Perioperative Care Clinical Trial
Official title:
A Protocol Of Perioperative Care Plus Immunonutrition Enhances Recovery After Total Hip Arthroplasty. A Randomized Pilot Study
The aim of this pilot study was to investigate whether the use of a multimodal protocol of preoperative care plus preoperative immune nutrition would decrease the length of stay and acute phase inflammation in patients submitted to total hip arthroplasty (THA). The study was designed to be randomized and controlled, but not double blind. The patients were randomized to receive either preoperative care based on evidence plus immune nutrition for 5 days prior to surgery (Acerto group) or traditional preoperative care (control group). Main endpoints were length of stay and acute-phase postoperative response
A large broad of evidence has shown that traditional perioperative care have a weak
scientific basis and needs to be changed. Multimodal or fast-track protocols of
perioperative care for abdominal surgery have been associated with lower morbidity, lower
costs and faster postoperative recovery when compared to traditional care . Similarly the
prescription of perioperative immune nutrition for 5-7 days before major abdominal surgery
may decrease the risk of infections and reduce postoperative length of stay (LOS).
Interestingly there is lack of studies on multimodal protocols of enhanced recovery and on
immune nutrition in elective total hip arthroplasty (THA). In Brazil, the ACERTO (an acronym
in Portuguese for acceleration of postoperative recovery) protocol is a multimodal protocol
of perioperative care that includes: shortening of preoperative fasting with carbohydrates
(CHO)-rich drinks up to 2h before surgery, restriction of intravenous fluids and early
postoperative re-feeding and mobilization. Recently as a dynamic protocol the Acerto
protocol included the recommendation of perioperative immune nutrition. All the elements of
the protocol are based on evidence and are recommended by various international guidelines
and consensus. Thus, the aim of this pilot study was to investigate whether the use of the
Acerto multimodal protocol plus preoperative immune nutrition would decrease the length of
stay and acute phase inflammation in patients submitted to THA.
METHODS This was a prospective randomized pilot study. All procedures were performed at São
Mateus Hospital (Cuiabá, Brazil) from May 2012 to February 2013. The study was approved by
the Research Ethics Committee of the Júlio Müller University Hospital (Federal University of
Mato Grosso) and all patients signed a term of informed consent.
Inclusion and exclusion criteria. The investigators included adult patients of both sex
having a hip osteoarthrosis and candidates of elective THA. Patients were excluded if they
had fasting glycemia greater than 200mg/dl; acquired immunodeficiency (AIDS); renal failure
(creatinin above 2 mg/dl); cirrhosis; moderate or serious Alzheimer's disease (clinical
dementia rating score between 2 and 3); an American Society of Anesthesiologists (ASA) score
higher than 2; previous spinal surgery (arthrodesis) or THA (reviewing or changing the
prosthetic); and severe malnutrition (history of loss of 10% of body weight over the last 6
months). The investigators also excluded patients who did not have their blood samples taken
at the scheduled time and those who broke perioperative protocol, e.g. the non-intake of the
immune supplement in the Acerto group.
Design of the study. Patients were consecutively included and randomized into two groups:
Group Control and ACERTO group with the aid of electronic software of random numbers
available at www.graphpad.com. All patients were assessed by a multidisciplinary team, who
carried out a nutrition assessment, preoperative education, and collected the relevant
anthropometric, biochemical and clinical data.
Anesthesia and operative technique. Antibiotic prophylaxis was done with 2g of intravenous
kefazolin at the time of anesthetic induction. Measures were taken against postoperative
nausea and vomiting (PONV) according to the protocol applied by the anesthesia team and will
be discussed in this paper. Preoperative sedation was done with intravenous midazolam (0.03
to 0.1mg/kg) and propofol (30 to 60 mcg/kg/min) No general anesthetic was applied in both
groups. All subjects received epidural neuro-axis blockage at L3-L4 space with ropivacain
7.5% to 10% (150-200mg) and morphine chlorate 2mg (30 to 50 micrograms/kg). The surgical
access of the hip was done by anterior-lateral approach. The investigators used in all cases
hybrid type total arthroplasty (cementation of the femoral component and fixation of the
acetabular component by means of pressure fitting of the implant to the bone and the
addition of screws to the acetabular cup when necessary).
Carbohydrate drink Patients belonging to the Acerto group received a drink (200 mL)
containing water plus 12% maltodextrin 2h before the induction of anesthesia.
Immune supplementation therapy. The patients in the ACERTO group received an immune
supplement containing arginine, w-3 fatty acids, nucleotides, and vitamins (Impact; Nestlé;
Sao Paulo, Brazil. Formula: proteins: 23% (77% calcium caseinate, 23% arginine);
carbohydrates: 52% (100% maltodextrin); lipids: 25% (68% fish oil; 20% medium-chain
triglycerides and 12% corn oil), vitamins and electrolytes) for five days prior to surgery,
with a daily dosage of thress units (600ml per day in total).
Blood samples. Blood samples were collected preoperatively and at the 2nd PO day and assayed
for CRP assay.
Criteria for hospital discharge.
Discharge was signed by an orthopedic surgeon if all of these five parameters were
fulfilled:
1. patient is confident and willing to go home,
2. no pain or pain controlled by oral analgesics,
3. walking alone or with minimal help,
4. no fever or signs of postoperative infection, and
5. accepting normal oral diet
Outcome variables The main outcome variable was the postoperative length of stay. As
secondary outcome variables it was compared the evolution of serum C-reactive protein (CRP)
overtime.
Statistical analysis. The calculation of the sample was based on the premise that the
intervention with the Acerto Project protocol would reduce the hospital stay length by 50%.
For a β error (type II) of 20% and an α error (type I) of 5%, it was calculated that 15
patients in each group would be sufficient for this study. Investigators used paired and
unpaired t-test when samples were homogeneous or the Mann-Whitney test or the Wilcoxon test
if samples were heterogeneous. Categorical variables were compared by the chi square test or
Fisher exact test. Statistical analyses were made using the Minitab 14 and the null
hypothesis rejection was fixed at 0.05 (α=5%).
;
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Outcomes Assessor), Primary Purpose: Prevention
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