Re-telling the story of aminoglycoside ototoxicity: tales from sub-Saharan Africa.

Background: Aminoglycosides, such as Streptomycin, are cheap, potent antibiotics widely used Sub-Saharan Africa. However, aminoglycosides are the commonest cause of ototoxicity. The limited prospective epidemiological studies on aminoglycoside ototoxicity from Sub-Saharan Africa motivated this study to provide epidemiological information on Streptomycin-induced ototoxicity, identify risk factors and predictors of ototoxicity. Method: A longitudinal study of 153 adults receiving Streptomycin-based anti-tuberculous drugs was done. All participants underwent extended frequency audiometry and had normal hearing thresholds at baseline. Hearing thresholds were assessed weekly for 2 months, then monthly for the subsequent 6 months. Ototoxicity was determined using the ASHA criteria. Descriptive statistics were used to analyze socio-demographic variables. Ototoxicity incidence rate was calculated, and Kaplan-Meier estimate used to determine cumulative probability of ototoxicity. Chi-square test was done to determine parameters associated with ototoxicity and Cox regression models were used to choose the predictors of ototoxicity. Results: Age of participants was 41.43 ± 12.66 years, with a male-to-female ratio of 1:0.6. Ototoxicity was found in 34.6% of the participants, giving an incidence of 17.26 per 1,000-person-week. The mean onset time to ototoxicity was 28.0 ± 0.47 weeks. By 28th week, risk of developing ototoxicity for respondents below 40 years of age was 0.29, and for those above 40 years was 0.77. At the end of the follow-up period, the overall probability of developing ototoxicity in the study population was 0.74. A significant difference in onset of ototoxicity was found between the age groups: the longest onset was seen in <40 years, followed by 40-49 years, and shortest onset in ≥50 years. Hazard of ototoxicity was significantly higher in participants aged ≥50 years compared to participants aged ≤40 years (HR = 3.76, 95% CI = 1.84-7.65). The probability of ototoxicity at 40 g, 60 g and 80 g cumulative dose of Streptomycin was 0.08, 0.43 and 2.34, respectively. Age and cumulative dose were significant predictors of ototoxicity. Conclusion: The mean onset time to Streptomycin-induced ototoxicity was 28 weeks after commencement of therapy. Age and cumulative dose can reliably predict the onset of Streptomycin-induced ototoxicity. Medium to long term monitoring of hearing is advised for patients on aminoglycoside therapy.

Multicenter Pattern of Cleft Surgeries and Factors Associated with Late Primary Cleft Surgery in Nigeria.

Background: This study aimed to analyze multicenter patterns in cleft deformity surgeries and identify factors associated with the timing of primary cleft repair in Nigeria. Methods: A cross-sectional study of children managed for clefts from January 2009 to December 2020 at three Smile Train partner tertiary institutions situated in the east (Enugu), west (Ibadan), and northern (Jos) parts of the country using a prospectively collected database. Outcomes were the types of surgery performed, yearly volume of surgeries, methods of repair, and time of surgery (early versus late). Results: Of 1043 cleft surgeries, nearly half (45.7%) involved infants (<12 months). Primary repairs of the lip or palate were performed in 83.4% of cases, with 58.4% for lip repairs and 25.1% for palate repairs. The most common cleft lip repair method was a variant of Millard rotation advancement flap. Over the study years, there was a shift from von Langenbeck palatoplasty to methods such as Bardach's palatoplasty and intravelar veloplasty. Patients with bilateral cleft lip defects were significantly more likely (P < 0.001) to undergo early repairs compared with those with unilateral defects. Late primary cleft lip repairs were significantly (P < 0.001) more common in Enugu. Conclusions: This study highlights the variability in cleft surgery patterns in Nigeria. Late primary cleft surgeries were associated with less severe cleft lip or cleft palate and were more prevalent in Enugu, Southeastern Nigeria. The findings contribute valuable insights for optimizing surgical approaches and resource allocation in the management of cleft deformities in the region.

