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Isotonic balanced fluid versus 0.9% saline in patients with moderate to severe traumatic brain injury: A double-blinded randomised controlled trial

Poh K, Bustam A, Hasan MS, Mohd Yunos N, Cham CY, Lim FJ, et al.

Am J Emerg Med, 2024 Mar;77:106-114.
PMID: 38118385 DOI: 10.1016/j.ajem.2023.11.064

BACKGROUND AND IMPORTANCE: Traumatic brain injury (TBI) is a global health concern with significant economic impact. Optimal fluid therapy aims to restore intravascular volume, maintain cerebral perfusion pressure and blood flow, thus preventing secondary brain injury. While 0.9% saline (NS) is commonly used, concerns about acid-base and electrolyte imbalance and development of acute kidney injury (AKI) lead to consideration of balanced fluids as an alternative.
OBJECTIVES: This study aimed to compare the outcomes of patients with moderate to severe TBI treated with Sterofundin (SF) versus NS.
DESIGN, SETTINGS AND PARTICIPANTS: A double-blinded randomised controlled trial of patients aged 18 to 65 years with TBI was conducted at the University Malaya Medical Centre from February 2017 to November 2019.
INTERVENTION OR EXPOSURE: Patients were randomly assigned to receive either NS or SF. The study fluids were administered for 72 h as continuous infusions or boluses. Participants, investigators, and staff were blinded to the fluid type.
OUTCOMES MEASURE AND ANALYSIS: The primary outcome was in-hospital mortality. Relative risk (RR) with 95% confidence interval (CI) was calculated.
MAIN RESULTS: A total of 70 patients were included in the analysis, with 38 in the NS group and 32 in the SF group. The in-hospital mortality rate were 3 (7.9%) in the NS group vs. 4 (12.5%) in the SF group, RR = 1.29 (95% CI, 0.64 to 2.59; p = 0.695). No patients developed AKI and required renal replacement therapy. ICP on day 3 was significantly higher in the SF group (18.60 ± 9.26) compared to 12.77 ± 3.63 in the NS group, (95% CI, -11.46 to 0.20; p = 0.037). There were no significant differences in 3-day biochemical parameters and cerebral perfusion pressure, ventilator-free days, length of ICU stay, or Glasgow Outcome Scale-Extended (GOS-E) score at 6 months.
CONCLUSIONS: In patients with moderate to severe TBI, the use of SF was not associated with reduced in-hospital mortality, development of AKI, or improved 6-month GOS-E when compared to NS.

Matched MeSH terms: Saline Solution, Hypertonic/therapeutic use
Association between a chloride-liberal vs chloride-restrictive intravenous fluid administration strategy and kidney injury in critically ill adults

Yunos NM, Bellomo R, Hegarty C, Story D, Ho L, Bailey M

JAMA, 2012 Oct 17;308(15):1566-72.
PMID: 23073953 DOI: 10.1001/jama.2012.13356

Administration of traditional chloride-liberal intravenous fluids may precipitate acute kidney injury (AKI).

Matched MeSH terms: Saline Solution, Hypertonic/administration & dosage; Saline Solution, Hypertonic/adverse effects
Safety, tolerability and efficacy of LEGA-Kid® mechanical percussion device versus conventional chest physiotherapy in children: a randomised, single-blind controlled study

Hue YL, Lum LCS, Ahmad SH, Tan SS, Wong SY, Nathan AM, et al.

