Dog Feeding

Administration of Extreme Hypomagnesemia in a Cat


Refeeding syndrome is characterised by metabolic and physiologic abnormalities throughout refeeding after hunger in each folks and animals. Refeeding syndrome has been documented to incorporate relative deficiencies in phosphorus, potassium, magnesium and nutritional vitamins, in addition to glucose and fluid intolerance that happen after initiating feeding following a state of hunger or extreme malnutrition.3 The traditional electrolyte abnormality related to refeeding syndrome is hypophosphatemia, which is accountable for many of the medical penalties reported in human and veterinary sufferers.4 Refeeding a starved affected person will enhance utilization of phosphorus, potassium and magnesium to drive metabolic pathways and act as a cofactor for adenosine triphosphate (ATP) synthesis. Elevated mobile want, at the side of co-transport of potassium and magnesium into the cell with insulin-driven glucose uptake, leads to additional depletion of those electrolytes.3 Danger elements for refeeding syndrome reported in veterinary sufferers embrace sufferers with persistent malnourishment situations that lead to malabsorption of vitamins equivalent to extreme intestinal illness or pancreatic insufficiency, sufferers which have been anorexic for >7 days, and sufferers which can be overweight which have speedy weight reduction.17

Refeeding syndrome has not often been reported in veterinary sufferers. Hypophosphatemia was reported to happen between 12 and 72 hours after enteral feeding was initiated in 9 chronically malnourished cats.12 Refeeding syndrome was additionally reported in 2 cats resuscitated and fed after being trapped with out entry to meals for 7 to 12 weeks and one other cat with hepatic lipidosis fed by means of an esophageal feeding tube following a 4-week historical past of decreased urge for food and weight reduction.1,3,8,14 Previous to 2017, refeeding syndrome had solely been reported in cats within the literature. A case report in 2019 described administration of a canine with extended hunger and presumptive refeeding syndrome.14 The canine on this research developed a hypophosphatemia and hypomagnesemia on day 1 shortly after refeeding however this resolved with supplementation. The canine by no means turned medical for these abnormalities.

Sufferers susceptible to growing refeeding syndrome require important consideration, as overlooking these sufferers may cause life-threatening penalties equivalent to hemolytic anemia, cardiac failure, neurological dysfunction and respiratory failure. When these sufferers are recognized, a complete dietary plan along with a remedy plan for different co-morbidities needs to be formulated. At the moment, there are not any evidence-based research demonstrating the best refeeding technique,8 nonetheless, there have been protocols developed in folks by which veterinary medication can extrapolate from. There needs to be cautious evaluation of affected person danger for refeeding syndrome, restoration of fluid steadiness with out overloading the cardiovascular system, initiation of empirical supplementation of phosphate, potassium and magnesium (until serum concentrations of those electrolytes are elevated), initiation of thiamine and different B nutritional vitamins and hint minerals aside from iron.10 At the moment, it’s endorsed that no better than 20% of RER needs to be supplied on the primary day and dietary help needs to be elevated progressively over 4–10 days.4

The next case report describes a cat that introduced cachectic in a state of obvious hunger after lacking from its proprietor’s look after 5 months. The cat developed a extreme hypomagnesemia with medical indicators 12 days after refeeding was initiated. This report highlights the significance of a hypervigilant refeeding technique, serial electrolyte monitoring and remedy concerns in medical administration of refeeding severely malnourished cats.

