Outrageous marketing at the CAPHC meeting, selling out for a free lunch.

I was going to write a short post about my presentation at the meeting of the Canadian Association of Pediatric Health Centers (CAPHC) in Quebec city.  I was asked by the organizers to talk about how variations in practice affect patient safety. So I put together what I think was a great panel, with myself, Sophie Gravel, our NICU co-ordinator also a mother of a preterm infant and a breast-feeding advocate, and Barbara Farlow, an active member of Patient Safety Canada and a mother of a girl (who had trisomy 13) who died in hospital at a few weeks of age.

I think the panel went well, we had a good attendance and good comments, and I certainly learned a great deal from my co-presenters. The symposium was sponsored by Mallinckrodt, who are now the company responsible for selling and marketing inhaled NO. Which is not the subject I am referring to in the title of this post. Mallinckrodt had no input into the subject of the symposium, or its content, and I did not mention nitric oxide in my talk (even though use of iNO in the preterm is great example of what I was discussing, variations in practice!) It was, I think a good example of a non-directed educational contribution from a pharmaceutical/medical supplies company. (Even though I still feel uncomfortable accepting my expenses and honorarium from “pharma”. My honorarium will be donated to my research funds).

What stunned and outraged me was what I found in the materials I received when I registered for the meeting.

At noon today there is a talk on using exclusive human milk feeds for preterm infants, sponsored by the only company who supplies human milk-based formula and fortifier for preterm infants.

This is outrageous.

CAPHC should be ashamed.

This breaks all the rules that they should be abiding by,

It is an immoral sell-out.

The organisation, which has a mission “to improve health service delivery for Canadian children and youth”, has sold out so that its members can get a free lunch.

Alan Lucas, whose research has been important in improving care of preterm infants, has been flown in from London to give some sort of credibility for this symposium. Apparently he is going to discuss the proven benefits of an exclusive human milk based diet in preterm infants. Which should take him about 3 minutes.

To recap, for those who have not been memorizing my blog posts for the last few years.

Prolacta, for it is they of whom I speak, have sponsored 2 trials in preterm infants (500 to 1250 g birth weight). One modestly sized study of infants whose mothers were planning to breast feed (n=207), another very small trial for infants whose mothers could not or did not plan to (n=53). The studies were registered as a single trial, but reported as 2 trials (which I think is OK for these trials, there was no real overlap either in the interventions or in the patients) the trial in formula fed babies was blinded, the other was not. The primary outcome for the trials was duration of Parenteral Nutrition: the formula trial showed a reduction in TPN duration, the other did not. The initial study reports show trials that are pretty reasonable quality, apart from the very small size of the formula trial. Unfortunately there have been 3 publications of post-hoc secondary analyses of the trials, as the company try to squeeze more significant data from the results.

Prolacta make a great deal out of the fact that the rate of NEC in the control groups in the 2 studies was very high (21% in the formula trial controls, 16% in the breast fed trial controls, who got cows’ milk based fortifier or cows’ milk based formula if they ran out of mother’s milk).

That isn’t of course how the company promotes their milk. They promote it as showing a significant reduction in NEC. In fact if you do the statistics yourself, the trial that was entitled “An Exclusively Human Milk-Based Diet Is Associated with a Lower Rate of Necrotizing Enterocolitis….” actually shows a difference in NEC (which was a secondary outcome and should not have been in the title) which is only significant if you put the 2 human milk groups together.

As I said, before I got a bit side-tracked, discussing the results of the one (or maybe two) trials should not take Dr Lucas very long.  If Dr Lucas was a Canadian Physician he would in fact be in breach of the CMA guidelines which clearly state the following:

Physicians should not engage in peer selling. Peer selling occurs when a pharmaceutical or medical device manufacturer or service provider engages a physician to conduct a seminar or similar event that focuses on its own products and is designed to enhance the sale of those products. This also applies to third party contracting on behalf of industry. This form of participation would reasonably be seen as being in contravention of the CMA’s Code of Ethics, which prohibits endorsement of a specific product.

