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Tit dromach/dorsal collapse
Is é tit dromach ná gorú a tharlíon nuair a fáseann an srath ola neamh-cothrom. tá cúpla slí a fedir é seo a tharlú, ach ar dtús cathigh muid foughlam faoi an próseis as-raca agus conas a tharlíon sé sa corp.
dorsal collapse is a condition that is caused by the oil layer and spinal sac developing unevenly. there's a few causes for this, but to understand how these things can happen, we need to understand how the off-racking process happens in the body.
ceim 1: i fánas pór feoil tá an próseis seo toíithe ó brú ar an drom, is é seo chun an drom a chosant de bharr cé cóbh mór is a fásann na fánas seo. i pór éadrom mar na caorín bán-dearg, faoi cúiseana nádúrithe, tosíonn sé leis an rithim inmheánach sa corp de bharr gur nach fasann na fánas seo ró-trom de gnáth.
step 1: off-racking is triggered by pressure on the spine, this is to protect the spinal cord from being damaged under extreme weight. in lighter breeds off-racking can also be triggered by obesity (more on this later) , but under normal circumstances off-racking is triggered by the faun's internal clock.
ceim 2: tógann na néaroga fógra go dtí an hipótalímas sa inteann chun hormón scaradh droma (HSD) a scaoladh.
step 2: the nerves signal to the hypothalamus in the brain to release spinal separation hormone (SSH).
ceim 3: nuair a scaoltear HSD sa corp fásann an srath ola agus an sac drommach, de gnáth clúdian se an drom agus pairt den inteann.
step 3: the SSH causes the oil layer and spinal sac to develop over the spine and part of the brain.
ceim 4: nuair a fáseann an srath ola agus an sac drommach, gearran siad na nearoga agus sriocean an drom leis an corp agus an chuid is mo den inteann, nuiar a scarran an inteann tosíonn se ag fail bas agus tosíonn an fans an innalu agónolach.
step 4: the spinal sac and the oil layer causes the nerves that connect to the rest of the body to die, starting at the tail then moving up to the brain, when the forebrain starts to disconnect this causes agonal breathing.
Fáth tit dromach/causes for dorsal collapse
tarlion tit dromach de bharr brú neamh-cothrom ar an drom, ansin fáseann an srath ola agus sac drommach díreach ar bun an drom. nuar a tharlíon é seo díreach scarann bun an drom agus an inteann agus fighean an fán bás de bhar docar inteanna.
dorsal collapse is caused by uneven pressure on the spine, to protect itself the oil layer and the spinal sac develop over the affected area. this causes only the lower spine and the brain to disconnect instead of the entire spinal cord, causing severe brain damage and eventually killing the faun.
de gnáth tá cheann de trí cúis an fáth go tharlíon tit dromach: tharlíon tit dromach réamhbhreithe nuar ata an fan ag iompar inomarcha leanaírudí do treimse ró-fada. tá an cheann seo an éasca chun réatach, ag brath ar cé cóbh fáda a bhuil an beoir ina torrachas is fédir na leanaírudí a ginmhill no an bhrethe a spreagadh. chun an sighas tit dromach a cosc is fedir geansai beoir (i bpictuir a 3) a chuir orthí má tá sí ag iompar nios mó na 20 leanaírudí.
normally there's one of three causes for this; prenatal dorsal collapse happens when the faun is pregnant with too many babyguys for too long. this form of dorsal collapse is the easiest to treat, depending on how far along they are the pregnancy can either be terminated or the faun can be induced earlier. for beoirs that are at high risk of developing prenatal dorsal collapse (typically if they have a litter of over 20) they can wear a beoir jumper (picture 3).
is é tit dromach meallach nuair atá meall có mór agus trom ag an fán gur bhuil sé ag deanamh docar don drom. dé gnáth tá na mealla seo ná meall ubhagánach, feictear na mealla seo i na pór caorín bán-dearg agus an muic mincéar.
tumorous dorsal collapse is caused by tumors in the abdominal cavity that are so large they cause damage to the spine. normally these are ovarian tumors, breeds like heatherhorns and ballyer blues are very prone to these.
tá tit dromach meachan-gaolta ná nuair deannan meáchan an fán docair do a drom, de gnáth tharlíon sé seo de bharr ionnomarcha saill ar corp an fánas, ach is fedir tharlú nuair a nach bhuil an cnámh-structúir ceart chun comead suas le fás na mattán. ta an gort seo cotíonta le crosanach idir por feoil agus por éadrom (go hairithe crosantach cóta-catach). tá seo neamhchoitianta i por éadrom agus le íslebhéal hormón gneasach (mar shampla, an caorín bán-dearg) de bharr gur briseann a cosaí faoi an meáchan ribhe. de gnath cathigh fánas leis an gort seo a bheith ciondíothaigh
obesity related dorsal collapse is when the fauns weight is damaging the spine. normally this is caused by the faun being too fat, but this can also happen when the faun's bone structure isn't able to keep up with the faun's muscle growth. this is extremely common in meat breed and light breed crosses (particularly curlcoat crosses). this form of dorsal collapse is uncommon in light breeds with low sex hormone levels (like heatherhorns and freckled mildews) as their legs tend to break under the pressure first. fauns with chronic ORDC need to be culled.
sintom an gort seo/symptoms of dorsal collapse:
ball gorm uillmhóir thar bun a drom, níos airde na an peilbheas/ massive bruise at the end of the faun's spine, just over the pelvis.
pairilis, ar dtús i a cosai thiar agus nios deanaí pairilis lan-corpach/paralysis, starting at the back legs then eventually affecting the whole body.
neamhard ar spreagthaí agus gan frithluail/ unresponsive to outside stimuli or reflex responses
inailu agónal/ agonal breathing
agus gan leighsú, bás inteanna/ and without treatment, brain death
tá sé tábhactach chun féacant amach le haigh na sintóm seo, go háirithe tit dromach réamhbhreithe i beoir, tá sé seo an-easca chun mídhiagnóisigh mar tocsaeime torrachas.
its very important to keep an eye out for these symptoms, especially prenatal dorsal collapse in beoirs since its very easy to confuse this with pregnancy toximia.
Connas chuir cosc ar agus é a leighsú/ how to prevent and treat:
pictuir 3, beoir caorion ban-dearg i geansai beoir, uim a teann faoi bolg an fan chun bru ar an drom a leighdu.
picture 3, a heatherhorn beoir wearing a beoir jumper, a harness designed to ease the pressure on the faun's spine
nuair ata tit dromach i a stait luath, is fedir an fan a sabhail ma tugtear instealladh de hormon scarradh droma (HSD) agus iad a chuir as-raca go-homlain. ach mar a scriobhtear thar i cas ata an gort seo ainsealach, cathigh an fan a bheith cuirthe sios.
if you notice dorsal collapse in its early stages, you can save the faun by injecting spinal separation hormone (SSH) to off-rack them fully. although as mentioned above, in cases of chronic dorsal collapse its better to euthenize the faun.