Case Report

Historical past

A 2-year-old feminine spayed home short-haired cat was initially introduced to our emergency service for poor urge for food and extreme weight reduction upon returning to her house owners care after reportedly lacking for the earlier 5 months. Previous to her disappearance, the affected person was reported to be wholesome and had an acceptable Physique Situation Rating (BCS). On preliminary admission, the affected person was quiet, alert and responsive, ~8% dehydrated, cachectic and had a big flea burden. She was hypotensive on oblique blood stress measurement at 78mmHg (reference vary 120–170mmHg)5 with an preliminary physique weight of 1.49 kg. Her BCS was assessed as 1–2/9 and muscle situation rating (MCS) of 1/3. Preliminary bloodwork included a venous blood fuel, full blood rely (CBC), serum chemistry panel, and in-house FeLV/FIV check (Siemens, IDEXX Procyte Dx, IDEXX Catalyst One, IDEXX Snap FIV/FeLV Combo). These diagnostics revealed a gentle hyperlactatemia (2.34 mmol/L, reference 0.5–2 mmol/L), gentle hyperkalemia (5.24 mEq/L, reference vary 3.5–4.8 mEq/L), gentle ionized hypocalcemia (0.95 mmol/L, reference vary 1.23–1.4 mmol/L), gentle hypochloremia (108 mmol/L, reference vary 116–126 mEq/L), a normocytic, normochromic, non-regenerative anemia (Hct 19.7%, reference vary 31.7–48.0) (Desk 1). The affected person was viral unfavourable on in-house infectious display. A complete magnesium stage was not measured at preliminary presentation and an ionized magnesium stage was not obtainable on the in-house blood fuel analyzer (Siemens Speedy 500). Preliminary remedies for stabilization included an intravenous (IV) bolus of 13 mL/kg of Normosol-R with a recheck blood stress measurement post-bolus of 110mmHg. As soon as steady, the cat was positioned on crystalloid fluids (Normosol-R) at 3mL/kg/hr IV and was administered oral nitenpyram (Capstar, Elanco). The affected person was initially fed a business upkeep weight loss plan and ate with a big urge for food earlier than switch to the Intensive Care Unit (ICU) at the start of the second day of hospitalization

Desk 1 Pertinent labwork findings after refeeding was began on Day 1

Within the ICU, the affected person obtained further diagnostics and coverings beginning on the second day of hospitalization. Additional diagnostic testing included a recheck of her venous blood fuel and a complete magnesium measurement together with belly and thoracic imaging. On recheck venous blood fuel, she had a persistent hyperlactatemia with a normalized potassium stage (Desk 1). Her complete magnesium measurement was regular at 1.96 mg/dL (reference vary 1.5–3.0 mg/dL). Thoracic radiographs had been unremarkable. An belly ultrasound was carried out that confirmed hyperechoic hepatic parenchyma, gentle jejunal lymphadenopathy, and gall bladder sludge. Diagnostic assessments had been additionally submitted to the business laboratory (IDEXX Reference Laboratories) together with additional infectious testing for added underlying causes of her anemia by screening for Cytauxzoon felis, Bartonella, Anaplasma, Ehrlichia, Mycoplasma haemofelis, Mycoplasma haemominutum, Mycoplasma turicensis, Feline Leukemia and Feline Immunodeficiency Virus through polymerase chain response (PCR). Fecal testing together with giardia antigen testing and a urinalysis with tradition had been additionally submitted to the reference laboratory. In the end, outcomes didn’t reveal any underlying infectious trigger for her anemia and no intestinal parasites. Her urinalysis confirmed uncommon bacteriuria, however the urine tradition was unfavourable for progress.

Extra therapeutics added throughout the second day of hospitalization included the administration of B complicated nutritional vitamins (2 mL/L, VetOne), thiamine (25 mg SQ each 24 hours, VetOne), Cerenia (1 mg/kg IV each 24 hours, Zoetis), pantoprazole (1 mg/kg IV q24 hours, Pfizer), Unasyn (40 mg/kg IV each 8 hour, Pfizer), praziquantel/pyrantel pamoate (Drontal, Bayer) per os as soon as with the dose repeated in three weeks.

The affected person was fed a considerable amount of a business weight loss plan as soon as at consumption by means of the emergency service (referenced as day 1 of feeding). Additional feedings had been initially withheld till a vitamin plan was formulated and deliberate dietary consumption was began on the second day of hospitalization at 25% of the sufferers calculated resting power requirement (RER). A weight loss plan of Emeraid Intensive Care HDN (EmerAidVet) was provided for refeeding each 6 hours and the affected person ate with a ravenous urge for food. Diet was elevated every day by 25% till reaching 100% calculated RER on the fifth day of hospitalization/refeeding.