Thermographic Mapping of Arterial Perforators in the Leg.

Background: Preoperative localisation of perforators aids in easy intraoperative dissection. Infrared thermography is a simple, safe, and effective tool with a short learning curve that is useful in identifying perforators. It has been found to have a high concordance rate when compared with computed tomography angiography and is useful in identifying arterial perforators in the leg. Objectives: To create a thermographic map of arterial perforators in the leg and to determine the correlation between the number of perforators identified and the length of the leg. Materials and Methods: This was a cross-sectional study. The length of the leg was measured and the location of perforators corresponding to the distribution of the anterior tibial, posterior tibial, and peroneal arteries was identified using thermography. The mean number of perforators corresponding to the different surfaces of the leg was noted, this was then correlated with the length of the leg using the Pearson correlation coefficient. Results: Using thermography, perforators were identified along a line drawn from the medial malleolus to the medial tibia plateau and from the lateral malleolus to the head of the fibula and within 2 cm of these lines. More perforators were found in the middle third of the leg and there was no significant correlation between the number of perforators and the length of the leg. Conclusion: A useful surface marking to aid the identification of perforators in the leg using infrared thermography was found. There was no significant correlation between the length of the leg and the number of perforators.

Presentation, Clinical Outcome, and Quality of Life of Patients Treated for Head and Neck Skin Cancer at the University College Hospital, Ibadan.

Introduction: Patients with head and neck skin cancer experience adverse functional, psychosocial, and financial impacts as a result of the disease and/or its treatment. This study aimed at evaluating the pattern of presentation, clinical outcomes, and quality of life of patients with head and neck skin cancer. Materials and Methods: A retrospective cross-sectional study of patients with head and neck skin cancer presenting to the Department of Plastic, Reconstructive & Aesthetic Surgery of the University College Hospital, Ibadan, from January 2017 to December 2021. Data obtained from the clinical records included sociodemographic characteristics, clinical and surgical details, as well as clinical outcomes. Quality of life was assessed using EORTC QLQ-C30 questionnaires. Data were summarized using descriptive statistics. Results: Nineteen patients were reviewed with a median age of 38 years (ranging from 18 to 85 years) and a male-to-female ratio of 1:1.4. Eight (42.1%) of the patients were albinos. Squamous cell carcinoma was the predominant histologic type (63.2%), while the scalp was the commonest location (42.1%). Only one patient (5.3%) presented with metastatic disease. A greater percentage of treated patients, eight (61.5%), had surgery as the only treatment modality. After a mean follow-up period of 33 months, a recurrence rate of 10.5% (two patients) and a mortality rate of 15.8% (three patients) were recorded. Quality of life assessment revealed an adverse financial impact of the disease on our patients. Conclusion: Although albinism is a recognized risk factor for skin cancers, head and neck skin cancers can occur in the dark-skinned.

Differences in burn wound size estimation between points of referral and the burn unit: experience at a major burn center in southwestern Nigeria.

BACKGROUND: Accurate burn wound size estimation is important for resuscitation and subsequent management. It is also important for the development of referral guidelines in Nigeria. OBJECTIVE: To establish whether a significant discrepancy exists in burn size estimation between referral centers and burn units. METHODS: A retrospective review of burn patients managed at the burn unit of a premier tertiary hospital in Ibadan, southwestern Nigeria, between January 1, 2016, and October 31, 2019 was conducted. Patients' demographic and other characteristics, inclusive of TBSA estimation from point of referral and the burn unit, were retrieved and analyzed. RESULTS: A total of 96 burn injury records were found for the study period, with a male-to-female ratio of 1.3:1. Thirty-five records (36.5%) included no burn size estimation by the referring physician. There was a statistically significant difference in TBSA estimation between referring physicians and burn unit physicians (P = .015). Burn wounds were more likely to be overestimated than underestimated (P = .016). Overestimation is more likely with minor burns and in pediatric patients. Underestimation was more likely in adults. CONCLUSION: There is a significant difference in burn size estimation between burn unit physicians and referring physicians. This finding underscores the need for continuous education on burn estimation to aid proper referral and management.

