A Comparative Study of the Performance of Water Hyacinth (Eichhornia Crassipes) and Water Lettuce (Pistias Stratiotes) in the Remediation of Produced Water

The study presents the characteristics of produced water obtained from a detention pit in the Niger Delta region of Nigeria. Phytoremediation, an emerging remediation technology for contaminated soils, groundwater, surfacewater and wastewater that is both low-tech, low-cost, and environmental friendly have been employed in this study. Two aquatic macrophytes: water hyacinth (Eichhornia crassipes) and water lettuce (Pistias stratiostes) have been used to remediate this produced water harmless in the environment. The two aquatic macrophytes were comparatively studied to determine their effectiveness in remediation without the use of fertilizers to sustain their growth. Also, physico-chemical parameters were compared with standard discharge limits stipulated by the Department of Petroleum Resources (DPR). Parameters such as pH, EC, salinity, TDS, TSS, DO, BOD, COD, turbidity, sulphate, phosphate, ammonia, oil and grease, Cu, Pb, Cr, Zn, Fe, and total coliform of the produced water have been studied using standard protocol of APHA and ASTM. The physico-chemical analysis revealed that most of the parameters were above the permissible limits and that water hyacinth made a better clean up than water lettuce. One-way ANOVA analysis of variance was used to test for significant difference. Recommendations were also made for better cleanup goals and plants survivals. Keywords: produced water, phytoremidiation, aquatic macrophytes, water lettuce, water hyacinth, contaminants

Profile of chest trauma in Zaria Nigeria: A prelminary report

Aims and Objectives Trauma continues to be a major cause of morbidity and mortality world over. This study is aimed at the patterns of presentation and the outcome of management. Materials and Methods A prospective study of trauma patients admitted to Ahmadu Bello University Teaching Hospital through the Accident and Emergency units was commenced in January 2008.This preliminary report is for the period of 27months.The clinical history, physical examination and outcome of management recorded in a predesigned proforma, were analysed with SPSS 15 and the patients were followed up in the surgical outpatient department. Results A total of 4784 patients (3143 men and 1641 women) were admitted during this period for trauma. There were a total of 628(13.13%) deaths. Of the 42 consecutive patients identified with chest trauma35 (83.3%) were males and 7(16.7%) were females. The age range was from 5-75years and the mean age was 35.4years, while the most affected ages were in the range of 20 to 49years. Blunt injury constituted 71.4% and penetrating injury constituted 28.6%. Road traffic accident was responsible for 61.9%, stab injury 21.4%, falls 7.1%, gunshot injury 4.8%, impalement 2.4% and animal attack also 2.4%. The average time taken between accident and admission was 31hours,40minutes and 12seconds while the average duration of hospital stay was 16.10 days. The injury pattern included rib fracture(s) (23.8%), hemopneumothorax (14.3%), hemothorax (7.1%), pneumothorax (4.8%), combinations of chest injuries (7.1%), chest laceration 7.1%, bruises 11.9%, lung contusion 4.8%, subcutaneous empyema 2.4%, flail chest 4.8% and no specific injury (11.9%). Associated injuries included head injury (63.6%), orthopaedic injury (27.3%) and combinations (abdominal, head, orthopaedic (9.1%). The fatality of road traffic accident was 36.8%. No patient was attended to by paramedics at the scene of accident while 21.9% of the patients had pre-hospital resuscitation in peripheral clinics before admission. The transfusion requirement was 14.3%. One patient (2.4%) required a median sternotomy and cardiopulmonary bypass, 54.8% required tube thoracostomy while 42.9% had general resuscitation /non-operative intervention. Only one (2.4%) required ICU care. The complication rate was 4.8%. The mortality rate was 2.4%. Only 7(16.7%) patients were seen beyond the first outpatient clinic appointment. Conclusion Most patients arriving at the hospital survived, requiring general resuscitation or simple tube thoracostomy with few complications. Mortalities from trauma and the cause of death at the site of accident are often not accounted for due to non-presentation to the hospital and lack of autopsy for those that present