The affected person was hospitalized for a complete of 5 days. Whereas hospitalized, serial electrolyte ranges had been monitored each 6 to 12 hours with every day chemistry bloodwork. In a single day throughout the second day of hospitalization, the affected person developed a gentle hypokalemia and potassium chloride supplementation (Hospira) at 20meq/L was added to her crystalloid fluids. This progressed by means of day 4 of hospitalization warranting a rise in parenteral potassium supplementation to 60meq/L crystalloid fluids IV. She was began on oral potassium gluconate supplementation (RenaPlus, VetOne) on the fourth day of hospitalization at 1.6meq PO each 8 hours and her parenteral supplementation was weaned. She was progressively anemic on the fifth day of hospitalization warranting a packed purple blood cell transfusion (pRBC, Blood Kind A) at a dose of 15mL/kg IV. The proprietor elected discharge from the ICU on the fifth day of hospitalization provided that the affected person was steady following transfusion. The affected person was discharged from the hospital with amoxicillin-Clavulanate (Zoetis) and potassium gluconate at 1.6meq PO q12 hours (RenaPlus, VetOne). A vitamin plan was formulated for the proprietor to proceed at not more than 100% calculated RER with a Hill’s m/d weight loss plan. On the time of discharge, the affected person’s weight was 1.5kg.

The affected person introduced for a recheck on day 9 following preliminary presentation/refeeding and was reported to be doing properly at dwelling with the proprietor adhering to the feeding and medicine plan. The affected person was steady on bodily examination and her weight was 1.65kg. Recheck labwork was carried out and confirmed a steady potassium and hematocrit with a continued regular phosphorous stage (Desk 1). A complete magnesium stage was not carried out because of lack of pattern and affected person temperament. Given the sufferers medical enhancements and steady bloodwork 9 days following refeeding, the proprietor was instructed to extend feedings to 1.2 instances the calculated RER. Oral potassium gluconate supplementation was continued as prescribed, and antibiotics had been discontinued given unfavourable urine tradition outcomes. The proprietor was instructed to recheck in a single week or sooner with issues.

Scientific Findings

Twelve days following refeeding and preliminary hospitalization, the affected person introduced by means of the Emergency service for acute anorexia, vomiting, panting, generalized tremors, and a tonic-clonic seizure. In-house venous blood fuel, CBC and chemistry had been carried out (Siemens Speedy 500, Procyte dx, Catalyst One) revealed a markedly low complete magnesium stage (<0.5 mg/dL, reference vary 1.9–2.6 mg/dL) in addition to low-normal potassium (3.5 mEq/L, reference vary 3.504.8 mEq/L) (Desk 2). Her weight at presentation was 1.6kg. Emergent therapeutics included administration of midazolam 0.5 mg/kg IV (Almaject) pending labwork and a magnesium sulfate (Fresenius USA) steady charge infusion (CRI) at 1 mEq/kg/day IV in addition to one oral dose of magnesium hydroxide (320 mg PO, Phillips Milk of Magnesia) as soon as the affected person mentation may help oral remedy administration. Steady telemetry monitoring was began and the affected person maintained a standard sinus rhythm all through hospitalization. The medical indicators of tremoring resolved with supplementation of magnesium as described above. The magnesium sulfate CRI led to normalization of complete magnesium ranges inside 9 hours following initiation of remedy (see Desk 2). Extra remedies for the affected person included potassium supplementation intravenously at 30meq/L of crystalloid fluids (Normosol-R). On the thirteenth day following preliminary refeeding, the affected person was discovered to be severely anemic once more and obtained a second pRBC transfusion (Blood kind A, 15mL/kg IV dose administered over 4 hours). Given her steady magnesium ranges, she was began again on enteral vitamin at 25% of calculated RER. The magnesium sulfate CRI was tapered and discontinued on day 14 following preliminary refeeding given regular complete magnesium ranges (Desk 2). On day 15 following preliminary refeeding, she was steady however her complete magnesium ranges had decreased so she was began on oral supplementation with magnesium hydroxide (Phillips Milk of Magnesia, Bayer 240 mg PO q12 hours) which stabilized then elevated her complete magnesium ranges resulting in the discontinuation of oral remedy by day 16 (Desk 2). Her dietary supplementation was elevated from 25% to 100% RER by day 15 and she or he was once more consuming with a ravenous urge for food. She was discharged from the hospital on day 16 following preliminary refeeding with a plan for outpatient monitoring and coverings. Her physique weight was 1.62kg on the time of discharge and the one remedy that she required was oral potassium gluconate (RenaPlus, VetOne) supplementation at a dose of 0.8meq PO q12 hours. The proprietor was instructed to proceed to solely feed the Hill’s m/d weight loss plan at 100% of calculated RER per day.