Changing Epidemiology and Outcome of Pediatric Thermal Burn Injury in South Western Nigeria.

The pediatric age group has been noted to be particularly vulnerable to burn injuries. Burn is the fifth most common cause of childhood injuries. Nigeria has a very young population with a median age of 18.1 years. Scald is the most common form of burn injuries in this age group globally; however, previous reports from our institution found flame to be the most common form of burn in pediatric age. The most recent report from 13 years ago still maintained flame as the most common cause of pediatric burn injury. This study was carried out to determine the changes in epidemiology and outcome of pediatric thermal burn injury. This was a retrospective study carried out between January 2013 and December 2022. Data were analyzed using the statistical package for social sciences software version 23. The significance was set at a P-value of .05. Two hundred and sixty-five children presented with thermal burn with a male-to-female ratio of 1.3:1. 63.4% occurred in children 0-5 years. Scald (59.6%) was the most common cause of injury. Most flame injuries in females were due to liquified petroleum gas cookstove explosion, while petrol explosion was the most common cause in males (P ≤ .001). There is a yearly increase in burn depth (P = .009). Most inhalation injuries occurred in those aged 11-16 years (P = .006). Mortality rate was 10.2%, with total body surface area burned (P ≤ .001), burn depth (P ≤ .001), and inhalation injury (P ≤ .001) associated with increasing mortality. Scald is now the most common cause of thermal burn in our institution, with a remarkable reduction in mortality rate.

The Impact of Covid-19 Pandemic on Acute Burn Admissions at the University College Hospital, Ibadan, Nigeria.

The coronavirus disease and the subsequent pandemic that followed drastically changed human civilization with disruptive effects on health and overall wellbeing of mankind. This disruptive effect has been shown to include changes in epidemiology of burn injuries. This study therefore aimed to determine the impact of covid-19 on acute burn presentation at the University College Hospital (UCH), Ibadan. This was a retrospective study carried out between April 1, 2019 and March 31, 2021. The period was divided into two: April 1, 2019 to March 31, 2020 and April 1, 2020 to March 31, 2021. Data obtained from the burn unit registry were analyzed using the Scientific Package For Social Sciences version 25. The only statistically significant finding from this study was the marked reduction in burn ICU admission during the pandemic (P < 0.001). A total of 144 patients presented to the burn intensive care unit at UCH, Ibadan during the period under review with 92 patients in the prepandemic year, and 52 patients in the pandemic year. Patient group from 0- to 9-year-olds representing 42% in prepandemic, and 30.8% in the pandemic period was the most affected age group. Scald was predominantly among the pediatric age group in both groups. Males were more likely to suffer flame burn in both study periods with a near gender equilibration during the pandemic. Burn injury during the pandemic resulted in more total body surface area burned. The lockdown effect of the pandemic resulted in a significant reduction in acute burn admissions at the UCH, Ibadan.

Current Trend in the Epidemiology of Thermal Burn Injury at a Tertiary Hospital in South Western Nigeria.

