PERINEAL CARE
Classification of perineal tears
Perineal tears are common following vaginal delivery. There are classified as follows:
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1st degree – tear involving vaginal mucosa or perineal skin only
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2nd degree – involves perineal muscles
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3rd degree – involves external anal sphincter (EAS). This is further divided into 3A (less than 50% of EAS), 3B (more than 50% EAS) and 3C (full thickness anal sphincter tear)
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4th degree – includes rectal mucosa
Obstetric risk factors for anal sphincter injury
Maternal factors
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Primiparity
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Instrumental delivery – higher with forceps than vacuum extraction
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Prolonged second stage of labour
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Epidural analgesia
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Midline episiotomy
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Previous anal sphincter injury
Fetal factors
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Birth weight greater than 4kg
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Shoulder dystocia
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Persistent occipito-posterior position during labour
3rd and 4th degree tears are repaired in theatre under regional anaesthesia.
A course of antibiotic and laxatives is usually prescribed in these circumstances. Give NSAIDS for analgesia if not contraindicated.
Postnatal physiotherapy for 6 – 12 weeks is offered to help prevent incontinence
Complications of perineal tears
Early
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Haemorrhage
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Pain - may interfere with maternal-neonate bonding
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Wound infection / breakdown
Late
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Faecal incontinence
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Urinary incontinence
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Persistent perineal pain / dyspareunia
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Fistula formation
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Psychological sequelae
Care of the perineum
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Pelvic floor exercises and analgesia are important
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Use warm clean water to clean perineum. No difference in healing when alternative remedies such as adding salt and antiseptics to water are used.
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Wash perineum after every visit to the toilet
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Do not use hair dryer over perineum. Use of toilet paper to pad dry the stitches is adequate
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To help keep area dry, the use of breathable materials e.g. cotton briefs is better than synthetic materials
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If using sanitary pads, change them frequently to help prevent infection
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If there is swelling, can use cold ice packs to help reduce swelling and discomfort
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Local anaesthetic creams are available at chemists but are expensive
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