Singapore Med J, 2020 Jun 02.
PMID: 32480437 DOI: 10.11622/smedj.2020084

INTRODUCTION: Chest physiotherapy (CPT) may benefit children aged < 5 years who suffer from lower respiratory tract infection (LRTI). However, its effects are technique-dependent. This study aimed to determine whether mechanical CPT using the LEGA-Kid® mechanical percussion device is superior to manual CPT in children with LRTI.
METHODS: Children aged 5 months to 5 years who were admitted and referred for CPT from January to April 2017 were randomised to either manual CPT or mechanical CPT with LEGA-Kid®. Outcomes measured at pre-intervention and 2 hours post-intervention were respiratory rate (RR), oxygen saturation and modified Respiratory Distress Assessment Instrument (mRDAI) score.
RESULTS: All 30 enrolled patients had significant reduction in post-intervention RR and mRDAI scores. There was an 8% reduction in RR for the manual CPT group (p = 0.002) and a 16.5% reduction in the mechanical CPT group (p = 0.0001), with a significantly greater reduction in the latter (p = 0.024). mRDAI scores decreased by 2.96 in the manual group (p = 0.0001) and 3.62 in the mechanical group (p = 0.002), with no significant difference between the groups. There was no significant improvement in oxygen saturation, and no adverse events were observed after CPT.
CONCLUSION: Children receiving either manual or mechanical CPT showed improvements in respiratory distress symptoms with no adverse effects. A combined strategy of nebulised hypertonic saline followed by CPT for LRTI removes airway secretions and results in improvements of moderately severe respiratory distress. The LEGA-Kid mechanical CPT method was superior in reducing RR.

Matched MeSH terms: Saline Solution, Hypertonic
A comparison of sputum induction methods: ultrasonic vs compressed-air nebulizer and hypertonic vs isotonic saline inhalation

Loh LC, Eg KP, Puspanathan P, Tang SP, Yip KS, Vijayasingham P, et al.

Asian Pac J Allergy Immunol, 2004 Mar;22(1):11-7.
PMID: 15366653

Airway inflammation can be demonstrated by the modem method of sputum induction using ultrasonic nebulizer and hypertonic saline. We studied whether compressed-air nebulizer and isotonic saline which are commonly available and cost less, are as effective in inducing sputum in normal adult subjects as the above mentioned tools. Sixteen subjects underwent weekly sputum induction in the following manner: ultrasonic nebulizer (Medix Sonix 2000, Clement Clarke, UK) using hypertonic saline, ultrasonic nebulizer using isotonic saline, compressed-air nebulizer (BestNeb, Taiwan) using hypertonic saline, and compressed-air nebulizer using isotonic saline. Overall, the use of an ultrasonic nebulizer and hypertonic saline yielded significantly higher total sputum cell counts and a higher percentage of cell viability than compressed-air nebulizers and isotonic saline. With the latter, there was a trend towards squamous cell contaminations. The proportion of various sputum cell types was not significantly different between the groups, and the reproducibility in sputum macrophages and neutrophils was high (Intraclass correlation coefficient, r [95%CI]: 0.65 [0.30-0.91] and 0.58 [0.22-0.89], p < 0.001). Overall changes in median FEV, were small and comparable between all groups. Induction using ultrasonic nebulizers together with hypertonic saline was generally less well tolerated than compressed-air nebulizers and isotonic saline. We conclude that in normal subjects, although both nebulizers and saline types can induce sputum with reproducible cellular profile, ultrasonic nebulizers and hypertonic saline are more effective but less well tolerated.

Matched MeSH terms: Saline Solution, Hypertonic/administration & dosage
Fulltext Effects of self-prepared hypertonic nasal saline irrigation in allergic rhinitis: A randomized controlled trial

Sansila K, Eiamprapai P, Sawangjit R

Asian Pac J Allergy Immunol, 2020 Sep;38(3):200-207.
PMID: 30525740 DOI: 10.12932/AP-090618-0331

BACKGROUND: Nasal saline irrigation has been reported to be effective as an adjunctive therapy for allergic rhinitis (AR), but concerns about adverse events, supply problems, and high costs have limited its widespread clinical use. Aqueous 1.8% sodium chloride solution prepared by patients using drinking water (1.8% self-prepared hypertonic nasal saline irrigation; 1.8% SPHNSI) could solve some of these problems, but its clinical efficacy and safety need to be determined.
OBJECTIVE: We aimed to compare the efficacy and safety of 1.8% SPHNSI and 0.9% commercial isotonic nasal saline irrigation (0.9% CINSI) in patients with AR.
METHODS: A randomised, single-blinded, placebo-controlled trial was performed as a pilot study. Seventy-eight patients with AR were included. Each patient was randomised to nasal irrigation with 80 mL of either 1.8% SPHNSI or 0.9% CINSI twice-daily for 4 weeks. Randomised codes were generated using a computer and a block of 4 procedure. The primary outcome was improvement of quality of life scores in Thai patients with allergic rhinoconjunctivitis (Rcq-36). Secondary outcomes were clinical symptoms using total nasal symptom scores (TNSS) and adverse events. All outcomes were assessed by blinded assessors at baseline, week 2, and week 4.
RESULTS: At week 4, nasal irrigation with 1.8% SPHNSI had significantly improved the Rcq-36 score (54% versus 50%; p < 0.032) and congestion symptom score (96% versus 84%; p < 0.018) compared to nasal irrigation with 0.9% CINSI. Adverse events were comparable for both groups at week 4.
CONCLUSIONS: This pilot study indicates that regular use of 1.8% SPHNSI in AR patients for 4 weeks is safe and has superior efficacy to 0.9% CINSI for alleviating congestion and improving quality of life scores.