Worldwide, thermal burn is the leading etiological type of burn injury accounting for 86% of burn injuries requiring admissions. Flame, Scald, and contact burn are the leading causes of thermal burn. Changes in the sociodemographic characteristics of societies have led to alterations in the epidemiology of burn. An understanding of such changes in the epidemiology of burn is essential in formulating and executing adequate burn prevention programs. We sought to establish the current trend in the etiology, gender distribution, age, occurrence of inhalation injury, burn surface area, burn depth, and mortality rate of thermal burns at Ibadan. This was a retrospective study carried out between January 2013 and December 2022. Thermal burns constitute 92% of burn injuries. The male-to-female ratio was 1.4:1. There were 265 (45%) patients in the pediatric age group and 323 adults (55% of the patients). The proportion of flame, scald, and contact burns were 378 (58%), 203 (32%), and 14 (2%), respectively. Flame burns resulting from liquified petroleum gas (LPG) explosion show a rising trend, with a decline in flame burns from kerosene (P < .001). One hundred and ninety (32%) patients had inhalation injury. The overall mortality was 19% (N = 114). Kerosene flame, 38% (17 of 45 patients), and LPG, 32% (41 of 130 patients), were the most lethal causes of flame injuries (P < .043). The study shows the increasing contribution of LPG to the etiology of thermal burn injuries. Burn prevention programs should target safe use of LPG stoves and cylinders.

Trends of cleft surgeries and predictors of late primary surgery among children with cleft lip and palate at the University College Hospital, Nigeria: A retrospective cohort study.

BACKGROUND: Cleft of the lip and palate is the most common craniofacial birth defect with a worldwide incidence of one in 700 live births. Early surgical repairs are aimed at improving appearance, speech, hearing, psychosocial development and avoiding impediments to social integration. Many interventions including the Smile Train partner model have been introduced to identify and perform prompt surgical procedures for the affected babies. However, little is known about the trends of the incidence and surgical procedures performed at our hospital. Nothing is also known about the relationship between the clinical characteristics of the patients and the timing of primary repairs. OBJECTIVE: To determine the trends in cleft surgeries, patterns of cleft surgeries and identify factors related to late primary repair at the University College Hospital, UCH, Ibadan, Nigeria. METHODS: A retrospective cohort study and trends analysis of babies managed for cleft lip and palate from January 2007 to January 2019 at the UCH, Ibadan was conducted. The demographic and clinical characteristics were extracted from the Smile Train enabled cleft database of the hospital. The annual trends in rate of cleft surgeries (number of cleft surgeries per 100,000 live births) was represented graphically. Chi square test, Student's t-test and Mann Whitney U were utilised to assess the association between categorical and continuous variables and delay in cleft surgery (≥12 months for lip repair, ≥18months for palatal repair). Kaplan-Meier graphs with log-rank test was used to examine the association between sociodemographic variables and the outcome (late surgery). Univariable and multivariable Cox proportional hazard regression was conducted to obtain the hazard or predictors of delayed cleft lip surgery. Stata version 17 (Statacorp, USA) statistical software was utilised for analysis. RESULTS: There were 314 cleft surgeries performed over the thirteen-year period of study. The male to female ratio was 1.2:1. The mean age of the patients was 58.08 ± 99.65 months. The median age and weight of the patients were 11 (IQR:5-65) months and 8 (IQR: 5.5-16) kg respectively. Over half (n = 184, 58.6%) of the cleft surgeries were for primary repairs of the lip and a third (n = 94, 29.9%) were surgeries for primary repairs of the palate. Millard's rotation advancement flap was the commonest lip repair technique with Fishers repair introduced within two years into the end of the study. Bardachs two flap palatoplasty has replaced Von Langenbeck palatoplasty as the commonest method of palatal repair. The prevalence of late primary cleft lip repair was about a third of the patients having primary cleft lip surgery while the prevalence of late palatal repair was more than two thirds of those who received primary palatoplasty. Compared with children who had bilateral cleft lip, children with unilateral cleft lip had a significantly increased risk of late primary repair (Adj HR: 22.4, 955 CI: 2.59-193.70, P-value = 0.005). CONCLUSION: There has been a change from Von Langenbeck palatoplasty to Bardachs two-flap palatoplasty. Intra-velar veloplasty and Fisher's method of lip repair were introduced in later years. There was a higher risk of late primary repair in children with unilateral cleft lip.

Experience with Liposuction for the Treatment of Subcutaneous Lipoma: A Case Series from a Tertiary Health Institution in Nigeria.

