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Related Concept Videos

Blind Procedures02:07

Blind Procedures

Ideally, the people who observe and record the children’s behavior are unaware of who was assigned to the experimental or control group, in order to control for experimenter bias. Experimenter bias refers to the possibility that a researcher’s expectations might skew the results of the study. Remember, conducting an experiment requires a lot of planning, and the people involved in the research project have a vested interest in supporting their hypotheses. If the observers knew which child was...
Blinding01:11

Blinding

Blinding is a commonly used method of not telling participants which treatment a subject is receiving. Blinding is a critical part of a randomized control trial or RCT. It reduces the bias that affects the results. In an RCT, blinding is used in the form of a placebo. A placebo effect occurs when untreated subjects falsely believe they have received the treatment and report improved symptoms. A placebo or a dummy treatment is administered to subjects to negate the bias caused by such an effect.

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Related Experiment Video

Updated: Jul 17, 2026

Application of Straight-needle, Three-tailed, Knot-free, Peritoneal Sutures in Laparoscopic Transabdominal Preperitoneal Hernia Repair
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Negative Pressure Dressing Versus Conventional Passive Dressing in Pilonidal Surgery: A Randomized Controlled Trial.

Nicholas Ensor1, Sarah Martin2, Annette Chang1

  • 1Department of Paediatric Surgery, Urology & Surgical Simulation, Monash Children's Hospital, Melbourne, Australia.

The Journal of Surgical Research
|October 11, 2024
PubMed
Summary

Negative pressure wound therapy (NPWT) did not reduce surgical wound dehiscence (SWD) rates in pilonidal sinus disease (PSD) excisions. This study suggests NPWT is not a routine preventative measure for PSD surgical wounds.

Keywords:
DehiscenceKarydakisNegative pressure wound therapyPilonidal sinusPrimary closure

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Area of Science:

  • Surgical innovation and wound healing research.
  • Clinical trial methodology in surgical outcomes.

Background:

  • Pilonidal sinus disease (PSD) surgery has high complication rates, including surgical wound dehiscence (SWD), reaching up to 44%.
  • Negative pressure wound therapy (NPWT) is a potential intervention to mitigate SWD in high-risk surgical wounds.

Purpose of the Study:

  • To evaluate the efficacy of NPWT compared to conventional passive (CP) dressings in reducing SWD rates after PSD excision with off-midline primary closure.
  • To assess the impact of NPWT on patient quality of life and return to normal activities post-PSD surgery.

Main Methods:

  • A prospective, crossover randomized controlled trial involving 50 patients (12-40 years) with PSD.
  • Participants were randomized to receive either NPWT (SNAP) or CP (Primapore or Opsite) dressings.
  • Follow-up included regular wound assessments and a 2-month postoperative online survey for quality of life outcomes.

Main Results:

  • The overall dehiscence rate was 42% (21/50), with 48% in the NPWT group and 36% in the CP group (P=0.6).
  • No significant differences were observed in deep SWD rates, duration to wound healing, or time to return to school/work, sitting normally, or physical activity between the groups.
  • SWD was associated with increased excision dimensions in the NPWT group only (P=0.03).

Conclusions:

  • NPWT did not demonstrate improved outcomes in terms of surgical wound dehiscence or quality of life for PSD excisions with off-midline primary closure.
  • The findings do not support the routine use of NPWT as a preventative measure for these specific surgical procedures.
  • Further research may be warranted, but current evidence suggests limited benefit in this patient population.