Desk 2 Lab work findings throughout second hospitalization and rechecks following discharge

The affected person introduced for a recheck examination 18 days following preliminary refeeding and hospitalization. She was doing properly with no issues expressed by the proprietor excluding a single episode of obvious melena. The proprietor was adhering to the strict dietary pointers established and famous that the affected person was consuming with a ravenous urge for food. Recheck labwork confirmed a progressive complete hypomagnesaemia (0.94mg/dL, reference vary 1.9–2.6 mg/dL) with none of the beforehand famous medical indicators (Desk 2). She was handled as an outpatient with sucralfate (Par Prescribed drugs 100mg PO q8 hours) for the obvious melena in addition to magnesium hydroxide (Phillips Milk of Magnesia 3mL (240 mg) PO q12 hours. On subsequent rechecks, the affected person’s complete magnesium ranges had been steady on oral remedy and the melena had improved to resolve in keeping with the proprietor. Her vitamin plan was adjusted to permit her 1.2x calculate RER. Her oral magnesium hydroxide dose was slowly tapered and was discontinued 30 days following preliminary refeeding as was her potassium supplementation. Her weight at that recheck was 2.03kg (day 30) and she or he was reported to be doing properly by the proprietor however continued to behave ravenous whereas consuming at dwelling. Her feedings had been elevated to 1.8xRER at the moment. On recheck analysis 32 days following preliminary refeeding, the proprietor reported a brand new onset diarrhea and recurrent melena. Recheck labwork at the moment confirmed progressively hypokalemia (2.7 mEq/L, reference vary 3.5–4.8 mEq/L) and gentle complete hypomagnesemia (1.43 mg/dL reference vary 1.9–2.6 mg/dL) (Desk 2). The affected person was began again on potassium supplementation(RenaPlus, VetOne, at 0.8meq PO each 12 hours), magnesium hydroxide 80 mg PO q12 (Philips Milk of Magnesia, Bayer) at 80 mg PO q12 hours), metronidazole (MixLab compounding pharmacy) and sucralfate (Par pharmaceutical) Given the persistence of her obvious hypomagnesemia and gastrointestinal indicators, she had a gastrointestinal malabsorption blood panel (Texas Agricultural and Mechanical College to measure serum B12, folate, TLI and PLI in addition to a repeated belly ultrasound. She was discovered to be mildly hyperfolatemic (30.6 mcg/L, reference vary 9.7–21.6 mcg/L) and on repeated ultrasound she had a brand new multifocal small intestinal useful ileus with decision of the hyperechoic hepatic parenchyma and jejunal lymphadenopathy. On subsequent recheck examinations, the affected person was discontinued from oral potassium gluconate supplementation 51 days following preliminary refeeding and hospitalization. The final recheck carried out on the affected person was 55 days post-initial refeeding at which period her magnesium ranges had remained steady on supplementation (Desk 2). Her weight at that recheck was 2.68kg. Additional dose changes weren’t pursued at the moment as a result of the proprietor was transferring out of state. Seventy-five days following preliminary hospitalization, a recheck by means of a brand new veterinary supplier revealed a standard magnesium stage so her oral magnesium supplementation began one other taper. Additional communication with the proprietor revealed that the affected person was efficiently tapered off of oral magnesium supplementation and is clinically wholesome. The affected person obtained the most effective apply of veterinary care and all diagnostics and coverings carried out had been consented by the house owners.


To our data, that is the primary case report describing hypomagnesemia as the first electrolyte disturbance attributed to refeeding syndrome in a cat following extended hunger in addition to an obvious delay in onset of medical indicators suitable with hypomagnesemia. The electrolyte derangements attribute of refeeding syndrome are normally clinically obvious inside two to 5 days following initiation of feeding with medical penalties not suspected better than 10 days following feeding.1,4,10 This affected person developed a gentle, complete hypomagnesemia on the fifth day following refeeding with out medical indicators and solely a gentle hypokalemia, which stabilized on oral potassium supplementation. She developed anorexia, vomiting, generalized tremors and seizure exercise on the twelfth day following initiation of refeeding and consumption to our hospital. These medical indicators had been attributed to complete physique magnesium depletion as famous by the markedly low complete magnesium ranges on in-house bloodwork. The medical indicators of her hypomagnesemia improved with each parenteral and enteral supplementation resulting in the termination of her medical indicators. This affected person was serially monitored and required long-term electrolyte supplementation with out one other potential reason behind her hypomagnesemia. This affected person responded properly to remedy and has recovered utterly and has not required everlasting supplementation of magnesium.