Empyema thoracis in Zaria; A preliminary report

Aims and Objective To study the nature and pattern of presentation of empyema thoracis (and the association between duration or time of presentation and educational level and level of income respectively), the aetiology, and different treatment outcomes. Materials and Methods A prospective study of all patients who presented with Empyema Thoracis between January 2008 to May 2010 was carried out at ABUTH Zaria. The diagnosis of empyema thoracis was entertained from either the presence of pus in the pleural space or the culture of actively multiplying bacteria in a serous Data was analysed with SPSS 15. Results A total of 26 patients were managed, 19(73.1%) men, 7(26.9%) women. There were 4(15.4%) acute and 22(84.6%) chronic empyema. One male had bilateral chronic empyema giving 13 right-sided, and 14 left-sided empyema. Tuberculosis was responsible for 26.9% of the cases, 38.4% were post-pneumonic, while postoperative, and AIDS were each responsible for 11.5% and trauma 7.7%. Five patients had decortication, 2 had rib resection and open drainage, and the remainder were managed on tube thoracostomy. Two patients were discharged against medical advice, 6 were lost during follow-up. Fourteen (53.8%) were educated (1 acute and 13 chronic). Twelve (46.2 %) were uneducated (3 acute and 9 chronic). Fourteen patients (2 acute and 12 chronic) earned average or above average income while 12 (46.2%) earned below average income (2 acute and 10 chronic). There was no association between duration of presenting complaints and level of education or level of income (Fisher′s exact test was, 0.306 and 1.000, respectively) at a P value of 0.05 Conclusion Empyema thoracis is persistent and prevalent in our environment despite improvements in diagnosis, treatment and prevention. Most patients present late and this is not related to income or level of education. The commonest organism isolated from empyema fluid in developing countries is staphylococcus aureus but most empyema fluid are sterile due to prolong antibiotic use. The factors responsible for delayed presentation, the pattern of presentation and the pathology and outcome of treatment is part of an ongoing study

Cardiac pacemaker treatement of heart block in Enugu: a 5 year review

Background: Symptomatic heart block is a treatable cardiac cause of death which occurs globally. In Nigeria it is increasingly diagnosed and treated with permanent artificial cardiac pacemaker insertion and pulse generator implantation, sometimes after a period of misdiagnosis and inappropriate treatment. Methods: Twenty-three patients who were diagnosed with symptomatic heart block and surgically treated with permanent artificial cardiac pacemaker in National Cardiothoracic Centre, Enugu, between April 2001 and March 2006 had their case notes retrospectively reviewed and information entered into a proforma. This was analyzed. Patients diagnosed with symptomatic heart block but not treated with artificial cardiac pacemaker insertion were excluded from the study. There were eight such patients who could not afford the cost of surgical treatment during the period under review. Results: The mean age of the patients was 70 years and the commonest presentation was shortness of breath (100%). Hypertensive heart disease was present in 65% of the patients and a history of chronic chloroquine usage was positive in 73% of the patients. Predominant pre-treatment pulse rate was in the range of 30-40 per minute (43%) while 21% of the patients had pulse rate below 30 per minute. These categories of patients commonly had Stoke-Adams syndrome. Sixty-seven per cent of the patients had predominantly systolic hypertension on admission and 16% had hypotension. Third degree heart block was present in 65% of the patients and 89% of all patients needed pre-pacing haemodynamic stabilization with positive inotropic / chronotropic drug(s). Treatment consisted of permanent endocardial pacing in 65% and epicardial pacing in 35% of the patients with equally good response in symptoms, haemodynamic parameters and electrocardiographic features. Conclusion: Permanent artificial cardiac pacing is the reliable treatment of symptomatic heart block and should be included in the National Health Insurance Scheme list Nigerian Journal of Medicine Vol. 17 (1) 2008 pp. 7-1

The ASOS Surgical Risk Calculator: development and validation of a tool for identifying African surgical patients at risk of severe postoperative complications