Background: Lipomas are the commonest benign tumours in the body. Treatment is often by excision biopsy. Liposuction has traditionally been used for body sculpturing, but recently, it was introduced for the operative management of lipomas. The aim of this study was to present our experience with liposuction lipectomy-assisted lipoma aspiration in terms of its efficacy, complications, risk of recurrence, and patient satisfaction. Materials and Methods: A retrospective review of 16 patients with solitary or multiple lipomas managed with liposuction over a 5-year period was done. All the patients had a prior fine needle aspiration cytology, which was reported as benign. Informed consent was obtained, and the procedures were performed as a day case under tumescent anaesthesia. Lipo-aspiration was done with manual liposuction device. The patients were discharged on oral analgesics and antibiotics. Results: Sixteen patients (10 females and six males) with 21 lesions were managed. The median age was 43 years (23-66 years). All the patients had satisfactory outcomes. The procedure was converted to open-excisional surgery in one patient, and the histology was reported as fibro lipoma. Friction burn at the cannula site occurred in one patient, which subsequently healed with scars. No recurrence was reported in any of the patients. Conclusion: In well-selected patients, liposuction-assisted lipectomy may have an advantage over the classical open technique. All patients should have a minimum investigation of fine needle aspiration cytology because of the risk of atypical lipomas or liposarcoma, which might have similar features as subcutaneous lipoma.

Plasma Zinc Levels in Patients with Chronic Leg Ulcers at University College Hospital, Ibadan, Nigeria.

BACKGROUND: Chronic leg ulcers are defects in the skin below the level of knee persisting for more than six weeks and shows no tendency to heal after three or more months. Zinc is a necessary component of several DNA & RNA polymerases and transferases essential for cell proliferation. Zinc deficiency is known to retard wound healing by preventing cellular mitosis and disturbance of fibroblast function and collagen synthesis. This study compares zinc levels in patients with chronic leg ulcers with apparently healthy individuals. METHODS: Five milliliters of venous blood samples was taken from twelve patients with chronic leg ulcers. Five milliliters of venous blood samples was also taken from a control group, who do not have chronic leg ulcers, but are matched with the cases in age (± 5 yr), sex, socioeconomic status and body mass index (± 3 kg/m2). Plasma zinc levels was determined by atomic absorption spectrophotometry. Principal exposure include the socio-demographic characteristics of patients, duration of symptoms before presentation, signs of ulcer-site, number, size, depth, base, edge, presence of discharge, enlarged lymph nodes and local neurovascular integrity. The outcome variables include plasma levels of biochemical markers measured -Zinc, serum albumin, total protein. RESULTS: The plasma zinc levels was significantly lower (P<0.01) in patients with chronic leg ulcer (92.808±16.689 µg/dl) as compared with control subjects (109.413 ± 9.304 µg/dl). There was no statistical difference in albumin and protein levels in both groups. CONCLUSION: Patients with chronic leg ulcers have significantly lower plasma zinc levels than apparently healthy individuals.

Glycerolised Skin Allografts for Extensive Burns in Low- and Middle-income Countries.

Introduction: There has been a significant improvement in the outcome of treatment of large surface area burns in developed countries. A major contributory factor is an early excision and skin grafting of burn wounds. The initial coverage of large surface area deep burn wounds requires the use of temporary skin substitutes such as allografts due to limited skin autografts. Cadaveric skin allografts are the commonest source of skin allografts in use; however, there may be religious, cultural, cost, or other factors mitigating its availability and routine use in low- and middle-income countries (LMICs). Human skin allografts may be used fresh or stored in tissue banks to ensure its ready availability. The purpose of this review is to promote glycerolised skin allografts as a means of skin preservation in low-resource countries above other modalities cryopreservation due to its cost advantages and relative ease of operation. Materials and Methods: A literature search for articles related to human skin allograft use in burn care, skin banks, and glycerolised skin allografts in LMICs was done using PubMed, EMBASE, and Web of Science databases. The key words used were 'allograft' and 'burn' with a filter in the search for human studies. The relevant references in the articles obtained were also searched for and included in the review. Results: Sixty-three journal articles were reviewed for contents in line with the objectives of this study. Conclusion: Glycerolised skin graft is a viable option for coverage of extensive burns in LMICs.

