Browsing by Author "Muhumuza, Joshua"

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    Factors associated with early inhospital adverse outcome following surgery for acute appendicitis in Uganda: a multicenter cohort
    (BioMed Central, 2024-05) Farhan, Sharif Yusuf; Abraha, Demoz; Edyedu, Isaac; Molen, Selamo Fabrice; Mauricio, William; Odong, Samuel Oledo; Mugeni, Michael; Muhumuza, Joshua
    INTRODUCTIONSurgery for acute appendicitis has been associated with significant morbidity. This study aimed to determine the factors associated with early inhospital adverse outcomes following surgery for acute appendicitis in Uganda.METHODSThis was a multicentre, prospective cohort in which early inhospital outcome following surgery for acute appendicitis was assessed at 4 regional referral hospitals in Uganda. The occurrence of complications during the admission period was documented as well as the length of hospital stay. Factors associated with adverse outcomes were determined using Poisson regression.RESULTSOf the 102 patients who underwent surgery for acute appendicitis, the majority were males 79(77.5%) with a mean age of 23.8(SD = 12.5) years. The perforated appendix was seen in 26 (25.5%) patients. Post-operative complications occurred in 21(20.6%) with the commonest being surgical site infection in 19(18.6%) patients. The median length of hospital stay was 3(IQR = 3-4) days with 43(42.2%) staying in hospital for more than 3 days. The presence of anemia (Hb < 8) (aRR = 1.376, CI = 1.159-1.634, P =  < 0.001) and having a perforated appendix (aRR = 1.263, CI = 1.026-1.555, P = 0.027) were independently associated with occurrence of complications while being HIV positive (aRR = 1.379, CI = 1.105-1.721, P = 0.005) and having a perforated appendix (aRR = 1.258, CI = 1.019-1.554, P = 0.033) were independently associated with prolonged hospital stay.CONCLUSIONCommunity education about early presentation is still required in order to reduce the number of patients that present late which should, in turn, reduce the risk of complications and length of hospital stay. MEDLINE - Academic
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    Minimal Idle-Listen Centralized Scheduling in TSCH Wireless Sensor Networks
    (IEEE, 2018) Nsabagwa, Mary; Muhumuza, Joshua; Kasumba, Robert; Otim, Julianne Sansa; Akol, Roseline
    Centralized scheduling in IEEE 802.15.4e Time Slotted Channel Hopping (TSCH), uses a centralized entity to perform scheduling of nodes in cells to generate collision-free communication amongst neighboring nodes. Although many centralized scheduling algorithms have been proposed, they still suffer from idle-listening, a state in which nodes stay awake without transmitting or receiving data, which causes wastage of the limited sensor node energy. This paper proposes a minimalidle-listen centralized 6TiSCH scheduling algorithm (MILS) with the aim of minimizing idle listening amongst sender nodes. MILS is formulated as a Constraint Satisfaction Problem (CSP) problem, which schedules relay links in parallel with leaf links while maximizing the channels available in order to minimize waiting at bottleneck regions. Minimizing the number of packets in nodes close to the sink reduced delays by approximately 19% and idle-listening by 50% in MILS compared to OTF.