CAPHC you should be ashamed. You must also change your practices, we can have no respect for an organization prepared to allow this sort of seminar as part of its meetings.

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Early steroids to prevent Chronic Lung Disease; give them directly into the lungs?

Bassler D, et al. Early Inhaled Budesonide for the Prevention of Bronchopulmonary Dysplasia. New England Journal of Medicine. 2015;373(16):1497-506. One of those ongoing trials that we have been awaiting the results of has just been published. The NEUROSIS trial was a randomized controlled trial with a very respectable sample size, 863 infants less than 28 weeks, by far the largest investigating this issue. Babies got budesonide (or placebo) twice a day by a metered dose inhaler with an aerochamber until they were 14 days of age then once a day until they were 32 weeks or off oxygen.

The results showed a reduction in the primary outcome, (death or oxygen requirement at 36 weeks) with the inhaled steroids. There were no clinical complications that were substantially different between groups. Mortality was numerically higher in the budesonide group, 16.9% compared to 13. 6%, and BPD was much lower, 27.8 vs 38%.

There were similar reductions in the primary outcome in the most immature stratum, as well as in the more mature babies. The 2 components of the primary outcome changed in different directions, as you can see from the numbers above. What I don’t understand is why this difference in mortality is referred to as a ‘borderline significant between-group difference in the rate of death’ the 95% confidence intervals are far from from suggesting a difference between the groups, the relative risk of death, with 95% confidence lies between 0.91 to 1.69.

I think this study was performed to the highest standards, and the presentation of the results is appropriately conservative. Maybe too much emphasis is placed on the no-where-near significant increase in mortality, but the long term clinical significance of oxygen requirement at 36 weeks of age is also quite questionable.

Some animal models show adverse effects of steroids on lung growth, even though the steroids reduce pulmonary inflammation. So a reduction in the proportion of babies needing oxygen at 36 weeks does not necessarily mean that long term pulmonary health will be improved. Indeed the studies of dexamethasone as treatment for BPD, despite a reduction in the diagnosis of BPD (because short-term improvements in gas exchange lead to fewer babies needing oxygen at 36 weeks), do not show any improvement in longer term pulmonary health.

We need to rethink how we do studies such as this, it could be considered a positive study, as the primary outcome was improved, or a null study, because the more important outcome, death, was not different between groups. What we really need now is to know if those babies who got the steroids have better pulmonary health in the first years of life, or not. And also, of course, whether their neurological and cognitive development has been affected.

A systematic review of similar studies with data on mortality may help to clarify if that difference is just a fluke, or part of a wider pattern.

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At least they weren’t worse off.

Fever is a frequent response to infection. The inflammatory response to invading organisms often leads to a febrile reaction, which many have suggested is an adaptive response, that might actually have an evolutionary advantage, and improve survival from serious infections. Of course it is also possible that it is an epiphenomenon, without survival impacts, or that it had a minor effect in the past, but not compared to ICU and antibiotics.

In countries with high resources, death from sepsis is rare, outside of intensive care units. So this study (Young P, et al. Acetaminophen for Fever in Critically Ill Patients with Suspected Infection. The New England journal of medicine. 2015.) recruited the kind of patients where an effect of fever, and any potential adverse effect of using antipyretics, would be evident.

Basically they found nothing.

There was no adverse or beneficial effect of treating fever with acetaminophen (paracetamol for the europeans) on any of the outcomes in this large multi-center trial of 700 critically ill adults in Australian and new Zealand ICUs. Either the primary outcome “ICU-free days” or the secondary outcomes.

Like anything else it might be different in children or newborns, but there wasn’t even the hint of an effect. Which means, I think that we don’t need to worry too much about giving acetaminophen to febrile babies or our own children. If it makes them feel better, then go ahead.

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New Publication from the Sainte Justine team

We have just published a new article : The first author Marianne Lapointe is our senior NNP who has been heavily involved in improving nutritional standards in our NICU. She was a leader in developing our enhanced enteral feeding protocols, in installing them in actual practice, and in performing this research project. Félicitations Marianne. Also to Melissa Savaria who is an RN and lactation consultant in our NICU, who has worked diligently with mothers to maintain and improve our high breast-feeding rates. as for the two other authors, you will recognize their names.

