A semitransparent shape memory polymer
(SMP):silver nanowire (AgNW)
composite is demonstrated to be capable of low-temperature actuation,
thus making it attractive for wearable electronics applications that
require intimate contact with the human body. We demonstrate that
the SMP:AgNW composite has tunable electrical and optical transparency
through variation of the AgNW loading and that the AgNW loading did
not significantly change the mechanical behavior of the SMP. The SMP
composite is also capable of electrical actuation through Joule heating,
where applying a 4 V bias across the AgNWs resulted in full shape
recovery. The SMP was found to have high strain sensitivity at both
small (<1%) and large (over 10%) applied strain. The SMP could
sense strains as low as 0.6% with a gauge factor of 8.2. The SMP composite
was then utilized as a touch sensor, able to sense and differentiate
tapping and pressing. Finally, the composite was applied as a wearable
ring that was thermally actuated to conformably fit onto a finger
as a touch sensor. The ring sensor was able to sense finger tapping,
pressing, and bending with high signal-to-noise ratios. These results
demonstrate that SMP:AgNW composites are a promising design approach
for application in wearable electronics.
To compare single dose preoperative antibiotic versus five days antibiotic course in preventing surgical site infection for the pediatric inguinal herniotomy.The present study was conducted on 100 patients of elective inguinal herniotomy from January 2019 to April 2020 and compared on the basis of single dose preoperative antibiotic versus five days antibiotic course. All the patients were evaluated on the 3rd, 7th and 28th post-operative period and instructions were given to the guardians about wound care and to attend for early follow up if any signs & symptoms of wound infection appear.50% of the patients were treated with prophylactic single dose antibiotic, i.e. inj. Ceftriaxone (30 mg/kg/dose) at the time of induction only and rest 50% were treated with inj. Ceftriaxone(30mg/kg/dose) at the time of induction as well as postoperatively at night followed by four days of oral antibiotic with Syr/Tablet. Cephalexin (25mg/kg/day) three times daily for another 4 days.Surgical Site Infection (SSI) in Group-B (4.0%) was higher than that of Group-A (2.0%) on day 3 but it was not significant (p=0.40). There was no significant difference in health status of the patients of the two groups when compared on post-operative day 7 and day 28 (p=0.99, p=0.99 respectively).Implementation of single dose antibiotic prophylaxis regimes tailored to the prevalent organisms in the institution can result in enormous savings, as the study shows significant reduction in hospital stay with no significant increase in incidence of SSI.
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