Concentric mastopexy for pubertal gynaecomastia in an African child.

Gynaecomastia refers to the enlargement of the male breast. It can be psychologically disturbing for children and adolescents as well as adults. While in children watchful waiting is advised as the gynaecomastia could resolve, surgical intervention becomes necessary where there is significant psychosocial disturbance. We present a case of an African child whose quality of life improved after correcting the gynaecomastia. We highlight the concentric mastopexy method in the surgical management of gynaecomastia.

Pattern of congenital hand anomalies at a tertiary plastic surgery service in South-Western Nigeria: A 10-year, cross-sectional retrospective review.

CONTEXT: Although congenital hand anomalies are among the more common musculoskeletal anomalies worldwide, we do not know its prevalence in our practice. AIMS: The aim of the study was to determine the pattern of congenital hand anomalies presenting to our tertiary plastic surgery outpatient service in South-Western Nigeria. MATERIALS AND METHODS: This is a cross-sectional retrospective analysis of outpatient cases of congenital hand anomalies presenting over a 10-year period. Descriptive and inferential statistics were performed using frequencies, Student's t-test and Chi-square as appropriate. The data were analysed using IBM SPSS Statistics 23.0. The statistical significance value was set at P < 0.05. RESULTS: One hundred and twenty-two cases were identified. The highest number of cases was seen in the year 2012, 23 patients (19.3%). There was a male preponderance of 66 patients (55.1%). Thirty-two patients (26.2%) presented as neonates and 36 (29.5%) as infants. Bilateral anomalies were seen in 67 patients (54.9%). The most common anomaly was failure of differentiation, 88 patients (72.1%) followed by duplication, 26 patients (21.3%). Syndactyly with 43 patients (35.2%) was the most common anomaly under failure of differentiation. No significant associations were found between the type of anomaly and gender or laterality. CONCLUSIONS: Syndactyly was the most common congenital hand anomaly in this study. There was a preponderance of bilateral involvement in both syndactyly and polydactyly.

Time to return to school in child and adolescent burn patients from a sub-Saharan tertiary hospital.

BACKGROUND: Africa, with the largest number of paediatric burns needs to focus more attention on paediatric burn survivors. Burn injury truncates schooling in child and adolescent burn patients. The aim of this study was to determine the time to return to school and factors influencing this in child and adolescent burn patients. METHODOLOGY: A cross-sectional study of child and adolescent patients aged one to nineteen years that had been managed for bun injuries. Demographic variables were obtained from archived computerized data. Phone interviews were conducted to obtain time to return to school variables using a questionnaire. Descriptive statistics, students t test, fishers exact test and Chi square test were uses as appropriate for analysis on data on SPSS version 23. A p value <0.05 was considered statistically significant. RESULTS: Thirty-one patients were recruited for the study. There was a female preponderance, 19 (61.3%). The mean age of the patients was 7.2 (±5.3) years. Scald injuries were the commonest [N = 14 (45.2%)] cause of burn. The mean Total Burn Surface Area (TBSA) was 14.1 (±12.0)%. The mean length of hospital stay was 30 (±59) days. The mean time to return to school after discharge from the hospital was 8.4 (±8.7) weeks. The occurrence of burns on the trunk was significantly (p = 0.048) associated with an earlier time to return to school. CONCLUSION: Time to return to school from burn injury and from discharge in child and adolescent burn survivors in this study are at least three times longer than previous studies. The burn care team needs to consider school re-entry programs for these children.

