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| ==Introduction== | | ==Introduction== |
| Uterine inertia describes the '''failure of the uterus''' to expel a foetus normally and is a common cause of [[Dystocia - Dog & Cat|'''canine and feline dystocia''']]. | | Uterine inertia describes the '''failure of the uterus''' to expel a foetus normally and is a common cause of [[Dystocia - Dog & Cat|'''canine and feline dystocia''']]. |
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| :'''Breed predisposition''' | | :'''Breed predisposition''' |
| :'''Large litter''' overstretching the uterus | | :'''Large litter''' overstretching the uterus |
− | :'''Small litter''' not stimulating the uterus enough. Small foetuses cannot apply enough pressure on the uterine wall and cervix to set up the [[Parturition Endocrine Control - Anatomy & Physiology|Fergusson reflex]]. | + | :'''Small litter''' not stimulating the uterus enough. Small foetuses cannot apply enough pressure on the uterine wall and cervix to set up the [[Parturition Endocrine Control - Anatomy & Physiology#Ferguson Reflex|Fergusson reflex]]. |
− | :'''Systemic disease''': Obesity and lack of excercise, hypocalcaemia, septicaemia. | + | :'''Systemic disease''': Obesity and lack of exercise, [[hypocalcaemia]], septicaemia. |
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| Complete primary uterine inertia occurs if '''2nd stage labour''' does not begin. Partial inertia occurs if the 2nd stage begins but contractions soon fail. | | Complete primary uterine inertia occurs if '''2nd stage labour''' does not begin. Partial inertia occurs if the 2nd stage begins but contractions soon fail. |
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| == Secondary Uterine Inertia == | | == Secondary Uterine Inertia == |
− | Uterine muscles become '''exhausted after prolonged contractio'''n against an obstructing or oversized foetus or during birth of a large litter. There is usually subclinical '''hypocalcaemia and/or hypoglycaemia'''. | + | Uterine muscles become '''exhausted after prolonged contraction''' against an obstructing or oversized foetus or during birth of a large litter. There is usually subclinical '''hypocalcaemia and/or hypoglycaemia'''. |
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| This can occur in the sow, bitch and guinea pig. | | This can occur in the sow, bitch and guinea pig. |
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| + | ==Diagnosis== |
| + | '''Physical examination''' may help identify foetuses in the birth canal. Digital examination of the vagina will also enable the uterine and vaginal tone to be assessed. |
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− | <big>'''See also: [[Dystocia - Dog & Cat|Dystocia in the Dog and Cat]]'''</big> | + | Lack of a response to pressure per vaginum indicates a '''lack of the [[Parturition Endocrine Control - Anatomy & Physiology#Ferguson Reflex|Ferguson reflex]]''' which indicates uterine intertia. |
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| + | '''Radiography''' can be taken to assess the number and size of foetuses. |
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| + | '''Ultrasound''' can help assess foetal viability. |
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| + | ==Treatment== |
| + | If the bitch is in good condition with normal sized puppies and no obstruction, '''medical treatment''' can be attempted. |
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| + | '''Oxytocin''' can be administered intramuscularly, repeated at 30 minutes for a maximum of 3 injections. |
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| + | '''Calcium gluconate''' or dextrose solution can also be administered if a suspicion of hypocalcaemia or hypoglycaemia exists. |
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| + | A '''caesarean section''' is indicated if there is no response to the oxytocin, or if the foetuses are too large for a vaginal birth. |
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| + | <big>'''See also: [[Dystocia - Dog & Cat#Clinical approach to dystocia in small animals|Clinical Approach to Dystocia in the Dog and Cat]]'''</big> |
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| {{Learning | | {{Learning |
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| Noakes, D. (2001) '''Arthur's Veterinary Reproduction and Obstetrics''' ''Elsevier Health Sciences'' | | Noakes, D. (2001) '''Arthur's Veterinary Reproduction and Obstetrics''' ''Elsevier Health Sciences'' |
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− | [[Category:To Do - Helen]]
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− | [[Category:To Do - Review]]
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| + | {{review}} |
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| + | ==Webinars== |
| + | <rss max="10" highlight="none">https://www.thewebinarvet.com/urogenital-and-reproduction/webinars/feed</rss> |
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| + | [[Category:Expert Review - Small Animal]] |
| [[Category:Reproductive Disorders]][[Category:Parturition]][[Category:Reproductive Diseases - Dog]] | | [[Category:Reproductive Disorders]][[Category:Parturition]][[Category:Reproductive Diseases - Dog]] |
− | [[Category:To Do - Clinical]]
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