emergency surgery and cardiac devices

... 319 -2 -4 Respiratory Visits Residual Air Pollution on Emergency Room Visits 20 40 60 80 PM2.5 Lag Figure 1: A plot of the residual counts of emergency room visits respiratory disease in 0-14 years ... a standardized system for medical surveillance, the acquisition and categorization of data from emergency department patient records can be costly and cumbersome In the United States, for example, ... centralized collection of detailed medical information for 2.7 million people, including visits to emergency rooms in major medical centers and small clinics in Taipei The database provide a unique...

Ngày tải lên: 29/03/2014, 18:20

... in the CABG surgery group than in the valve surgery or combined surgery groups (Table 5) The specificity and the negative predictive value were significantly less in the combined surgery group ... coronary artery bypass graft, valve surgery, or combined cardiac surgery Characteristic Coronary artery bypass graft (n = 225) Valve surgery (n = 225) Combined surgery (n = 225) Age (years) 73 ± ... among the three groups of surgery cTnI was increased in patients undergoing combined surgery when compared with CABG patients and valve surgery patients, while CABG surgery was associated with...

Ngày tải lên: 13/08/2014, 08:20

... hyperlactatemia after cardiac surgery Chest 2003, 12:1361-1366 doi:10.1186/cc9017 Cite this article as: O’Connor ED, Fraser JF: Hyperlactatemia in critical illness and cardiac surgery Critical Care 2010, ... LacMAX, maximal lactate concentration; LacTW, time-weighted lactate concentration; Surg Only, only surgery patients Abbreviations CI, confidence interval; LHL, late hyperlactatemia; OR, odds ratio ... II; Card/Vasc Only, only cardiac/vascular patients; Card/Vasc & Surg Only, only cardiac/vascular surgery patients; CI, confidence interval; Full group, all patients admitted to the intensive care...

Ngày tải lên: 13/08/2014, 20:22

... Sclater Chapter 5/3/01 10:19 AM Page 52 MECHANISMS THAT SORT, FEED, OR WEIGH ORIENTING DEVICES Here’s a common problem; Parts arrive in either open-end or closed-end first; you need a ... it avoids the cam-based mechanisms more commonly used for accomplishing this job SIMPLE FEEDING DEVICES The oscillating sector picks up the desired number of parts, left diagram, and feeds them ... rotating wheels form a simple device for alternating the feed of two different workpieces SORTING DEVICES In the simple device (A) the balls run down two inclined and slightly divergent rails The...

Ngày tải lên: 22/10/2012, 14:26

... it is stationary 121 Sclater Chapter 5/3/01 10:45 AM Page 122 FRICTION DEVICES FOR INTERMITTENT ROTARY MOTION Friction devices are free from such common disadvantages inherent in conventional ... twostop operations, and they have difficulty producing three stops per index Most two-stop indexing devices available are cam-operated, which means they require greater input angles for indexing Geared ... wheel is driven approximately 60º, and then it stops for the remaining 300º ROTARY-TO-RECIPROCATING DEVICES In a typical scotch yoke, a, the motion of the rotating input crank is translated into the...

Ngày tải lên: 22/10/2012, 14:26

... Sclater Chapter 5/3/01 11:45 AM Page 134 TWELVE EXPANDING AND CONTRACTING DEVICES Parallel bars, telescoping slides, and other devices that can spark answers to many design problems Figs and Expanding ... patent has been granted, and the linkage was applied to a camera to replace slides and telescoping devices Linkages, with their minimal pivot friction, serve many useful purposes in machinery, replacing ... plates) Other prior mechanisms relied on spring loading, differential multiple-point drives and other devices to reduce backlash In providing three-point drive along a track between the movable and...

Ngày tải lên: 22/10/2012, 14:26

... equals LA + LB 195 Sclater Chapter 5/3/01 12:25 PM Page 196 FOURTEEN ADJUSTING DEVICES Here is a selection of some basic devices that provide and hold mechanical adjustment Fig A spring-loaded pin ... spring rate can be easily varied, and it is not subject to permanent set Air springs are elastic devices that employ compressed air as the spring element They maintain a soft ride and a constant ... variations about a preFig determined level Sclater Chapter 5/3/01 12:25 PM Page 191 TWENTY SCREW DEVICES A threaded shaft and a nut plus some way to make one of these members rotate without translating...

Ngày tải lên: 22/10/2012, 14:26

... properly seated 216 Sclater Chapter 5/3/01 12:33 PM Page 217 EIGHT SNAP-ACTION DEVICES Another selection of basic devices for obtaining sudden motion after a gradual buildup of force Fig A torsion ... III come into toggle Sclater Chapter 5/3/01 12:33 PM Page 213 SIXTEEN LATCH, TOGGLE, AND TRIGGER DEVICES Diagrams of basic latching and quick-release mechanisms Fig Cam-guided latch (A) has one ... increasing load until friction is suddenly overcome This is a useful action for small sensitive devices where large forces and movements are undesirable This is the way we snap our fingers That...

Ngày tải lên: 22/10/2012, 14:26

... logarithmic spiral gears shown in (A), are open-curved They are usually components in computing devices The elliptically shaped gears, shown in (B), are closed curved They are components in automatic...

Ngày tải lên: 22/10/2012, 14:26

... in the tape drive shown Fig Two dual-spring clutches are in this tape drive Spring clutches are devices for driving a load in one direction and uncoupling it when the output is overdriven or the ... forward speed Sclater Chapter 5/3/01 12:57 PM Page 311 SEVEN OVERRUNNING CLUTCHES These are simple devices that can be made inexpensively in the workshop Fig A lawnmower clutch Fig Molded sprags ... (20º in this case) into a one-way motion to advance an inking ribbon One of the simplest known devices was used to obtain the one-way drive—a spring clutch which is a helical spring joining two...