Lapointe M, Barrington K, Savaria M, Janvier A. Preventing Postnatal Growth Restriction in Infants with Birth Weight less than 1300 grams. Acta Paediatrica. 2015.

I have mentioned the study before, it is a comparison of 2 historical cohorts, before and after we changed our nutritional protocols. This is the abstract:

Results

There were 153 infants in cohort 1 and 118 in cohort 2. 19% were growth restricted at birth in both cohorts. Feeds advanced more quickly in cohort 2, with decreased duration of central lines and TPN; breast milk fortification occurred sooner. Calorie and protein intakes were increased during all of the first 14 days of life. Adverse clinical outcomes were unchanged, including NEC. The proportion of infants discharged < 10th percentile of expected weight, decreased from 23% to 9%. In cohort 2, the z-score for body weight decreased by 0.39, compared to an average 1.03 in cohort 1 (p<0.001). Head circumference and body weight were also significantly improved at discharge (p<0.01), but length was improved to a lesser degree.

Conclusion

Early and enhanced postnatal intravenous and enteral feeding can provide good postnatal growth among very immature infants without adverse effects. Calorie and, particularly, protein intake in early life could probably be further optimized

What can we do better? There is now reasonably good evidence that we should be targeting 4 g/kg/day of protein intake in the small preterm. This should improve linear growth, and hopefully normalize body composition. Our latest update of the nutrition protocol increases protein by aiming for higher volumes of breast milk with standard fortification, or increased fortification if the volume is not tolerated.

Another observational study supports the need to reduce and prevent post-natal growth restriction Pampanini V, et al. Preterm infants with severe extrauterine growth retardation (EUGR) are at high risk of growth impairment during childhood. Eur J Pediatr. 2015;174(1):33-41. The title basically says it all, as a good title should (you should still read the article to see if the title is accurate!)

 

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Respire bébé, respire

Annie Janvier vient de publier un livre. C’est l’histoire de notre fille, et des histoires d’autres familles qu’Annie a rencontré et soigné, et les choses qu’elle a appris de ces familles.

C’est un livre publié pour les familles, les soignants, et tout le monde qui s’intéresse à la question humaine.

Il est publié par Québec Amérique, la plus grande maison d’édition du Québec, qui écrit qu’il est :

un ouvrage percutant, baigné d’humour autant que de larmes

cliquer ici pour leur déscription complète.

et il est disponible:

Directement de Québec Amérique

Dans les magasins de Renaud-Bray et aussi, évidemment, Archambault, Indigo etc.

En version éléctronique: epub, pdf et kindle.

And soon in English!

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What if 5 were the magic number?

Our weeks are made of 7 days. An entirely arbitrary unit of measurement, based on an idea that 7 is magical, so there are 7 continents, 7 seas, 7 days of the week. Or maybe because you can easily divide a lunar month by 4, in fact it isn’t totally clear why there are 7 days in a week. It is hidden in the mists of time, the majority of human cultures use the 7 day week. But what if it had been 5? What if the Aztec system of 20 day periods, divided into 5 day weeks, had taken over?

2 day weekends and 3 days of work sounds like fun. Of course the duration of a pregnancy in Aztec land would be 56 five-day weeks, and then what we now refer to as 25 weeks gestation would become 35 five-day Aztec weeks. Neonatal survival becomes less and less likely as we descend to 34 Aztec weeks, or 33, and so on. But imagine if you were in an Aztec country,and the local paediatric society had recommended that “33 weekers” were not viable, because survival is too low, or impairment is to high (actually they don’t ever explicitly say why 33 weekers should not get active care) . Imagine if you were denied active intervention because you were only at “33 weeks” and 4 days, and told to go away until you hit 34 weeks. You could maybe just fly to Canada to find that you were suddenly viable, as you were 24 weeks and 1 day in 7-day weeks.

You could be forgiven for being a bit angry about your local paediatric society’s guidelines, especially when you realize that your ultrasound performed at 16 Aztec weeks was only accurate to within about one 5-day week, 95% of the time.

