scholarly journals MANOMETRIC STUDIES OF THE PRESSURE VOLUME RELATIONSHIP IN LIVING AND ENUCLEATED EYES OF INDIVIDUAL HUMAN SUBJECTS

1962 ◽  
Vol 46 (9) ◽  
pp. 536-548 ◽  
Author(s):  
J. E. Eisenlohr ◽  
M. E. Langham ◽  
A. E. Maumenee
Keyword(s):  
Human Subjects ◽  
Volume Relationship ◽  
Pressure Volume Relationship ◽  
Manometric Studies ◽  
Individual Human

Curve-fitting analysis of pressure-volume characteristics of the lungs

1977 ◽  
Vol 42 (1) ◽  
pp. 111-116 ◽  
Author(s):  
L. D. Pengelly
Keyword(s):  
Human Subjects ◽  
Normal Lung ◽  
Inflation Pressure ◽  
Programmable Calculator ◽  
Volume Relationship ◽  
Pressure Volume Relationship ◽  
Mammalian Lung ◽  
Normal Human ◽  
Volume Characteristics ◽  
Relationship Of

The pressure-volume relationship of the mammalian lung is markedly curvilinear and in the normal lung, can be shown to fit an exponential function of the form V = V0(1 - K 0e-K1P) in the range of lung volume from FRC to TLC. A method is presented, using a programmable calculator, of determining the parameters V0, K0, and K1, and of deriving related constants of greater physiological significance. Values calculated from pressure-volume curves of 20 normal human subjects are listed, together with coefficients of determination, to demonstrate the adequacy of fit of the method. Half-inflation pressure (h- ln 2/K1), ranged from 2.65 to 9.21 and coefficients of determination (r2) ranged from 0.851 to 0.9998.

Area beneath the end-systolic pressure-volume relationship as an index of inotropicstate in intact dogs

1986 ◽  
Vol 18 ◽  
pp. 20-20 ◽  
Author(s):  
A CROTTOGINI ◽  
J BARRA ◽  
M RODRIGUEZCHATRUC ◽  
R ARMENTANO ◽  
E CABRERA ◽  
...  
Keyword(s):  
Systolic Pressure ◽  
Volume Relationship ◽  
Pressure Volume Relationship

A modified tangent-gas approximation for two-dimensional steady flow

1958 ◽  
Vol 4 (6) ◽  
pp. 600-606 ◽  
Author(s):  
G. Power ◽  
P. Smith
Keyword(s):  
Least Squares ◽  
Steady Flow ◽  
Variational Approach ◽  
Least Squares Method ◽  
Two Dimensional ◽  
Subsonic Flows ◽  
Von Karman ◽  
Straight Line ◽  
Volume Relationship ◽  
Pressure Volume Relationship

A set of two-dimensional subsonic flows past certain cylinders is obtained using hodograph methods, in which the true pressure-volume relationship is replaced by various straight-line approximations. It is found that the approximation obtained by a least-squares method possibly gives best results. Comparison is made with values obtained by using the von Kármán-Tsien approximation and also with results obtained by the variational approach of Lush & Cherry (1956).

Right Ventricular Pressure-Volume Relationship to Evaluate Right Ventricular-Pulmonary Arterial Coupling and Energetics

2015 ◽  
Vol 21 (10) ◽  
pp. S152
Author(s):  
Takafumi Sakamoto ◽  
Kohtaro Abe ◽  
Kazuya Hosokawa ◽  
Keiji Oi ◽  
Yasushi Mukai ◽  
...  
Keyword(s):  
Right Ventricular ◽  
Ventricular Pressure ◽  
Volume Relationship ◽  
Pressure Volume Relationship ◽  
Pulmonary Arterial

scholarly journals Learning to play the piano with the Supernumerary Robotic 3rd Thumb

2020 ◽  
Author(s):  
Ali Shafti ◽  
Shlomi Haar ◽  
Renato Mio Zaldivar ◽  
Pierre Guilleminot ◽  
A. Aldo Faisal
Keyword(s):  
Motor Learning ◽  
Time Scales ◽  
Motor Coordination ◽  
Human Subjects ◽  
A Priori ◽  
Musical Score ◽  
Short Time ◽  
Human Augmentation ◽  
Individual Motor ◽  
Individual Human

