Preoperative Intravenous Dexamethasone and Postoperative Analgesia Following Breast Surgery: A Prospective, Randomized Double-Blind Trial at a Tertiary Healthcare Facility in Ghana.

Introduction: Breast surgery may be associated with significant postoperative pain and if not adequately treated, may lead to the development of chronic post-surgical pain. This necessitates the use of effective management, involving the use a multimodal analgesia regimen for the management of post breast surgery pain. The analgesic effect of perioperative use of dexamethasone has been explored but findings have been inconsistent. Aim: The aim of this study was to determine the postoperative analgesic enhancing effect of a single preoperative dose of dexamethasone on patients undergoing breast surgery at a tertiary hospital in Ghana. Materials and Methods: This was a prospective, double-blind, placebo-controlled study involving 94 consecutively recruited patients. Patients were randomized into two groups: dexamethasone (n = 47) and placebo (n = 47). Patients in the dexamethasone group had 8mg (2 mL of 4 mg/mL) dexamethasone and those in the placebo group had 2 mL of saline administered intravenously just before induction of anaesthesia. All patients received a standard general anaesthesia with endotracheal intubation. The numerical rating score (NRS), time to first analgesic request and the total opioid consumed in the first 24 h were recorded. Results: Patients receiving dexamethasone had lower NRS scores at all measured time points but this was significant only at 8 h post-surgery (P = 0.037). The time to first rescue analgesia was significantly prolonged in the dexamethasone group (339.26 ± 312.90 min vs. 182.10 ± 166.72 min; P = 0.020). However, the mean total opioid (pethidine) consumed in the first 24 h postoperatively was not significantly different between the dexamethasone and control groups (113.75 ± 51.35 mg vs. 100.00 ± 60.93 mg; P = 0.358). Conclusion: A single preoperative dose of 8mg dexamethasone given intravenously, reduces postoperative pain compared to placebo, significantly reduces the time to first analgesia but not the total opioid consumed in the first 24 h post breast surgery.

A Simplified Adult Expiratory Support Device: First Clinical Cases in a Low-Resource Setting.

PURPOSE: In low and middle-income countries, mechanical ventilators or commercially available devices used to offer continuous positive airway pressure are not readily affordable and available. In Ghana, nearly 10% of critically ill patients presenting to the emergency department require ventilator support. DESCRIPTION: We designed, built, and tested a simple expiratory positive airway pressure (EPAP) device to provide adult respiratory support in low resource environments with or without supplemental oxygen and without the need for electricity. EVALUATION: Laboratory tests demonstrated that the device is capable of delivering EPAP at levels expected to provide significant assistance to some patients. We present the first 2 cases where the use of this simple EPAP device provided critical respiratory support during weaning of patients from mechanical ventilation. CONCLUSIONS: A low-cost 3-dimensional printable adult respiratory support device could provide substantial benefit to patients suffering from respiratory distress through the delivery of appropriate levels of EPAP in a low-resource setting with limited infrastructure. Further clinical validation is needed for broader application in low-resource settings.

Total Serum Magnesium Levels and Calcium-To-Magnesium Ratio in Sickle Cell Disease.

Background and objectives: Imbalance of calcium/magnesium ratio could lead to clinical complications in sickle cell disease (SCD). Low levels of magnesium have been associated with sickling, increased polymerization and vaso-occlusion (VOC) in sickle cell due to cell dehydration. The K-Cl cotransport plays a very important role in sickle cell dehydration and is inhibited by significantly increasing levels of magnesium. The study evaluated total serum magnesium levels and computed calcium/magnesium ratio in SCD patients and "healthy" controls. Materials and methods: The study was a case-control cross-sectional one, involving 120 SCD patients (79 Haemoglobin SS (HbSS)and 41 Haemoglobin SC (HbSC)) at the steady state and 48 "healthy" controls. Sera were prepared from whole blood samples (n = 168) and total magnesium and calcium measured using a Flame Atomic Absorption Spectrometer (Variant 240FS manufactured by VARIAN Australia Pty Ltd., Melbourne, VIC, Australia). Calcium/magnesium ratios were calculated in patients and the controls. Results: The prevalence of hypomagnesemia and hypocalcaemia among the SCD patients was observed to be 39.17% and 52.50% respectively, higher than the controls (4.17% and 22.92%, for hypomagnesemia and hypocalcaemia, respectively). Level of magnesium was significantly lower in the SCD patients compared to their healthy counterparts (p = 0.002). The magnesium level was further reduced in the HbSS patients but not significantly different from the HbSC patients (p = 0.584). calcium/magnesium ratio was significantly higher in the SCD patients (p = 0.031). Although calcium/magnesium ratio was higher in the HbSC patients compared to those with the HbSS genotype, the difference was not significant (p = 0.101). Conclusion: The study shows that magnesium homeostasis are altered in SCD patients, and their levels are lower in HbSS patients. Although calcium/magnesium ratio is significantly higher in SCD patients compared with controls, there is no significant difference between patients with HbSS and HbSC genotypes. Magnesium supplementation may be required in sickle cell patients.