The hypomagnesemia on this affected person is in keeping with refeeding a starved or malnourished affected person. The pathophysiology of hunger may be divided into an acute response (occurring inside the first 2 weeks of hunger) and delayed response (occurring 10 days after the onset of hunger). Within the acute section of hunger, there are metabolic alterations that happen equivalent to decreases in insulin and triiodothyronine (T3) and will increase in glucagon, progress hormone, catecholamines and plasma cortisol. The top results of these hormonal alterations is enhanced by hepatic glycogenolysis, gluconeogenesis and skeletal muscle proteolysis thereby facilitating lipolysis. The mind is surviving on glucose generated from protein catabolism and gluconeogenesis within the liver. Throughout the delayed response to hunger there’s a main shift from utilizing carbohydrate to utilizing fats as the primary power supply. Gluconeogenesis is decreased throughout this era and protein catabolism is minimized. Ketone our bodies from hepatic oxidation of fatty acids are utilized by many of the tissues for power. At this stage, the mind is reliant on ketone our bodies as an power substrate.17 Throughout hunger, depletion of electrolytes happens from lack of dietary consumption with further electrolyte losses from the catabolism of fats and muscle.1 Throughout refeeding, consumption of carbohydrate stimulates insulin launch, leading to conversion from a catabolic to an anabolic state, which will increase mobile demand for phosphorus, potassium and water. Newly synthesized cells require potassium for upkeep {of electrical} gradients and translocate serum potassium intracellularly. Glycolysis and protein synthesis resume following refeeding which require the mobile uptake of phosphorus and magnesium. The insulin launched throughout refeeding will increase mobile actions thus rising the mobile requirement for magnesium.17

Hypophosphatemia is the first electrolyte abnormality attribute of refeeding syndrome.4,14,16 Hypophosphatemia has been a distinguished characteristic of refeeding syndrome in all beforehand reported feline instances and was typically related to hemolysis.1,3,8,14 Our affected person didn’t develop a hypophosphatemia on bloodwork all through any of her evaluations, however her main electrolyte abnormality was a complete hypomagnesemia. Hypomagnesemia is a variable discovering in sufferers with refeeding syndrome.3,14 In a earlier research, low serum complete magnesium was solely detected in one of many cats reported with refeeding syndrome however was not measured in each case.1,3,8,14 Hypomagnesemia developed on day 3 and improved to a low-normal worth with supplementation. The mechanism for hypomagnesemia in refeeding syndrome isn’t clear and is probably going multifactorial, ensuing from intracellular motion of magnesium ions into cells with carbohydrate feeding and poor dietary consumption of magnesium.7 Upregulation of carbohydrate metabolism may clarify the elevated demand for magnesium and thiamine, which then results in neurological and neuromuscular problems.5 Many instances of hypomagnesemia don’t seem clinically important, however extreme hypomagnesemia can lead to medical problems, a few of which had been famous on this affected person.7 Extreme hypomagnesemia can lead to cardiac dysrhythmias, gastrointestinal ileus/belly discomfort, anorexia and neuromuscular options equivalent to tremors, paresthesia, tetany, seizures, irritability, confusion, weak spot and ataxia.7 Our affected person introduced with vomiting, weak spot, generalized tremors and a tonic-clonic seizure on day 12 following preliminary refeeding.

