair Discoveries (ICORD), Faculty of Medicine, University of British Columbia, 2Department of Medicine, Division of Physical Medicine and Rehabilitation, University of British Columbia, GF Strong Rehabilitation Centre


JoVE 52809

 JoVE Immunology and Infection

Right Ventricular Systolic Pressure Measurements in Combination with Harvest of Lung and Immune Tissue Samples in Mice

1Department of Environmental Medicine, New York University School of Medicine, Tuxedo, 2Division of Allergy, Pulmonary, & Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, 3Division of Pulmonary Medicine, New York University School of Medicine


JoVE 50023

 JoVE Medicine

Ultrasound Assessment of Flow-Mediated Dilation of the Brachial and Superficial Femoral Arteries in Rats

1Department of Internal Medicine, University of Utah, 2Department of Kinesiology and Health Education, University of Texas at Austin, 3Division of Nephrology and Hypertension, University of Utah, 4Department of Biochemistry, University of Utah, 5Department of Exercise and Sport Science, University of Utah, 6Geriatric Research Education and Clinical Center, Department of Veterans Affairs


JoVE 54762

 JoVE Medicine

The Rabbit Blood-shunt Model for the Study of Acute and Late Sequelae of Subarachnoid Hemorrhage: Technical Aspects

1Department of Intensive Care Medicine, University and Bern University Hospital (Inselspital), 2Department of Neurosurgery, Kantonsspital Aarau, 3Laboratories for Neuroscience Research in Neurosurgery, Boston Children's Hospital, 4Harvard Medical School, Boston Children's Hospital, 5Department of Neurosurgery, University and Bern University Hospital (Inselspital), 6Department of Neurosurgery, University Hospital Cologne, 7Institute of Pathology, Länggasse Bern


JoVE 52132

 JoVE Medicine

Primary Outcome Assessment in a Pig Model of Acute Myocardial Infarction

1Department of Experimental Cardiology, University Medical Center Utrecht, 2Department of Cardiology, University Medical Center Utrecht, 3Department of Clinical Chemistry and Hematology, University Medical Center Utrecht, 4Interuniversity Cardiology Institutes of the Netherlands (ICIN)


JoVE 54021

 JoVE Medicine

Chronic Thromboembolic Pulmonary Hypertension and Assessment of Right Ventricular Function in the Piglet

1Surgical Research Lab, Marie Lannelongue Hospital, 2Department of Pathology, Marie Lannelongue Hospital, 3Department of Thoracic and Vascular Surgery, Marie Lannelongue Hospital, 4Thoracic and Cardiovascular Surgery, University Hospital of Rennes, 5INSERM U999 Paris-Sud University


JoVE 53133

 JoVE Medicine

Evaluation of a Novel Laser-assisted Coronary Anastomotic Connector - the Trinity Clip - in a Porcine Off-pump Bypass Model

1Department of Cardiothoracic Surgery, University Medical Center Utrecht, 2Vascular Connect b.v., 3Department of Neurosurgery, University Medical Center Utrecht, 4Department of Experimental Cardiology, University Medical Center Utrecht


JoVE 52127

 JoVE Medicine

Percutaneous Hepatic Perfusion (PHP) with Melphalan as a Treatment for Unresectable Metastases Confined to the Liver

1Department of Surgery, Leiden University Medical Centre, 2Department of Radiology, Leiden University Medical Centre, 3Department of Anesthesiology, Leiden University Medical Centre, 4Department of Extracorporeal Circulation, Leiden University Medical Centre, 5Department of Medical Oncology, Leiden University Medical Centre, 6Department of Surgery, Erasmus MC Cancer Institute


JoVE 53795

 Science Education: Essentials of Physical Examinations I

Peripheral Vascular Exam Using a Continuous Wave Doppler

JoVE Science Education

Source: Joseph Donroe, MD, Internal Medicine and Pediatrics, Yale School of Medicine, New Haven, CT

Peripheral vascular disease (PVD) is a common condition affecting older adults and includes disease of the peripheral arteries and veins. While the history and physical exam offer clues to its diagnosis, Doppler ultrasound has become a routine part of the bedside vascular examination. The video titled "The Peripheral Vascular Exam" gave a detailed review of the physical examination of the peripheral arterial and venous systems. This video specifically reviews the bedside assessment of peripheral arterial disease (PAD) and chronic venous insufficiency using a handheld continuous wave Doppler. The handheld Doppler (HHD) is a simple instrument that utilizes continuous transmission and reception of ultrasound (also referred to as continuous wave Doppler) to detect changes in blood velocity as it courses through a vessel. The Doppler probe contains a transmitting element that emits ultrasound and a receiving element that detects ultrasound waves (Figure 1). The emitted ultrasound is reflected off of moving blood and back to the probe at a frequency directly related to the velocity of blood flow. The reflected signal is detected and transduced to an audible sound with a frequen

 JoVE Medicine

Method of Isolated Ex Vivo Lung Perfusion in a Rat Model: Lessons Learned from Developing a Rat EVLP Program

1Department of Biomedical Engineering, Ohio State University Wexner Medical Center, 2Davis Heart & Lung Research Institute, Ohio State University Wexner Medical Center, 3The Collaboration for Organ Perfusion, Protection, Engineering and Regeneration (COPPER) Laboratory, Ohio State University Wexner Medical Center, 4Division of Cardiac Surgery, Department of Surgery, Ohio State University Wexner Medical Center, 5Departments of Pediatrics and Internal Medicine, Ohio State University, 6Advanced Lung Disease Program, Lung and Heart-Lung Transplant Programs, Nationwide Children's Hospital, 7Division of Transplantation, Department of Surgery, Ohio State University Wexner Medical Center


JoVE 52309

 JoVE Medicine

Ex Situ Normothermic Machine Perfusion of Donor Livers

1Section of Hepato-Pancreato-Biliary Surgery and Liver Transplantation, University of Groningen, University Medical Center Groningen, 2Surgical Research Laboratory, Department of Surgery, University of Groningen, University Medical Center Groningen, 3Center of Engineering in Medicine/Surgical Services, Massachusetts General Hospital, Harvard Medical School, and Shriners Burns Hospital, 4Division of Transplantation, Department of Surgery, Massachusetts General Hospital, Harvard Medical School


JoVE 52688

 JoVE In-Press

Inducing Ischemia-reperfusion Injury in the Mouse Ear Skin for Intravital Multiphoton Imaging of Immune Responses

1Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Biopolis, 2Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, 3Lee Kong Chian School of Medicine, Nanyang Technological University, 4Centenary Institute for Cancer Medicine and Cell Biology, 5Discipline of Dermatology, University of Sydney, 6Department of Dermatology, Royal Prince Alfred Hospital, 7LSI Immunology Programme, National University of Singapore, 8School of Biological Sciences, Nanyang Technological University

Video Coming Soon

JoVE 54956

 JoVE Bioengineering

Protocol for Relative Hydrodynamic Assessment of Tri-leaflet Polymer Valves

1Tissue Engineered Mechanics, Imaging and Materials Laboratory, Department of Biomedical Engineering, Florida International University, 2Department of Mechanical and Aerospace Engineering, University of Florida, 3College of Medicine, University of Florida, 4King Faisal Specialty Hospital and Research Center, Jeddah, Saudi Arabia


JoVE 50335

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