Matched MeSH terms: Saline Solution, Hypertonic/therapeutic use*
Fulltext Hyponatraemic encephalopathy as the initial presentation of Guillain-Barre syndrome

Ramanathan M

Med J Malaysia, 2008 Dec;63(5):426-7.
PMID: 19803310 MyJurnal

This report deals with an elderly lady with Guillain-Barre Syndrome (GBS), who presented with features of unusually severe hyponatraemia. The hyponatraemia was probably due to the syndrome of inappropriate secretion of antidiuretic hormone (SIADH). The hyponatraemia resolved with water restriction and infusion of hypertonic saline; GBS was treated with human immunoglobulin (IVIG). This patient's experience stresses the importance of monitoring serum sodium levels as hyponatraemia has been identified to be a marker of poor prognosis in GBS.

Matched MeSH terms: Saline Solution, Hypertonic/therapeutic use
Fulltext Sputum induction in corticosteroid-dependant asthmatics: risks and airway cellular profile

Loh LC, Kanabar V, D'Amato M, Barnes NC, O'Connor BJ

Asian Pac J Allergy Immunol, 2005 Dec;23(4):189-96.
PMID: 16572738

Sputum induction with nebulized hypertonic saline is increasingly being used to evaluate airway inflammation. We investigated the procedure-associated risk in 16 asthmatics that were still symptomatic despite on high doses of regular corticosteroid (CS) therapy (7 on daily inhaled CS > or = 800 microg budesonide or equivalent; 9 on additional daily oral CS) and their sputum cellular profile. For comparison, 12 mild stable asthmatics and 10 normal healthy subjects were included. All subjects inhaled 3%, 4% and 5% hypertonic saline sequentially via ultrasonic nebulizer as a means to induce sputum. Maximal percentage fall of Forced Expiratory Volume on One Second (FEV1) during sputum induction was significantly greater in CS-dependent asthmatics (median % [IQR]: 16.0 [11.0-32.3]) than in mild asthmatics (5.3 [4.2-10.8], p = 0.002] and in normal subjects (4.6 [3.4-6.4]), p = 0.0001). The maximal percentage FEV1 fall was inversely correlated with baseline FEV1 (Rs= -0.69; p < 0.0001). Compared to mild asthmatics, induced sputum from CS-dependant asthmatics had proportionately fewer eosinophils (2.2 [0.8-7.0] versus 23.3% [10.7-46.3], p = 0.003) and greater neutrophils (64.2 [43.9-81.2] versus 28.7 [19.0-42.6], p = 0.009). Sputum neutrophils showed a significant inverse correlation to FEV1 (Rs = -0.51, p = 0.01). We concluded that sputum induction using nebulized hypertonic saline should be performed with caution in CS-dependant asthmatics. The airway cellular profile observed suggests that the immunopathology underlying CS-dependant asthmatics may be different or a consequence of CS therapy.

Matched MeSH terms: Saline Solution, Hypertonic/administration & dosage*
Acute Symptomatic Hyponatremia After Computed Tomography Renal Protocol

Lim LY, Mohd Firdaus CA, Fam XI, Goh EH

J Comput Assist Tomogr, 2017 Jan;41(1):65-66.
PMID: 27680416 DOI: 10.1097/RCT.0000000000000487

Computed tomography (CT) is a widely used imaging modality. Although hyponatremia after CT imaging is rare, its effects can be devastating. Hyperosmolar radiocontrast acts as effective osmoles and causes fluid migration from intracellular into extracellular compartment. Dilutional hyponatremia will ensue if translocation of fluid is in excess of diuresis. This case report detailed an unusual case of acute symptomatic hyponatremia after CT renal protocol and the treatments given after its recognition.