Whole physique magnesium focus is affected by dietary consumption, gastrointestinal operate, hormonal steadiness, redistribution of the magnesium cation, and excretion into a 3rd physique house or urine.12 A considerable amount of magnesium is absorbed within the small gut and gastrointestinal illness (inflammatory bowel illnesses, malabsorptive syndromes) can result in a hypomagnesemia.11 This affected person was screened for an underlying enteropathy by means of serial ultrasound examinations and thru a malabsorption panel (accomplished by means of Texas Agricultural and Mechanical College) with out convincing proof for an enteropathy and she or he was prophylactically handled for intestinal parasites and fecal unfavourable. Her renal operate remained satisfactory all through hospitalization making renal losses of magnesium much less possible. An underlying reason behind hypomagnesemia was not recognized on this affected person; subsequently, her hypomagnesemia was attributed solely to refeeding syndrome. The affected person on this case report had persistent, gentle hypokalemia and ionized hypocalcemia. All studies of cats with refeeding syndrome had documented hypokalemia14 Magnesium is a crucial mediator of each hypocalcemia and refractory hypokalemia.1 Low magnesium impairs potassium reuptake within the nephron leading to extra losses and may impair the mobile transport of potassium all by means of the affect on magnesium-dependent enzymes such because the Na-Okay-ATPase.2,15 The hypokalemia secondary to hypomagnesemia could also be refractory to parenteral potassium supplementation however is usually responsive as soon as magnesium is corrected.9 Whereas our affected person was initially hypokalemic beginning the second day following refeeding, she stabilized with potassium supplementation alone and remained steady on oral potassium supplementation at a recheck 9 days following refeeding. Magnesium deficiency may result in refractory hypocalcemia. Roughly one-third of human sufferers with low serum magnesium could concurrently have low serum calcium.11 Elements contributing to this embrace impaired launch of parathyroid hormone, diminished parathyroid hormone synthesis, and skeletal resistance to the motion of parathyroid hormone, all ensuing from impaired magnesium-dependent adenylate cyclase operate.9 The cat on this report had a gentle ionized hypocalcemia which by no means required supplementation.  

The affected person on this research developed diarrhea 12 days after refeeding throughout her emergency presentation for extreme hypomagnesemia. Diarrhea can develop solely from low magnesium, nonetheless this occurred shortly after remedy with parenteral magnesium sulfate and continued intermittently within the affected person historical past when magnesium ranges had improved. Whereas diarrhea is a recognized opposed impact of oral magnesium hydroxide,16 it has not been famous as an impact of parenteral magnesium sulfate. The affected person’s diarrhea could have initially developed because of hypovolemic shock or a results of enterocyte-damage from a useful ileus because of her hypomagnesemia.9,11 On recheck belly ultrasound, a useful ileus was famous on this affected person. Hypomagnesemia has been reported in horses after colic surgical procedure, suggesting a possible causal relationship between the hypomagnesemia and strangulating lesions and ileus of the bowel.11 Hunger is thought to result in discount in enterocyte formation and nutrient absorption. Intestine atrophy with decreased crypt cell proliferation, decreased villous peak, intestinal mass discount, thickening and coarsening of the intestinal mucosal folds, decreased gastric acidity, decreased gastric and intestinal motility are additionally famous in sufferers which have been starved.17 Diarrhea happens in these starved sufferers because of impaired absorptive capability, bacterial overgrowth, presence of unconjugated bile salts, hypoalbuminemia and intestine edema.3,17 Whereas hunger is a possible mechanism, given the timing of the onset of diarrhea (12 days following refeeding), this isn’t suspected for our affected person. Along with diarrhea, this affected person additionally developed melena, in keeping with GI bleeding. Her melena improved with gastrointestinal protectants (sucralfate). A part of this affected person’s anemia was attributed to melena later in her care, however, initially, her anemia was attributed to her heavy flea burden and from the necessity for survey phlebotomy for monitoring her electrolytes. She required two pRBC transfusions all through the period of her care.

This affected person was fed unrestricted as soon as at preliminary presentation (day 1) and ate with a big urge for food. Additional feedings had been withheld following the understanding for dietary restriction given her medical image. Her dietary administration for refeeding syndrome was structured beginning on the second day of her preliminary hospitalization at 25% calculated RER and progressively elevated to 100% RER over the course of 4 days. Refeeding syndrome has been reported in a cat began a 6 Kcal/kg/day.1,4 In people, the NICE pointers suggest refeeding ought to start at a most of 5 kcal/kg/day in severely malnourished sufferers.6 In our case, a extra conservative plan for the affected person’s preliminary dietary supplementation may have been applied with a slower enhance in supplemented vitamin. In people, the NICE Pointers (Nationwide Institute for Well being and Care Excellence) establish danger elements and suggestions for refeeding in malnourished sufferers. In these pointers, preliminary refeeding shouldn’t exceed 20 kcal/kg/day or not more than 20% RER on the primary day. These pointers additionally suggest that <50% RER complete needs to be fed throughout the first 3 days. Dietary help needs to be elevated progressively over 4 to 10 days. Nonetheless, regardless of these suggestions, there isn't a common advice of how rapidly to advance the dietary routine, notably in veterinary medication. This research highlights {that a} cautious strategy to vitamin needs to be practiced in feline sufferers.