Ngày tải lên: 22/10/2012, 14:26

... small steam turbines 365 Sclater Chapter 10 5/3/01 1:08 PM Page 366 SPEED CONTROL DEVICES FOR MECHANISMS Friction devices, actuated by centrifugal force, automatically keep speed constant regardless ... control follows the summation of the errors in the material and the indicator itself The controlling devices, which are operated by the indicators, determine the degree of speed change required to ... will give a drag or tension that is reasonably constant over a wide speed range The other braking devices mentioned here will exert a torque that will vary widely with speed, but will be definite...

Ngày tải lên: 22/10/2012, 14:26

... MUSCLE WITH PYROTECHNIC POWER Cartridge-actuated devices generate a punch that cuts cable and pipe, shears bolts for fast release, and provides emergency thrust 402 Sclater Chapter 11 5/3/01 1:17 ... process pressure 381 Sclater Chapter 11 5/3/01 1:16 PM Page 382 DIFFERENTIAL TRANSFORMER SENSING DEVICES Gage pressure bellows transmitter The bellows is connected to a cantilever beam with a needle ... Sclater Chapter 11 5/3/01 1:16 PM Page 387 PERMANENT MAGNET MECHANISMS Fig A suspension Fig Tension devices Fig An instrument coupling Fig A reel brake Fig A crankcase oil drain plug Fig A non-rattling...

Ngày tải lên: 22/10/2012, 14:26

... in selected position); (2) overload devices in mechanical linkages (they shift to the opposite position when sufficiently loaded); and (3) energy-storage devices Two applications, shown in Fig ... actual example A simulator for testing artificial knee joints, built by the Department of Orthopedic Surgery, Columbia University, under the direction of Dr N Eftekhar, is shown schematically The drive ... 5/3/01 1:32 PM Page 437 Fig A four-slot geneva (A) and an eight-slot geneva (B) Both have locking devices Consider an external geneva wheel, shown in Fig 1, in which n = number of slots a = crank...

Ngày tải lên: 22/10/2012, 14:26

... microminiature motors, sensors, gear trains, valves, and other devices that easily fit on a silicon microchip, but difficulties in powering these devices has inhibited their practical applications MEMS ... commercial demand Initially ADI built these devices by interleaving, combining, and customizing its internal manufacturing processes to produce the micromechanical devices with the same processes it used ... solenoids because those forces are too weak when scaled to the small sizes required to power the devices The high power consumption required to concentrate enough heat in a small local area to...

Ngày tải lên: 22/10/2012, 14:26

... Data Sclater, Neil Mechanisms and mechanical devices sourcebook / Neil Sclater, Nicholas P Chironis.— 3rd ed p cm Rev ed of: Mechanisms & mechanical devices sourcebook / [edited by] Nicholas P ... Edition of Mechanisms and Mechanical Devices Sourcebook after the death of Mr Chironis The late Nicholas P Chironis developed the concept for Mechanisms and Mechanical Devices Sourcebook, and was the ... 1996 ISBN 0-07-136169-3 Mechanical movements I Chironis, Nicholas P II Mechanisms & mechanical devices sourcebook III Title TJ181.S28 2001 621.8—dc21 2001030297 Copyright © 2001, 1996, 1991 by...

Ngày tải lên: 22/10/2012, 14:26

... loosening the screw 413 Sclater Chapter 12 5/3/01 1:25 PM Page 414 FRICTION CLAMPING DEVICES Many different devices for gaining mechanical advantage have been used in the design of friction clamps ... quickly released on demand is required Some suggested applications for this mechanism are in coupling devices for load-carrying carts or trucks, hooks or pick-up attachments for cranes, and quick-release ... 1:25 PM Page 416 DETENTS FOR STOPPING MECHANICAL MOVEMENTS Some of the more robust and practical devices for stopping mechanical movements are illustrated here Fixed holding power is constant in...

Ngày tải lên: 22/10/2012, 14:26

... Detectors, jam Detents axial magnetic Detents cont positive radial stopping movement for roller Devices adjustable pitch speed spacecrank adjusting anti-backlash cartridge-actuated clamping clamping ... 53 402 234 92 114 114 191 202 191 192 53 217 54 366 383 417 416 414 422 123 114 387 Index Terms Devices cont tilting time-delay switching toggle translation-to-rotation variable-speed weight-regulating ... Hammers, spring-operated Hoist Holder, instrument Holding fixtures, spring-loaded Hook release, emergency Hoppers Hydraulics control system cylinders drives intensifier, multi-plunger motors pumps,...

Ngày tải lên: 22/10/2012, 14:27

... by self-trained engineers, scientists, and technicians By themselves, many of the mechanisms and devices described in this book are just mechanical curiosities, but when integrated by creative...

Ngày tải lên: 22/10/2012, 14:27

... reprogrammable, multifunction manipulator designed to move material, parts, tools, or specialized devices through variable programmed motions to perform a variety of tasks Robots can be floor-standing, ... can control the movements of the robot arm or manipulator with pushbuttons or other data input devices so that it is run manually through its complete task Fig Components of a floor-standing, ... driver The drivers are mounted directly on the baseplate, without any intervening power-transmission devices, like gears or belts, that could reduce stiffness and precision The position and orientation...

Ngày tải lên: 22/10/2012, 14:27