Pediatric keloids: A 6-year retrospective review.

BACKGROUND/OBJECTIVES: Keloids are reportedly rare at the extremes of life. We sought to describe the epidemiology of pediatric keloids seen at the plastic surgery outpatient department of the University College Hospital, Ibadan. METHODS: We retrospectively reviewed all children younger than 19 years who presented with nonburn keloids between 2008 and 2014. Data were obtained on age; duration, size, and location of the keloid; family history; mode of treatment; and outcome. Outcome variables were recurrence and wound complications. Data were analyzed using the Pearson chi-square test for discreet variables and the independent-sample t test for continuous variables. P < .05 was taken as statistically significant. RESULTS: Within the review period, 304 patients presented with keloids, of whom 40 (13.1%) were younger than 19 years. There was a female preponderance (n = 23, 57.5%). The mean age at onset of the keloid was 9.3 years (range 3 months-18 years). Thirty (75%) patients had keloids in the head and neck region. Keloids were sporadic in 31 (77.5%) patients. Nineteen (47.5%) patients had multimodal treatment for keloid. The recurrence rate was 20%. Recurrence was significantly associated with the size of the lesion (P = .003). CONCLUSION: Keloids during childhood are not rare. More attention should be paid to the management of keloids in this age group.

Identification of ASAH1 as a susceptibility gene for familial keloids.

Keloids result from abnormal proliferative scar formation with scar tissue expanding beyond the margin of the original wound and are mostly found in individuals of sub-Saharan African descent. The etiology of keloids has not been resolved but previous studies suggest that keloids are a genetically heterogeneous disorder. Although possible candidate genes have been suggested by genome-wide association studies using common variants, by upregulation in keloids or their involvement in syndromes that include keloid formation, rare coding variants that contribute to susceptibility in non-syndromic keloid formation have not been previously identified. Through analysis of whole-genome data we mapped a locus to chromosome 8p23.3-p21.3 with a statistically significant maximum multipoint LOD score of 4.48. This finding was followed up using exome sequencing and led to the identification of a c.1202T>C (p.(Leu401Pro)) variant in the N-acylsphingosine amidohydrolase (ASAH1) gene that co-segregates with the keloid phenotype in a large Yoruba family. ASAH1 is an acid ceramidase known to be involved in tumor formation by controlling the ratio of ceramide and sphingosine. ASAH1 is also involved in cell proliferation and inflammation, and may affect the development of keloids via multiple mechanisms. Functional studies need to clarify the role of the ASAH1 variant in wound healing.

Study of streptomycin-induced ototoxicity: protocol for a longitudinal study.

Hearing impairment is due to various causes including ototoxicity from aminoglycosides. The susceptibility to aminoglycosides increases in the presence of certain mitochondria gene mutations. There is unrestrained use of aminoglycosides in many developing nations which may worsen the burden of hearing impairment in these countries but there is lack of data to drive required policy changes. Streptomycin (an aminoglycoside) is part of the drug regimen in re-treatment of tuberculosis. Exploring the impact of streptomycin ototoxicity in tuberculosis patients provides a unique opportunity to study aminoglycoside ototoxicity within the population thus providing data that can inform policy. Also, since streptomycin ototoxicity could adversely affect treatment adherence in tuberculosis patients this study could enable better pre-treatment counseling with subsequent better treatment adherence. Patients on tuberculosis re-treatment will be recruited longitudinally from Direct Observation Therapy-Short course centers. A baseline full audiologic assessment will be done before commencement of treatment and after completion of treatment. Early detection of ototoxicity will be determined using the American Speech and Hearing Association criteria and genetic analysis to determine relevant mitochondria gene mutations will be done. The incidence of ototoxicity in the cohort will be analyzed. Both Kaplan-Meier survival curve and Cox proportional hazards tests will be utilized to determine factors associated with development of ototoxicity and to examine association between genotype status and ototoxicity. This study will provide data on the burden and associated predictors of developing aminoglycoside induced ototoxicity. This will inform public health strategies to regulate aminoglycoside usage and optimization of treatment adherence and the management of drug-induced ototoxicity among TB patients. Furthermore the study will describe mitochondrial gene mutations associated with ototoxicity in the African population.