AbstractWe wanted to study the ability of our brains and bodies to be augmented by supernumerary robot limbs, here extra fingers. We developed a mechanically highly functional supernumerary robotic 3rd thumb actuator, the SR3T, and interfaced it with human users enabling them to play the piano with 11 fingers. We devised a set of measurement protocols and behavioural “biomarkers”, the Human Augmentation Motor Coordination Assessment (HAMCA), which allowed us a priori to predict how well each individual human user could, after training, play the piano with a two-thumbs-hand. To evaluate augmented music playing ability we devised a simple musical score, as well as metrics for assessing the accuracy of playing the score. We evaluated the SR3T (supernumerary robotic 3rd thumb) on 12 human subjects including 6 naïve and 6 experienced piano players. We demonstrated that humans can learn to play the piano with a 6-fingered hand within one hour of training. For each subject we could predict individually, based solely on their HAMCA performance before training, how well they were able to perform with the extra robotic thumb, after training (training end-point performance). Our work demonstrates the feasibility of robotic human augmentation with supernumerary robotic limbs within short time scales. We show how linking the neuroscience of motor learning with dexterous robotics and human-robot interfacing can be used to inform a priori how far individual motor impaired patients or healthy manual workers could benefit from robotic augmentation solutions.

scholarly journals Linear end-systolic pressure-volume relationship during pulsatile left ventricular bypass represents native heart function

1995 ◽  
Vol 109 (4) ◽  
pp. 780-786 ◽  
Author(s):  
Osamu Kawaguchi ◽  
John S. Sapirstein ◽  
William B. Daily ◽  
Walter E. Pae ◽  
William S. Pierce
Keyword(s):  
Heart Function ◽  
Systolic Pressure ◽  
Left Ventricular ◽  
Volume Relationship ◽  
Pressure Volume Relationship

scholarly journals Under Pressure: Intraluminal Filling Pressures of Postpartum Hemorrhage Tamponade Balloons

2017 ◽  
Vol 07 (02) ◽  
pp. e86-e92 ◽  
Author(s):  
Kathleen Antony ◽  
Diana Racusin ◽  
Michael Belfort ◽  
Gary Dildy
Keyword(s):  
Postpartum Hemorrhage ◽  
Ex Vivo ◽  
Volume Ratio ◽  
Intraluminal Pressure ◽  
Acute Hemorrhage ◽  
Volume Relationship ◽  
Pressure Volume Relationship ◽  
Relationship Of ◽  
Condom Catheter ◽  
Filling Capacity

Objective Uterine tamponade by fluid-filled balloons is now an accepted method of controlling postpartum hemorrhage. Available tamponade balloons vary in design and material, which affects the filling attributes and volume at which they rupture. We aimed to characterize the filling capacity and pressure-volume relationship of various tamponade balloons. Study Design Balloons were filled with water ex vivo. Intraluminal pressure was measured incrementally (every 10 mL for the Foley balloons and every 50 mL for all other balloons). Balloons were filled until they ruptured or until 5,000 mL was reached. Results The Foley balloons had higher intraluminal pressures than the larger-volume balloons. The intraluminal pressure of the Sengstaken-Blakemore tube (gastric balloon) was initially high, but it decreased until shortly before rupture occurred. The Bakri intraluminal pressure steadily increased until rupture occurred at 2,850 mL. The condom catheter, BT-Cath, and ebb all had low intraluminal pressures. Both the BT-Cath and the ebb remained unruptured at 5,000 mL. Conclusion In the setting of acute hemorrhage, expeditious management is critical. Balloons that have a low intraluminal pressure-volume ratio may fill more rapidly, more easily, and to greater volumes. We found that the BT-Cath, the ebb, and the condom catheter all had low intraluminal pressures throughout filling.

Changes in left ventricular performance after global ischemia: Assessing LV pressure-volume relationship

1994 ◽  
Vol 57 (1) ◽  
pp. 151-156 ◽  
Author(s):  
Ryousuke Matsuwaka ◽  
Hikaru Matsuda ◽  
Ryota Shirakura ◽  
Mitsunori Kaneko ◽  
Norihide Fukushima ◽  
...  
Keyword(s):  
Left Ventricular ◽  
Global Ischemia ◽  
Left Ventricular Performance ◽  
Ventricular Performance ◽  
Volume Relationship ◽  
Pressure Volume Relationship
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