I’ve been thinking about this recently. Especially after the publication of the NICHD network data on active treatment, and how it changes by weeks of gestational age. One of the graphs from that publication shows that active intervention at 22 and 23 weeks stays relatively unchanged as a proportion of deliveries until just before the end of the week.

GA and resuscitation

Which is odd, but I think easy to understand. We have become used to thinking of babies in terms of whole numbers of weeks of gestation. So a baby of 23 0/7 is thought of as being the same as 23 5/7. But once the baby is within 48 hours of the next big number, at which point they may have had steroids because of crazy hospital policies, based on 7 being the magical number, our attitudes start to change. I would be fascinated to know when the mothers got their steroids, and if that is really the cause of the jump up in intervention rates.

I would also be fascinated to see what the pattern would be in Aztec land.

One other thing that I think this shows, is that shared decision-making is currently a sham. Surely if mothers were adequately informed, and truly participated in the decisions, rather than having them imposed by physicians or by hospital practice, then there would be a progressive gradual increase in intervention as gestational age advanced. Mothers would have no reason for suddenly deciding at 23 weeks and 5 days that their baby should have active intervention.

I am sure that the physicians who resuscitate 100% of the babies at 22 weeks, and those that resuscitate none of them, all think they practice shared decision-making. But clearly if there are no babies being resuscitated, (once there are significant numbers of mothers in the data) then the values of the physicians and the care team are being imposed on the families. If the decision was truly shared, then there would be at least a few who occasionally received active intervention.

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PPIs are toxic

PPIs could mean “public-private initiatives” which are highly toxic, as recent experience in the UK and in Quebec has shown, but in this case I mean proton pump inhibitors.

Stark CM, Nylund CM. Side Effects and Complications of Proton Pump Inhibitors: A Pediatric Perspective. The Journal of pediatrics. 2015. This excellent and complete review of PPI toxicities has just been published.

Many people seem to think they are safe, and there has been an explosion in their use in the newborn, with practically no supportive data.

PPIs increase :

GI infections (including clostridia)

Upper respiratory infections

Lower respiratory infections

Spontaneous Peritonitis

Coeliac Disease

Gastric Fundal Polyps

Malabsorption of calcium

Malabsorption of magnesium

Probably malabsorption of iron and some vitamins

Acute interstitial nephritis

and, of course, Necrotising Enterocolitis.

 

You should really have good evidence that gastric acid secretion is causing your baby’s problems before prescribing these toxins.

 

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Holland is changing

A new article from the Groningen group, plus Annie Janvier. Koper JF, et al. Dutch neonatologists have adopted a more interventionist approach to neonatal care. Acta Paediatr. 2015;104(9):888-93. It documents changes in their delivery room and NICU in end-of life practices between two periods 2001-2003 and 2008-2010.

Even with the “more interventionist approach” they only had 1 baby under 25 weeks admitted to the NICU in the later cohort (who died). So they were still, in that period, not offering intervention under 25 weeks.

I wanted to highlight however their table 2: which looks like this, the first column of numbers is the first cohort, and the proportion of the 126 deaths which occurred in each situation. The second column is the 113 babies in the second cohort. The asterisks denote statistical “significance”.

Stillbirth, dead on arrival to the hospital 44 (35%) 37 (33%)
Stillbirth, withholding surgical intervention 29 (23%) 17 (15%)
TOP, congenital malformation  22 (17%) 33 (29%)*
Induction for risk of extreme preterm birth 1(1%) 7 (6%)
Withholding resuscitation (comfort care) 25 (20%) 13 (12%) **

It is basically the table I included in my presentation at the last PAS meeting, and shows a lot more information than just the NICU admission data. The increase in termination of pregnancy (TOP) is probably related to changes in ultrasounds during pregnancy, ultrasound with screening for malformations was introduced as standard practice in Holland between the cohorts, and there was therefore an increase in antenatal diagnosis. This may also partly be the reason for the reduction in comfort care, as there would likely be fewer surprise diagnoses of serious malformations in the delivery room. The decrease in deaths due to “withholding surgical intervention” (which basically means not doing a Cesarean) is probably truly a willingness to intervene more actively for babies.

