Monthly Archives: May 2019


21
May 2019
alpaca face

A normal llama and alpaca pregnancy lasts for an average of 11 and 11.5 months, respectively. Pregnancy is not visually obvious until late pregnancy (if at all) in either species of camelid. The traditional alpaca “spit off” method, where the female treats the male with hostility, actually only confirms ovulation – not a successful pregnancy. It would have to be repeated multiple times several weeks after the last mating to confirm that the female is not pregnant, and even this is not fool-proof, with less experienced female alpacas known to accept the......

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11
May 2019

When and where should I get my dog scanned for pregnancy? Getting your dog scanned for pregnancy with ultrasound is very reliable and accurate, provided it is performed: At the right time By a trained, experienced professional With the right equipment Each of these points is discussed in turn below.   The right time: When should I get my dog scanned? The earliest you should book an appointment with a mobile pregnancy scanner is when your dog would be at 30 days gestation. If you have been performing progesterone testing, you may......

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09
May 2019

Tissue Harmonic Imaging is a relatively recent discovery that greatly improves image quality, primarily due to a great reduction in the amount of ultrasound artifacts (see Chapter 14 of Ultrasound for Canine Pregnancy Scanning). Put simply, it involves sending out ultrasound at one frequency, but only using higher returning frequencies (that we didn’t used to know were even generated!) to generate the image. These higher frequencies are created as the ultrasound waves pass through tissue, so are particularly helpful when scanning larger animals – less helpful when scanning shallow structures that are......

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09
May 2019

Dogs and cats with significant mitral regurgitation (MR) may show pulmonary venous flow reversal. Flow reversal is a supporting measure only, and not specific enough to be used as a standalone method of grading MR severity.   Normal pulmonary vein flow pattern The normal flow pattern of the pulmonary veins shows two forward-flowing waves – systolic (S) and diastolic (D). The S wave should be of equal or greater velocity than the D wave. There is also a small reversal wave (Ar) that occurs at the time of atrial contraction. This is present even......

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07
May 2019

An increasing number of AUA members are turning to scanners with Doppler capability as their next ultrasound machine. Primarily, this is due to the higher resolution images they tend to produce (colour Doppler systems use higher spec graphics cards and other components, so even if you never use your colour, you still benefit from improvements in performance), but there are ways you can put your Colour Doppler to good use.     Remember that Doppler imparts higher levels of ultrasonic energy, and should be used sparingly over the foetus itself. Obstetric sonographer......

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