Background: The African Surgical Outcomes Study (ASOS) showed that surgical patients in Africa have a mortality twice the global average. Existing risk assessment tools are not valid for use in this population because the pattern of risk for poor outcomes differs from high-income countries. The objective of this study was to derive and validate a simple, preoperative risk stratification tool to identify African surgical patients at risk for in-hospital postoperative mortality and severe complications. Methods: ASOS was a 7-day prospective cohort study of adult patients undergoing surgery in Africa. The ASOS Surgical Risk Calculator was constructed with a multivariable logistic regression model for the outcome of in-hospital mortality and severe postoperative complications. The following preoperative risk factors were entered into the model; age, sex, smoking status, ASA physical status, preoperative chronic comorbid conditions, indication for surgery, urgency, severity, and type of surgery. Results: The model was derived from 8799 patients from 168 African hospitals. The composite outcome of severe postoperative complications and death occurred in 423/8799 (4.8%) patients. The ASOS Surgical Risk Calculator includes the following risk factors: age, ASA physical status, indication for surgery, urgency, severity, and type of surgery. The model showed good discrimination with an area under the receiver operating characteristic curve of 0.805 and good calibration with c-statistic corrected for optimism of 0.784. Conclusions: This simple preoperative risk calculator could be used to identify high-risk surgical patients in African hospitals and facilitate increased postoperative surveillance. © 2018 British Journal of Anaesthesia. Published by Elsevier Ltd. All rights reserved.Medical Research Council of South Africa gran

Maternal and neonatal outcomes after caesarean delivery in the African Surgical Outcomes Study: a 7-day prospective observational cohort study.

BACKGROUND: Maternal and neonatal mortality is high in Africa, but few large, prospective studies have been done to investigate the risk factors associated with these poor maternal and neonatal outcomes. METHODS: A 7-day, international, prospective, observational cohort study was done in patients having caesarean delivery in 183 hospitals across 22 countries in Africa. The inclusion criteria were all consecutive patients (aged ≥18 years) admitted to participating centres having elective and non-elective caesarean delivery during the 7-day study cohort period. To ensure a representative sample, each hospital had to provide data for 90% of the eligible patients during the recruitment week. The primary outcome was in-hospital maternal mortality and complications, which were assessed by local investigators. The study was registered on the South African National Health Research Database, number KZ_2015RP7_22, and on ClinicalTrials.gov, number NCT03044899. FINDINGS: Between February, 2016, and May, 2016, 3792 patients were recruited from hospitals across Africa. 3685 were included in the postoperative complications analysis (107 missing data) and 3684 were included in the maternal mortality analysis (108 missing data). These hospitals had a combined number of specialist surgeons, obstetricians, and anaesthetists totalling 0·7 per 100 000 population (IQR 0·2-2·0). Maternal mortality was 20 (0·5%) of 3684 patients (95% CI 0·3-0·8). Complications occurred in 633 (17·4%) of 3636 mothers (16·2-18·6), which were predominantly severe intraoperative and postoperative bleeding (136 [3·8%] of 3612 mothers). Maternal mortality was independently associated with a preoperative presentation of placenta praevia, placental abruption, ruptured uterus, antepartum haemorrhage (odds ratio 4·47 [95% CI 1·46-13·65]), and perioperative severe obstetric haemorrhage (5·87 [1·99-17·34]) or anaesthesia complications (11·47 (1·20-109·20]). Neonatal mortality was 153 (4·4%) of 3506 infants (95% CI 3·7-5·0). INTERPRETATION: Maternal mortality after caesarean delivery in Africa is 50 times higher than that of high-income countries and is driven by peripartum haemorrhage and anaesthesia complications. Neonatal mortality is double the global average. Early identification and appropriate management of mothers at risk of peripartum haemorrhage might improve maternal and neonatal outcomes in Africa. FUNDING: Medical Research Council of South Africa.Medical Research Council of South Africa