Dietary methods in starved sufferers ought to include a low stage of digestible (soluble) carbohydrates, include excessive fats and protein content material, and satisfactory electrolytes. This affected person was fed Emeraid Intensive Care HDN (EmerAidVet). This method is suitable as it’s excessive in crude protein (8.61 grams/100 kcals), crude fats (6.05 grams/100 kcals) and accommodates satisfactory electrolytes, nutritional vitamins and minerals that exceed the Nationwide Analysis Council pointers. It is strongly recommended to supply essentially the most energy as fats and protein as a result of carbohydrates stimulate insulin launch and will lead to extra extreme metabolic derangement.8 Consequently, when a weight loss plan used for refeeding consists of a excessive proportion of carbohydrate, the cessation of natriuresis is abrupt and may result in the event of peripheral edema and fluid overload. Refeeding with fats or protein alone will enable for natriuresis to proceed and will forestall fluid overload or edema formation from occurring in these sufferers.17 In veterinary medication, if refeeding syndrome is suspected then it’s endorsed to cease refeeding instantly and aggressively deal with electrolyte abnormalities.17 The refeeding dietary method may also be adjusted to include a decrease quantity of carbohydrate. There needs to be no try to attain weight achieve throughout the first week of remedy and any weight achieve that does happen needs to be thought-about to be because of fluid retention relatively than addition of lean physique mass.17 Not all starved sufferers who’re refed develop refeeding syndrome. You will need to concentrate on the situation and anticipate issues to assist decrease its prevalence. You will need to intently monitor at-risk sufferers, particularly their important features, fluid steadiness and electrolytes.7

Previous to refeeding, the affected person ought to have full bloodwork and any electrolyte abnormalities needs to be corrected previous to initiation of dietary help. Electrolyte traits needs to be evaluated a number of instances per day relying on the affected person. If electrolyte values will not be rising, it could be essential to gradual or cease vitamin utterly till they’re improved. Excessive danger sufferers needs to be empirically supplemented for the primary 24 hours of remedy. Earlier than initiating feeding, thiamine must also be administered and adopted by every day injections till day 3 of remedy. Moreover, the affected person’s physique weight and urine output needs to be monitored for fluid overload. A PCV/TS must also be carried out to judge for presence of hemolysis. The affected person’s cardiovascular and respiratory operate must be monitored. This may be finished utilizing telemetry and inserting the affected person on a respiratory watch. Serial neurological exams must also be carried out as electrolyte and thiamine deficiencies may cause neurological indicators in these sufferers.

A serious limitation on this case report is the measurement of serum magnesium, which has been reported as complete serum magnesium right here relatively than an ionized magnesium stage. Magnesium measurements in veterinary sufferers are sometimes restricted by the supply and skill of point-of-care monitoring for ionized magnesium ranges. Ionized magnesium is the popular measurement to complete magnesium as it’s the physiological energetic type in serum.2,11 Extreme complete physique magnesium depletion could exist within the face of regular serum magnesium concentration13 and will have been the case early within the care in our affected person. Measurement of low complete serum magnesium ranges means that the intracellular magnesium steadiness has been disturbed and implies a average to extreme complete physique magnesium deficiency.13 The whole hypomagnesemia measured in our affected person possible represents complete physique depletion given her medical indicators, however these ranges could have been detected sooner with the supply of ionized magnesium measurement. The true incidence of hypomagnesemia in refeeding syndrome in veterinary medication is unknown; nonetheless, it’s possible greater than urged by the intermittent case studies and small case collection.1,3,12

In conclusion, this case demonstrates a delayed, extreme, and protracted life-threatening hypomagnesemia with medical indicators in a affected person within the absence of different extreme electrolyte abnormalities attributed to refeeding syndrome. This affected person demonstrated a delay within the severity of her electrolyte abnormalities with persistent deficiencies warranting persistent supplementation. This case illustrates the need of magnesium measurement no matter different electrolyte alterations, most notably within the absence of a hypophosphatemia, and descriptions the necessity for magnesium supplementation within the acute and persistent setting. This case report additionally offers an outline of the suitable medical indicators noticed in a feline affected person with hypomagnesemia.


The authors report no conflicts of curiosity on this work.


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