I think it is important that neonatal survival data are presented with this amount of detail. Otherwise a change in mortality among NICU admissions is difficult to interpret, and comparisons between groups of patients becomes meaningless.

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Prebiotics, Probiotics and the microbiome

A series of interesting recent articles:

Yang J, et al. Application of Laser Capture Microdissection and 16S rRNA Gene Polymerase Chain Reaction in the Analysis of Bacteria Colonizing the Intestinal Tissue of Neonates With Necrotizing Enterocolitis. Pediatr Infect Dis J. 2015;34(10):e279-89. These investigators examined intestinal samples resected during NEC surgery. Some controls with intestinal atresia were also studied. They were able to examine bacteria specifically related to the NEC tissue samples. They found several groups of bugs that were not present in the controls. Enterococcus sp. and Escherichia sp. were frequently found in both infants with NEC and controls, whereas Pseudomonas sp., Klebsiella sp., Acinetobacter sp., Clostridium sp., Ochrobactrum sp. and Arcobacter sp. were detected only in NEC tissue samples. In contrast to other studies they actually showed more bacterial diversity in the NEC babies than the controls, but that may be because of the nature of the controls, the controls had intestinal atresia, so they would all have to be very young, and the control tissue all came from the small intestine, whereas the NEC tissue was from large intestine, with some samples from the small.

Carl MA, et al. Sepsis from the gut: the enteric habitat of bacteria that cause late-onset neonatal bloodstream infections. Clinical infectious diseases. 2014;58(9):1211-8. This study report is difficult to interpret, which is a shame as it seems fascinating. The authors don’t say when they started collecting stools, nor how frequently, but they did find, in many infants who subsequently developed sepsis, that stools that had been collected beforehand were often colonized with organisms which seem identical to the organisms that they isolated from the blood. Those organisms included E coli (2) Serratia (2) and 3 cases of late onset sepsis caused by GBS (which is an unusually high proportion). A sepsis caused by Klebsiella and 2 MRSA were not preceded by intestinal colonization, and another baby had GBS colonization and was infected by a different GBS. Babies who did not develop sepsis did not have these particular organisms. The authors don’t say much about the microbiome of the non-septic babies.

How can we try and get our babies colonized with the good bugs?

Skin to skin contact with the baby’s mother, that’s how. Hendricks-Munoz KD, et al. Skin-to-Skin Care and the Development of the Preterm Infant Oral Microbiome. American journal of perinatology. 2015(EFirst). They showed associations between skin to skin care and development of the microbiome of the babies’ saliva, with “an accelerated pace of oral microbial repertoire maturity”.

Also don’t give them (or their mothers) antibiotics. Arboleya S, et al. Intestinal Microbiota Development in Preterm Neonates and Effect of Perinatal Antibiotics. The Journal of pediatrics. 2014(0). Because, the infants not exposed to antibiotics (either directly or via their mothers) had higher relative amounts of Comamonadaceae, Staphylococcaceae, and unclassified Bacilli . Infants not exposed to antibiotics also had significantly higher percentages of Bifidobacteriaceae, Streptococcaceae, unclassified Actinobacteria, and unclassified Lactobacillales and lower of Enterobacteriaceae than both groups of infants whose mothers received antibiotics.

Also give them human milk, its packed with goodies.

Underwood MA, et al. Human Milk Oligosaccharides in Premature Infants: Absorption, Excretion and Influence on the Intestinal Microbiota. Pediatr Res. 2015. Or at least it is if your mother is not a non-secretor. It seems that some mothers are homozygous for a gene that prevents them secreting fucosylated glycans into their breast milk. It also looks like this is quite common, 6 out of 1 mothers in this study were non-secretors, and this status had a big influence on the intestinal microbiome development. Also the sialylated oligosaccharides were very variable and some mothers produced milk that had oligosaccharides with little fucose or sialic acid.; those mothers’ babies had more dysbiosis than the others.

So choose your mother carefully if you are going to be born prematurely.