Serum Calcium and Magnesium Levels in Normal Ghanaian Pregnant Women: A Comparative Cross-Sectional Study.

BACKGROUND: Pregnancy is described as a normal physiologic state associated with various biochemical changes. Magnesium and calcium are essential macronutrients required for foetal growth. Complications associated with their deficiency during normal pregnancy include; low neonatal birth weight, pre-eclampsia, eclampsia and preterm labour. Changes in serum levels of magnesium and calcium in normal pregnancy have not been extensively studied among Ghanaian women. AIM: To determine the variation in serum magnesium and calcium levels with gestational age in normal pregnancy in Ghanaian women. METHODS: A hospital-based comparative cross-sectional study was conducted among 32 normal non-pregnant women (Group A) and 100 normal pregnant women (Group B) attending the clinic at the Korle-Bu Teaching hospital. The group B pregnant women were further divided into Group B1 (n = 33), Group B2 (n = 37) and Group B3 (n = 30) based on their pregnancy gestation as first, second and third trimester respectively. Blood samples were obtained from the antecubital vein of subjects and total serum calcium, magnesium, protein and albumin were estimated. Data obtained were analysed using SPSS for windows version 20. Analysis of variance (ANOVA) was employed to determine the statistical differences between the groups. A p-value of ≤ 0.05 was considered significant. RESULTS: Mean serum total calcium and magnesium in first, second and third trimester normal pregnant women were 2.14 ± 0.16, 2.13 ± 0.44, 2.13 ± 0.35 mmol/L and 0.77 ± 0.11, 0.77 ± 0.16 and 0.76 ± 0.14 mmol/L respectively. Mean serum total calcium and magnesium levels in non-pregnant women were 2.20 ± 0.16 and 0.80 ± 0.10 mmol/L respectively. There was a statistically non-significant difference in serum total calcium and magnesium between non-pregnant and normal pregnant women, with p-values of 0.779 and 0.566 respectively. Mean total serum protein and albumin in first, second and third-trimester normal pregnant women were 68.42 ± 10.37, 70.46 ± 6.84, 66.70 ± 7.83 g/L and 39.92 ± 3.22, 40.75 ± 8.06, 38.26 ± 3.02 g/L respectively. Mean total serum protein and albumin in non-pregnant women were 73.13 ± 7.02 and 42.94 ± 3.03 g/L respectively. Mean total serum protein and albumin levels were lower in pregnant women as compared to non-pregnant women with the difference being significant in the third trimester (p-values of 0.012 and 0.002). CONCLUSION: Total serum calcium and magnesium levels in normal pregnancy were non-significantly lower compared to non-pregnant women in Ghana. There was a reduction in total serum protein, and albumin levels during pregnancy with a significant reduction noticed during the third trimester compared to the non-pregnant state.

Nitric Oxide and Pre-Eclampsia: A Comparative Study in Ghana.

BACKGROUND: Preeclampsia is one of the commonest aetiologies of foetal and maternal mortality and morbidity. Though common, the aetiology of preeclampsia has remained unknown with several inconclusive theories surrounding the disease. Recent studies have implicated vascular endothelial dysfunction and possibly nitric oxide in preeclampsia. AIM: To compare plasma nitric oxide levels in pre-eclampsia and healthy pregnant women in a large tertiary hospital in Ghana. METHODS: This was a case-control study conducted among pre-eclampsia and healthy pregnant women in Korle-Bu Teaching Hospital over a four-month period. Thirty (30) pre-eclamptic and 30 healthy pregnant women aged 18-35 years with over 30 weeks' gestation were consecutively recruited into the study after obtaining informed consent. Plasma nitric oxide levels were determined using the Griess Reagent system. Data were analysed using Statistical Package for the Social Sciences (SPSS) software version 20.0 and results were compared using the independent t-test. A P-value of ≤ 0.05 was considered statistically significant. RESULTS: The parity and body mass index (BMI) of the participants were similar. There was a significant difference in the blood pressure of the pre-eclamptic compared to healthy pregnant women. There was no statistically significant difference (P-value = 0.160) in the plasma levels of nitric oxide in pre-eclamptic (Mean = 1178.78; SD = 89.70 nM) compared to healthy pregnant women (Mean = 1365.43; SD = 95.46 nM). CONCLUSION: Plasma nitric oxide levels may not play a significant role in the aetiology of pre-eclampsia.