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Radiography > Revision > Flashcards

Revision Flashcards

1
Q

Xray photons are generated in the tube head

A

Contains two electrodes

Negatively charged cathode
Positively charged anode

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2
Q

Electrons are produced at cathode (a coiled wire filament)

A

Tungsten is used as filament as has a high atomic number (74) and high melting point (3380oc)

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3
Q

The filament sits in a nickel or molybdenum focusing Cup at a negative potential so repels the elections causing to form a narrow beam.

A

Multiplying the ma by duration reflects the total quantity of xray photons emitted in millampre secs.

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4
Q

The potential difference between filament and target needs to be very high and many times voltage of mains supply of 240 volts.

A

It’s measured in 1000s of volts or kv. And created from mains in a second electrical circuit using step up or high tension transformer - also part of the electrical circuitry of x Ray machine.

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5
Q

A common preservative in fixer is

A

Sodium sulphite

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6
Q

A dog inspires once every respiratory cycle and breathes 100mls in and out. What is the mv?

A

2L

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7
Q

A film that is too dark may be the result of

A 
Over exposure
Gross over development
Temp of developer too high
Fogging
Ffd too short
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8
Q

An example of a natural absorbable suture material is

A

Catgut

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9
Q

Anticholinergics often used in premed

A

To decrease salivary and bronchial secretions

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10
Q

Apposing sutures are those that are placed

A

With the wound edges in direct contact with one another

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11
Q

A suture property that is not ideal

A

High capillarity

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12
Q

A rad requires exposure of 20mAs when ffd at 90 cm with a grid. What exposure factor will be required if a grid with a factor of 2 is used?

A

40mAs

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13
Q

A simple continuous suture pattern should not be used in

A

Hollow organs

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14
Q

Assuming all other factors stay same, rads obtained with setting of 0.05sec and 200mAs are identical to

A

0.1 sec and 100mA

So if ma is halved then double seconds

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15
Q

When anaesthetised first reflex to go is

A

Anal

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16
Q

A trolley should be draped

A

Back to front

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17
Q

Flow rate of oxygen and nitrous oxide for 30kg on magill lack with mv of 200ml/kg

A

30 x 200 x1

Divide by three then x by 2 to get nitrous

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18
Q

Computer aided tomography is carried out using

A

X rays

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19
Q

Tissue sample containers

A

Wide necked

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20
Q

Diastolic BP should not drop below

A

150mm/hg

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21
Q

Drains are indicated in

A

Abolishing dead space in wounds
Drainage of contaminated wounds
Removal of air from body cavities

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22
Q

Hydrophyllic drugs are more easily absorbed

A

Iv or im

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23
Q

Lipophyllic drugs are more easily absorbed

A

Po or sc

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24
Q

If increase film to object distance the image is

A

Magnified

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25
Q

In relation to sutures, memory describes

A

Tendency of material to straighten out after lopps developed

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26
Q

Polycthemia

A

Increase erythrocytes

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27
Q

Polydioxanone provides wound support for

A

60 days

28
Q

Respiratory acidosis occurs

A

When blood pH falls

29
Q

Suspensions cannot be administered

A

Iv

30
Q

Prn

A

As required

31
Q

The absorbable material most suitable for contaminated sites

A

Polyflycolic acid

32
Q

Condition most requiring correction of hypoperfusion pre op

A

Renal

33
Q

Expiratory valve on circuit should normally be

A

Fully open

34
Q

The filament in x Ray machine is heated by

A

A step down transformer

35
Q

Fluid fraction obtained after clotted blood is centrifuge is

A

Serum

36
Q

The more highly protein unbound a drug is

A

The less free drug there is available to distribute into body tissue

37
Q

Most suitable type of needle for suturing skin

A

Straight, reverse cutting

38
Q

The plate that contains round holes at each end is

A

Venables

39
Q

Prescription abbreviations ac

A

After food

40
Q

The screw which is fully threaded and has rounded tip

A

Cortical

41
Q

Intravenous urography

A

Highlights ureters

42
Q

Too high kv

A

Low contrast

43
Q

Underdeveloped film

A

Too pale

44
Q

Waters canister

A

Contains soda lime part of to and fro circuit

45
Q

Best position for doe spay

A

Dorsal rec with chest and head slightly raised

46
Q

What type drain requires suction pump

A

Close passive

47
Q

When use cylindrical drum for storage of cheatle forceps, WHICH parts are sterile?

A

The inner base

48
Q

When using asif technique which drill bit size would use for 2.7mm screw

A

2.0

49
Q

What category does most livestock medicinal products belong to

A

Pom-vps

50
Q

Pethidine

A

Must be kept in a locked receptacle under misuse of drugs act 1971

51
Q

MA

A

Effects the amount of xrays produced

52
Q

A rongeur

A

Has cupped Jaws and nibbles bone

53
Q

Hohman

A

Is a handheld retractor

54
Q

Polyglycolic acid

A

Is absorbable

55
Q

When handling monochromatic film

A

A brown safelight filter is used

56
Q

Polyglycolic acid

A

Can not be autoclaved

57
Q

Formula relating to inverse square law

A

Double the distance from film = intensity of primary beam reduced by a quarter

58
Q

Active ingredient in film developer

A

Phenidone-hydroquinone
Metal-hydroquinone
Both alkaline

59
Q

What colour does metal show on xray

A

White

60
Q

Self retaining retractors

A

Gelpi,
Gossett
West

61
Q

A vertical pressure cooker works at

A

15 psi at 121 oc

62
Q

Hot sir oven can sterilise

A

Drill bits
Test tubes
Liquids

63
Q

Hot air ovens

A

Are economical
Don’t corrode instruments
Good for glassware

Have long sterilising times

64
Q

Suxmethonium

A

Depolarising muscle relaxant

65
Q

To and fro

A

May cause hyperthermia

66
Q

Thiopentone sodium
Intraval
Methohexitone are all

A

Barbiturates

67
Q

Pedicle graft

A

Transfer section of skin to adjacent area

Radiography (3 decks)

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