A Quasi-experimental Study to Assess an Interactive Educational Intervention on Nurses' Knowledge of Pressure Ulcer Prevention in Nigeria.

Educational intervention programs are an important element to improve nurses' knowledge of pressure ulcer (PU) prevention. Various teaching methods have been used with diverse results but none have been analyzed in Nigeria. A quasi- experimental study using a pretest/post test design was conducted among 193 registered nurses with >6 months experience who worked in purposefully selected wards (neuroscience, orthopedics, renal, and cardiac) in 3 teaching hospitals to examine the level of knowledge retention after interactive instruction. Participants were randomized to intervention (IG, n = 127 from 2 hospitals) and control (CG, n = 66 from 1 hospital) groups; the IG was provided a 5-day, face-to-face interactive lecture, and the CG engaged in a 1-day, 4-hour discussion of PU prevention practices. The Pressure Ulcer Knowledge Tool, a 47-item questionnaire in which a correct answer = 1 point and an incorrect/"I don't know" answer = 0 (maximum score 47), was used to assess and compare knowledge retention at 3 time points: baseline (T1), immediately after instruction (T2), and after 3 months (T3). Three trained research assistants assisted with registration of participants and distribution and collection of the questionnaires. All questionnaires were retrieved at T1 before the intervention be- gan. Respondents were encouraged to respond to all questions. Data were analyzed using t-test and ANOVA (P = 0.05). At T1, knowledge scores were comparable between the IG and CG (32.5 ± 4.2 and 30.8 ± 5.0 for IG and CG, respectively). At T2, knowledge scores increased significantly only in the IG to 40.7 ± 3.4 (d = 1.94, P less than 0.05). The mean difference between T1 and T2 was -8.2 ± 5.4, t = -17.0, P = 0.000. Similarly, mean scores increased significantly from T2 to T3 in the IG (mean= -2.0 ± 5.5, t = -4.1, P = 0.000); scores in the CG were -6.2 ± 7.2, t = -6.3 (P = 0.000). A face-to-face interactive lecture was shown to be an effective method of program delivery for nurses; other educational methods should be assessed and their effects on PU prevention practices and outcomes evaluated.

Point Prevalence of Chronic Wounds at a Tertiary Hospital in Nigeria.

BACKGROUND: Chronic wounds are a drain on resources both for the patient and health institution. Management of chronic wounds based on evidence-based practice requires baseline data for adequate planning. OBJECTIVES: This study was carried out to determine the point prevalence of chronic wounds in a tertiary hospital (University College Hospital, Ibadan, Nigeria) and utilize this information for subsequent wound care planning. METHODS: The study was carried out within a 1-month period and included all patients seen in the hospital with chronic wounds. The data obtained was entered into a designed form and was subsequently analyzed. RESULTS: There were 48 patients with 78 wounds representing approximately 11% of patients seen in the Department of Plastic, Reconstructive, and Aesthetic Surgery each month. Their ages ranged from 3 months to 80 years; the median age was 48 years. The male to female ratio was 1.6 to 1. The duration of the wounds ranged from 6 weeks to 780 weeks; the median duration of the wounds was 10 weeks. The area of the wounds ranged from 1 cm(2) -1,248 cm(2) (median 24 cm(2)). The most common chronic wounds were diabetic wounds, followed by pressure ulcers, postinfection ulcers, posttraumatic ulcers, burn wounds, malignant ulcers, and venous ulcers. CONCLUSION: The point prevalence data serves as a basis for wound care planning. This, in turn, should result in improved wound management grounded in evidence-based practices.