Annales françaises d'anesthèsie et de rèanimation
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Ann Fr Anesth Reanim · Jan 1998
Review[Frequency, intensity, development and repercussions of postoperative pain as a function of the type of surgery].
Type of surgery is the most important factor conditioning intensity and duration of postoperative pain. Thoracic and spinal surgery are the most painful procedures. Abdominal, urologic and orthopedic surgery lead to severe postoperative pain. ⋯ The surgical procedure is the major determinant of metabolic and psychologic postoperative deterioration. Adequate pain relief allows postoperative rehabilitation and physiotherapy programmes after abdominal and orthopaedic surgery. This could be expected to reduce hospital stay and improve convalescence.
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Ann Fr Anesth Reanim · Jan 1998
Review[Repercussion of postoperative pain, benefits attending to treatment].
Physiological responses to postoperative acute pain may impede organ functions (cardiovascular, pulmonary, coagulation, endocrine, gastrointestinal, central nervous system, etc). Pain alleviation improves patient's comfort, but also may minimise perioperative stress response, physiological responses and postoperative organ dysfunction, assist postoperative nursing and physiotherapy, enhance clinical outcome, and potentially shorten the hospital stay. Potent postoperative analgesia, especially by epidural route, may be associated with reduction in incidence and severity of many perioperative dysfunctions. ⋯ On balance, the mode of acute pain relief decreases adverse physiological responses and many intermediate outcome variables; however, there is inconclusive evidence that it affects clinical outcome. Major advances in postoperative recovery can be achieved by early aggressive perioperative care, including potent analgesia, early mobilisation and oral nutrition. As a result, the hospital stay may be shortened.
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The question as to whether the head and trunk of neurosurgery patients should be elevated remains controversial. This question is particularly important when intracranial hypertension is present. Head up position may have beneficial effects on intracranial pressure (ICP) via changes in mean arterial pressure (MAP), airway pressure, central venous pressure and cerebro spinal fluid displacement. ⋯ In most patients with intracranial hypertension, head and trunk elevation up to 30 degrees is useful in helping to decrease ICP, providing that a safe CPP of at least 70 mmHg or even 80 mmHg is maintained. Patients in poor haemodynamic conditions are best nursed flat. CPP is thus the most important factor in assessment and monitoring when considering head elevation in patients with increased ICP.
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Pain is a subjective feeling; its assessment is therefore difficult, and no "gold standard" method exists for humans. Major improvements have, however, been made in the last decade by widespread acceptation of the concept of pain evaluation and widespread use on surgical wards. Evaluation by the patient himself is the rule (unless communication is impaired), as assessment of pain by nurses or doctors systematically leads to underestimation (which also occurs with observational scales). ⋯ Although scientific validation is difficult, VAS seems the most accurate and reproducible scale. Post-operative pain should be assessed several times a day in every patient, at rest and in dynamic conditions (cough, movement) and should focus on present pain rather than on pain in the previous hours. Assessment of pain is essential before quality-assurance programmes can be implemented.
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The assessment of postoperative pain and analgesic efficacy is essential as pain levels and morphine requirements are not predictable. Self-assessment with unidimensional methods (such as the visual analogue pain scale, the numerical rating scale and the verbal rating scale) is the rule for adults and children more than 5 years of age. The former is a validated method and the most accurate and reproducible scale. ⋯ Finally, morphine consumption with PCA is also an indirect pain assessment method. Postoperative pain should be assessed several times a day in every patient, starting in the recovery room and prolonged during hospital stay. Pain should be measured at rest and in dynamic conditions by the medical and paramedical team.