Barrett E, et al. The neonatal gut harbours distinct bifidobacterial strains. Archives of disease in childhood Fetal and neonatal edition. 2015. In this study from healthy full term infants they identified over 170 different bifidobacteria strains. Some of the babies were being breast fed, some receiving a formula without prebiotics, and some a formula with added prebiotics. In this case the prebiotics were galacto-oligosaccharides and poly-fructose. They showed that dietary prebiotic supplementation was associated with an increased prevalence of B. longum in infants in addition to increased strain diversity
Endo A, et al. Long-term monitoring of the human intestinal microbiota from the 2nd week to 13 years of age. Anaerobe. 2014;28(0):149-56. Ten subjects donated stool on multiple occasions during the first 13 years of their lives. They changed. Most of the change was in the first 12 months of life. The major changes were int eh relative abundance of the families of bugs, major species did not change dramatically. Probiotic supplementation in early life didn’t seem to have a lasting effect on the microbiome.

Hickey L, et al. Cross-colonization of infants with probiotic organisms in a neonatal unit. Journal of Hospital Infection. 2014;88(4):226-9. In this data from the ProPrems trial, only 3 of the 38 controls tested were cross-colonized with the probiotics they were testing. Which is lower than some other studies, maybe in Melbourne they are better at washing their hands.

And finally, two very nice review articles covering the issues.

Walker WA, Iyengar RS. Breast milk, microbiota, and intestinal immune homeostasis. Pediatr Res. 2015;77(1-2):220-8.

Pacheco AR, et al. The Impact of the Milk Glycobiome on the Neonate Gut Microbiota. Annual Review of Animal Biosciences. 2015;3(1):419-45.

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Neonatal updates

Ong KK, et al. Postnatal growth in preterm infants and later health outcomes: a systematic review. Acta Paediatrica. 2015;104(10):974-86.

This interesting systematic review confirms that the observational studies are fairly consistent, improved growth, and improved head circumference growth are associated with improved outcomes. As for the interventional studies the evidence is much weaker. Of the small number of trials some were only performed after discharge from the NICU, a couple are quite old trials with control groups who received what would now be considered to be inadequate intakes.

I guess the problem now is that it would be difficult to justify a study where one group received recommended intakes, and the other received less nutrition. We know that if you get close to recommended intakes you can get close to intra-uterine growth rates, so randomizing babies to have sub-optimal growth would be problematic.

I think that all we can do is to keep trying to get to optimal growth, and keep an eye on our outcomes.

Jering K, et al. Parenteral Nutrition as an Unexpected and Preventable Source of Mercury Exposure in Preterm Infants. The Journal of pediatrics. 2015;166(6):1533-5. In other nutritional news, TPN can be source of evil as well as good. Aluminium, manganese, and now mercury can be found in it. Although the levels were low, there was detectable mercury in the TPN in this NICU, maybe from sharing equipment for preparation of TPN for adults.

Jary S, et al. Less severe cerebral palsy outcomes in infants treated with therapeutic hypothermia. Acta Paediatr. 2015. Some babies treated with therapeutic hypothermia still develop cerebral palsy. This cohort study shows that they are less severely affected than a historical comparison group before hypothermia.

Brock JW, et al. Bladder Function After Fetal Surgery for Myelomeningocele. Pediatrics. 2015.  Children from the MOMS trial of antenatal surgical closure for meningomyelocele were followed. The bladder function outcomes were all better in the antenatal surgery group. The proportion who were using intermittent catheterisation at 30 months of age was 38% vs 51%, which was not statistically significant, but is quite a substantial difference. The other outcomes showed significantly less trabeculation and less open bladder neck with antenatal surgery.

The authors give a summary of the other results of the MOMS trial.

 In summary, prenatal surgery was associated with less need for cerebrospinal fluid shunt at 12 months and a better composite score for mental development and motor function at 30 months. Prenatal surgery also revealed benefit in several key secondary outcomes including hindbrain herniation, ability to walk unaided, and a better score on the Bayley II Psychomotor Development Index. These results were tempered by an increase in preterm birth and the risk of uterine dehiscence in the prenatal surgery group

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