Department of Anaesthesia, Intensive Care and Pain Medicine, Mater Misericordiae University Hospital, Eccles Street, Dublin 7, Ireland
* Corresponding author. E-mail: crina{at}ireland.com
Accepted for publication July 11, 2005.
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Abstract |
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Keywords: anaesthetic techniques, regional, paravertebral ; sympathetic nervous system, ganglion block
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Introduction |
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Case report |
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After operation, the patient received a continuous infusion of levobupivacaine 0.1% at 0.15 ml kg1 h1, which was administered via a Perfusor® Compact syringe pump (B. Braun Medical, Sheffield, UK). Pain, assessed on a 100 mm visual analogue scale in the recovery room and every hour after surgery, was zero on movement of the ipsilateral arm. Four hours after surgery, ward staff noticed hemifacial colour asymmetry. In addition to the left ipsilateral classical signs of Horner syndrome (ptosis, miosis, enophthalmos and anhidrosis), there was contralateral right hemifacial flushing and sweating with a well-defined demarcation in the midline. Skin temperature, measured using a 400 Series skin temperature sensor (DeRoyal Europe, Kells, Ireland), was 35.5°C on the right side of the forehead compared with 32.9°C on the left. There was no obvious upper limb abnormality of colour and temperature (not measured). Bilateral hand grip and sensation were normal. The patient was fully alert and comfortable and vitals signs were within normal limits. Over the next 6 h, the unilateral facial flushing subsided, the Horner syndrome persisting until the following day.
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Discussion |
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In 1988, Lance and colleagues1 first used the term harlequin syndrome to describe the sudden onset of unilateral facial flushing and sweating in hot temperatures, extreme emotion or after strenuous exercise in a case series of patients. Harlequin syndrome has been reported subsequently not only as an independent primary complaint in sporting or hard physical work situations, but also associated with other autonomic system disturbances in acquired and congenital Horner syndrome, trauma, stroke and mediastinal tumours.3 6 Unilateral facial flushing and sweating may be also encountered in a number of medical conditions, such as idiopathic hyperhidrosis7 and Frey's syndrome8 (gustatory flushing syndrome). The Chinese ethnic group is predisposed to upper body and face redness after alcohol9 due to genetic variation in alcohol-metabolizing enzymes.
Drummond and colleagues1 10 11 investigated the vasomotor, sudomotor and oculomotor responses in patients with a sympathetic deficit or pharmacologically induced blockade of the sympathetic pathway to the face. By exposing these patients to environmental challenges (heat, emotional embarrassment, gustative stimuli), they demonstrated that the conventional sympathetic pathway to the face encompasses sympathetic vasodilator fibres which mediate facial blood vessels dilation in response to heat and emotion, and that a lesion anywhere along the sympathetic pathway to the face impairs thermoregulatory flushing and sweating at the denervated site in response to body heating and emotion.
The upper thoracic sympathetic nerves branch off as white rami communicantes that enter the corresponding ipsilateral thoracic ganglia of the sympathetic trunk, through which they ascend into the neck and synapse in the superior cervical ganglion (Fig. 1). The pupillomotor fibres leave the spinal cord at T1, while the sudomotor and vasomotor fibres exit at T2T3. The postganglionic fibres from the rostral part of the superior cervical ganglion project into the internal carotid nerve which brings sympathetic innervation to the eyes and forehead. More caudal postganglionic fibres project into the external carotid nerve, providing vasomotor and sudomotor innervation of the jaw. Fibres to the cheeks travel by either route (Fig. 1).
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Harlequin syndrome has been reported only rarely in the perioperative setting. A 9-month-old infant, premature at birth, with a past history of surgical correction of a complex congenital heart disease and tracheostomy, underwent Nissen fundoplication and gastrostomy for recurrent aspiration pneumonitis.12 Intraoperatively, the patient developed transient, 1-h duration, well-demarcated plethora of the right neck and face. The authors presented the colour change as a clinical curiosity and no explanation could be attributed to the event. Contralateral hemifacial erythema was also noticed in a 2-yr-old child undergoing surgical removal of a cystic hygroma under general anaesthesia and local infiltration of the skin on the operative side.13 The unilateral flushing was exacerbated by crying or coughing. In another case,14 a 3-month-old child developed acquired ipsilateral Horner syndrome secondary to a neuroblastoma of the left cervical sympathetic chain. The surgical removal of the tumour was followed by a persistent heat- and crying-exacerbated flushing of the entire body and loss of thermoregulatory vasodilator sympathetic response on the left side of the face, which appeared very pale. The autonomic dysfunction was confirmed by skin conductance response polygraphy. In the above paediatri cases, the harlequin appearance seems to be related to surgical trauma of the cervical sympathetic pathways after difficult dissection of neck masses.
In adults, the only published report of perioperative transient harlequin syndrome was associated with the uneventful first-pass cannulation of the right internal jugular vein in a patient undergoing laparotomy for an intra-abdominal collection.15 No local anaesthetic infiltration was used. The patient had previously had right internal jugular vein cannulation and subsequent removal of a Hickman catheter. Neuropraxia of the cervical sympathetic supply to the face during repeated right neck cannulation was proposed as an explanation.
In conclusion, we observed contralateral facial flushing with ipsilateral Horner syndrome after paravertebral anaesthesia. This was due to a normal or excessive vasodilatory, thermoregulatory response to heat or emotion by an intact sympathetic pathway on the erythematous (right) side together with relative pallor of the left side because of high thoracic sympathetic blockade. The occurrence of harlequin syndrome after paravertebral anaesthesia appears to be transient and requires only explanation and reassurance.
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References |
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