Matched MeSH terms: Saline Solution, Hypertonic/administration & dosage
Fulltext Syndrome of inappropriate antidiuretic hormone caused by continuous lumbar spinal fluid drainage after transphenoidal surgery

Norlela S, Azmi KN, Khalid BA

Singapore Med J, 2006 Jan;47(1):75-6.
PMID: 16397727

A 53-year-old acromegalic woman had cerebrospinal fluid rhinorrhoea following transphenoidal surgery for a pituitary microadenoma. A continuous lumbar spinal fluid drainage catheter was inserted and on the sixth postoperative day, she developed hyponatremia with features of syndrome of inappropriate antidiuretic hormone (SIADH) requiring hypertonic saline administration. Over-drainage is potentially hazardous and close biochemical monitoring is required. To our knowledge, this is the first reported case of SIADH caused by continuous lumbar drainage in an adult.

Matched MeSH terms: Saline Solution, Hypertonic/therapeutic use
Fulltext A case of persistent hyponatraemia due to reset osmostat

Rohana AG, Norasyikin AW, Suehazlyn Z, Ming W, Norlela S, Norazmi MK

Med J Malaysia, 2006 Dec;61(5):638-40.
PMID: 17623970 MyJurnal

We report a case of a 65 year old Malay lady with long-standing diabetes mellitus, who presented to our institution with a one month history of worsening neck pain and progressive upper and lower limb weakness. She was stable despite severe hyponatraemia which was initially treated as syndrome of inappropriate anti-diuretic hormone (SIADH). This was consistent with her underlying illness which was concluded as cervical tuberculosis (TB) with spinal cord compression. She underwent decompression and bone grafting. Despite continuous treatment her serum sodium levels remained low. There were no other problems with her adrenals or thyroid. A water loading and hypertonic saline perfusion test was performed and supported the diagnosis of reset osmostat. Her serum sodium remained below the normal range and she was discharged well.

Matched MeSH terms: Saline Solution, Hypertonic
Fulltext Salt appetite is reduced by a single experience of drinking hypertonic saline in the adult rat

Greenwood MP, Greenwood M, Paton JF, Murphy D

PLoS One, 2014;9(8):e104802.
PMID: 25111786 DOI: 10.1371/journal.pone.0104802

Salt appetite, the primordial instinct to favorably ingest salty substances, represents a vital evolutionary important drive to successfully maintain body fluid and electrolyte homeostasis. This innate instinct was shown here in Sprague-Dawley rats by increased ingestion of isotonic saline (IS) over water in fluid intake tests. However, this appetitive stimulus was fundamentally transformed into a powerfully aversive one by increasing the salt content of drinking fluid from IS to hypertonic saline (2% w/v NaCl, HS) in intake tests. Rats ingested HS similar to IS when given no choice in one-bottle tests and previous studies have indicated that this may modify salt appetite. We thus investigated if a single 24 h experience of ingesting IS or HS, dehydration (DH) or 4% high salt food (HSD) altered salt preference. Here we show that 24 h of ingesting IS and HS solutions, but not DH or HSD, robustly transformed salt appetite in rats when tested 7 days and 35 days later. Using two-bottle tests rats previously exposed to IS preferred neither IS or water, whereas rats exposed to HS showed aversion to IS. Responses to sweet solutions (1% sucrose) were not different in two-bottle tests with water, suggesting that salt was the primary aversive taste pathway recruited in this model. Inducing thirst by subcutaneous administration of angiotensin II did not overcome this salt aversion. We hypothesised that this behavior results from altered gene expression in brain structures important in thirst and salt appetite. Thus we also report here lasting changes in mRNAs for markers of neuronal activity, peptide hormones and neuronal plasticity in supraoptic and paraventricular nuclei of the hypothalamus following rehydration after both DH and HS. These results indicate that a single experience of drinking HS is a memorable one, with long-term changes in gene expression accompanying this aversion to salty solutions.

Matched MeSH terms: Saline Solution, Hypertonic

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