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16 Cards in this Set

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A passage between two natural body channels, such as blood vessels, especially one created surgically to divert or permit flow from one pathway or region to another; a bypass.
GENERAL MEDICAL DEFINITION OF SHUNT
WHAT ARE THE 3 COMMON CAUSES OF A CAPILLARY SHUNT
1 ATELECTASIS (ALVEOLAR COLLAPSE)
2 ALVEOLAR FLUID ACCUMULATION
3 ALVEOLAR CONSOLIDATION
A PT WITH AN INCREASED VQ RATIO IS SAID TO HAVE? WHAT ARE SOME DISEASES THAT MAY HAVE THIS
DEAD SPACE VENTILATION
BECAUSE THE EXCESS WILL BE WASTED
SHUNT IN RESPIRATORY REFURS TO? COMMON DISEASES?
DECREASED VQ RATIO (VENTILATION TO PURFUSION)
ASTHMA, PNEUMONIA
DECREASE VENTILATION IN BLOOD FLOW
NORMAL VQ RATIO AND WHAT IT REFURS TO
4:5 OR.8
VENTILATION TO PREFUSION
REFURS TO THE ALVEOLAR VENTILATION 4LPM TO PULMONARY CAPILLARY BLOOD FLOW 5LPM
PHYSIOLOGICAL DEAD SPACE IS THE COMBINATION OF WHAT TWO TYPES OF DEAD SPACE'S
ANATOMICAL AND ALVEOLAR
DEAD SPACE IN SHORT MEANS
WASTED VENTILATION
DOESN'T PARTICIPATE IN GAS EXCHANGE
EXPLAIN SHUNT AS FAR AS RESPIRATORY WISE, IN THE TWO BROAD BRANCHES
BRANCH 1 RIGHT TO LEFT
A BYPASS BETWEEN THE VENOUS (RIGHT) AND ARTERIAL (LEFT) SIDES OF THE CIRCULATION. POORLY OXYGENATED VENOUS BLOOD INTO THE ARTERIAL BLOOD CAUSING A DECREASE IN OXYGENATION.
BRANCH 2 LEFT TO RIGHT
OXYGEN CONTENT OF THE ARTERIAL BLOOD IS NOT AFFECTED. HOWEVER CARDIAC WORKLOAD IS SIGNIFICANTLY INCREASED.
THE TWO RIGHT TO LEFT ANATOMICAL SHUNTS WHICH EXIST IN THE NORMAL HUMAN BEING
AND HOW DO THESE SHUNTS WORK
1THE BRONCHIAL VENOUS DRAINAGE
2THE THEBESAIN VENOUS DRAINAGE

BY DIVERTING POORLY OXYGENATED VENOUS BLOOD INTO THE ARTERIAL CIRCULATION CAUSING LOWER OXYGEN CONTENT IN THE ARTERIAL BLOOD
EXPLAIN SHUNT AS FAR AS RESPIRATORY WISE IN THE TWO BROAD BRANCHES
RIGHT TO LEFT BRANCH 1
A BYPASS BETWEEN THE VENOUS (RIGHT) AND ARTERIAL (LEFT) SIDES OF THE CIRCULATION. POORLY OXYGENATED VENOUS BLOOD INTO THE ARTERIAL BLOOD CAUSING A DECREASE IN TOTAL OXYGENATION.
LEFT TO RIGHT BRANCH 2
OXYGEN CONTENT OF THE ARTERIAL BLOOD IS NOT AFFECTED. HOWEVER CARDIAC WORKLOAD IS SIGNIGICANTLY INCREASED
SHUNT EXPLAINED IN ITS SIMPLEST FORM
A PATH
SURGICALLY A PHYSICIAN WILL REROUTE FOR A NEW PATH FOR FLUID ETC
DEADSPACE: RESPIRED GAS VOLUME THAT DOES NOT PARTICIPATE IN GAS EXCHANGE (THE PORTION THAT IS RE-ENTERED NOT FRESH) CAN BE EITHER ANATOMIC, ALVEOLAR, OR MECHANICAL. EXPLAIN ALVEOLAR
ANATOMICAL-NORMAL FOR EVERYONE
FOR EVERY POUND A PT WEIGHS, IS HOW MANY ML OF OXYGEN THAT DOESN'T PARTICIPATE IN GAS EXCHANGE AS IT IS REBREATHED
EX: 150POUND PT 150ML DEAD SPACE
EXPLAIN THE ALVEOLAR DEADSPACE
THE ALVEOLI ARE NOT PREFUSING WITH VENOUS BLOOD. PULMONARY EMBOLISM WILL CAUSE THIS BY BLOCKING A PORTION OF THE PULMONARY CIRCULAION
WHAT TYPES OF SHUNTING IS REFRACTORY TO OXYGEN THERAPY AND WHY
CAPILLARY SHUNT
BECAUSE THE ALVEOLI ARE UNABLE TO PROVIDE ANY 02/CO2 EXCHANGE FUNTION. IN OTHER WORDS NO BENIFIT
THE SUM OF WHICH TWO SHUNTS IS CONSIDERED A TRUE OR ABSOLUTE SHUNT
ANATOMIC SHUNT

2-5%
ALVEOLAR- A SECOND KIND OF DEAD SPACE MEANS
THAT THE ALVEOLI ARE NOT PERFUSING WITH VENOUS BLOOD. A PULMONARY EMBOLIS WILL CAUSE THIS BY BLOCKING A PORTION OF THE PULMONARY CIRUCULATION