Unit 1 - Equine Respiratory Diagnostics Flashcards

1
Q

What kind of big ticket items should you ask a horse owner about in respiratory illness cases?

A

Living environment, feeding, vaccine history, travel or stress inducing events, the horse’s job, performance

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2
Q

Where should all respiratory evaluations start?

A

Observe from a distance, followed by a complete physical exam.

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3
Q

What is the term for normal breathing? Increased rate with reduced tidal volume? Difficulty breathing?

A

Eupnea, tachypnea, dyspnea

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4
Q

What is the term for increased respiratory rate with increase tidal volume?

A

Hyperpnea

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5
Q

What is included in the upper respiratory tract?

A

Anything cranial to the thoracic inlet. Anything caudal is lower respiratory tract

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6
Q

What might you look at in the nares? Mouth?

A

Nares: air flow may be unequal and the nares may be flared In the oral cavity, smell for foul breath. Abnormal breath should elicit a complete oral exam and consideration of sinus involvement.

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7
Q

How can you make a horse breathe deeply?

A

Rebreathing exam

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8
Q

What abnormal results are associated with rebreathing exams?

A

Abnormal results include coughing, increased effort, and increase respiratory sound.

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9
Q

When shouldn’t you do a rebreathing exam?

A

Don’t do in a dyspneic patient or one with a history of aspiration pneumonia.

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10
Q

How should you characterize nasal discharge?

A

Unilateral or bilateral, persistent or intermittent, smell, consistency, color, presence of feed material

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11
Q

Why do we use endoscopy?

A

To evaluate the status of the upper and lower respiratory system, including some degree of function, anatomy, and lesions.

You should evaluate before and after anesthesia.

You can see turbinates, drainage, nasopharynx, guttural pouches, larynx, and more.

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12
Q

1

A

palatopharyngeal arch

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13
Q

2

A

arytenoids

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14
Q

3

A

epiglottis

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15
Q

What nerves can be found in or very near to the guttural pouches?

A

Nerves: 9-12 and the cranial cervical ganglion. Cranial nerve 7 is outside but directly adjacent to the lateral compartment.

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16
Q

What divides the guttural pouch in half?

A

Stylohyoid bone

17
Q

What are the three important equine radiology locations?

A

Sinuses/dental, Pharynx/larynx/guttural pouches, and thorax

18
Q

What sinuses typically are most commonly diseased in horses?

A

maxillary, frontal, and ventral conchal

19
Q

True or false: for most screening ultrasounds, you don’t need to clip the hair.

A

True: for most screening ultrasounds, you don’t need to clip the hair.

20
Q

Where do we most commonly sample for Arterial Blood Gas analysis?

A

metatarsal artery, temporal artery, facial artery, brachial artery

21
Q

What drug must used during arterial blood gas sampling? Why?

A

Must use heparin - All gas bubbles must be removed and the syringe capped. Use a short, 25 G needle and 1-3 ml syringe.

22
Q

________ means decreased oxygen tension of the arterial blood (decreased PO2).

A

hypoxemia

23
Q

______ means decreased oxygen concentration at the level of the tissue, with or without hypoxemia.

A

hypoxia

24
Q

An increase in PaCO2 is known as what?

A

Hypercapnia

25
Q

How do we collect samples in the sinuses?

A

Sinus trephination

26
Q

How do we sample airway secretions?

A

Tracheobronchial aspirate: Cytology and culture

Bronchoalveolar lavage - cytology

27
Q

Where do you pass a trochar for tracheobronchial aspirate?

A

Through the annular ligament between two tracheal rings.

28
Q

What frequently occludes the equine fenestrated mediastinum?

A

Inflammatory debris when sick. Requires thoracocentesis from each side.

29
Q

What are some tests that can be done for respiratory illness?

A

cytologic evaluation of fluid samples, microbial culture techniques, immunologic techniques, molecular techniques: PCR