Large numbers of patients with abdominal pain present to their general practitioners and emergency departments every year. Most require no specific medical intervention but some will require urgent hospital admission. The elderly and paediatric patient present particular challenges. The very young often give a poor history or can very quickly deteriorate. The elderly may have a very complicated medical history and misleading signs. A longitudinal study found that 50% of elderly patients (65 or over) with abdominal pain required admission.1 Because of the difficulty of assessment in these groups of patients you should have a lower threshold for referral. Show
Abdominal pain has numerous causes but it is not necessary to reach a specific diagnosis. The aim is to decide on a management plan, to know when to monitor a patient at home, and to rule out the more serious pathology. Most patients can be adequately assessed by the simple techniques described and an accurate plan formed for the patients further management. This article will focus on initial assessment and management and not on specific conditions. There are numerous texts that will give the basic outline of symptoms for different pathologies.2,3 More than 30 women die each year in the UK as a direct consequence of pregnancy. The Confidential Enquiry into Maternal Deaths 1997–994 stated that “Women are still dying of potentially treatable conditions where the use of simple diagnostic guidelines may help to identify conditions such as ectopic pregnancy, sepsis and pulmonary embolism”. Key points
OBJECTIVES
THE PRIMARY SURVEYAll patients should be assessed using the ABCD approach. Abdominal pain can be immediately life threatening (primary survey positive). Such cases need to be identified early so that appropriate care can start immediately (box 1). Box 1 Life threatening causes of abdominal pain
One unusual cause of shock-like syndrome in pregnancy is supine hypotension. If a pregnant woman is laid on her back for a prolonged period the uterus obstructs the inferior vena cava resulting in a decrease in venous return, cardiac output, and hypotension. If the uterus is palpable above the umbilicus, lie the patient in the left lateral position. Key point
Primary survey positiveThese patients present in a variety of ways but airway and breathing assessment requires the same approach as in any other life threatening situation. Shock is the main immediately life threatening problem in patients with abdominal pain (box 2). Box 2 Common presentations of “primary survey positive” patients
Shock can be attributable to either hypovolaemia or sepsis. En route to hospital obtain intravenous access and draw blood for cross matching. Remember to complete the patient details on the blood specimen tube. No intervention should delay transfer to definitive medical care. Intravenous fluid resuscitation in abdominal haemorrhage should be based on the principle of hypotensive resuscitation, aiming to give enough fluid to maintain a radial pulse.5 Key point
These patients are likely to be in pain. Intravenous opioid analgesia may be given en route but monitor the blood pressure closely and titrate small doses in unstable patients. Evidence shows that pain relief does not affect subsequent clinical assessment and that it removes damaging physiological stresses and improves accuracy of examination.5 Key points
Box 1 summarises the most common life threatening problems. However, many common abdominal problems such as acute appendicitis can be life threatening if not promptly diagnosed and treated. This emphasises the importance of reassessment of patients with continuing or worsening symptoms. Consider potentially serious medical conditions not directly related to the gastrointestinal tract that can also present as abdominal pain (box 3). A focused history and examination will help in identifying such cases (see below). Box 3 Medical conditions presenting with abdominal pain
Specific potential threats to life in women (see box 4)Ectopic pregnancy classically presents with vaginal bleeding and abdominal pain, but there may also be associated internal bleeding that may give rise to shoulder tip pain. The degree of shock may be disproportional to the observed blood loss. The woman may be unaware of pregnancy and may not give a history of a missed period. These patients need fast transport to an appropriate unit. Obtain venous access en route if possible. Give enough fluids to maintain the radial pulse and high flow oxygen. Alert the receiving unit and ensure the gynaecologist is aware. Box 4 Potential treats to life in women
An incomplete miscarriage may result in products of conception caught in the cervix that leads to profound vagal stimulation with bradycardia and shock. These patients need urgent hospital admission because removal of these products will lead to a rapid clinical improvement and reduction in bleeding. Any tissue passed should accompany the woman to hospital. Pulmonary embolism is still responsible for a number of maternal deaths. Have a low index of suspicion and refer pregnant women with shortness of breath or pleuritic chest pain. Toxic shock syndrome is caused by invasive staphyloccal or streptococcal infections and is usually associated with tampon use. The picture is one of septicaemic shock. Manage by fast transport, intravenous access en route, and oxygen. Problems in later pregnancyA number of complications of pregnancy pose potential threats to life, not only for the mother but also to the fetus (box 5). This is a very high risk area of practice where the inexperienced practitioner must ask for the patient to be reviewed by the obstetric team.
Box 5 Potential threats to life in late pregnancy
Placental abruptionThis occurs when the placenta separates from the uterus before birth. There is constant severe pain, and the uterus usually will be rigid and with a sustained contraction. There may be vaginal bleeding but much of the blood is retained within the uterus so the degree of shock will usually be out of proportion to the amount of revealed bleeding. Rapid transfer to hospital is essential—with intravenous access and high flow oxygen. The receiving unit should be alerted as emergency caesarean section will probably be required. Placenta praeviaThis often presents with painless vaginal bleeding unless the patient is in labour. It is due to the placenta covering the internal part of the cervix. This can lead to catastrophic vaginal bleeding as the cervix dilates at the start of labour. Pregnancy induced hypertension—pre-eclampsia and eclampsiaIn early pregnancy the blood pressure is usually lower than normal. A blood pressure of 140/90 mm Hg might seem fairly normal but in a pregnant woman implies pregnancy induced hypertension until proved otherwise (see box 6). Box 6 Symptoms and signs of severe pre-eclampsia
Pre-eclampsia is a condition specifically associated with pregnancy, usually but not always occurring in the late stages of pregnancy. Classically it presents with hypertension, proteinuria, and oedema. When the condition worsens the woman may complain of upper right sided or epigastric abdominal pain, headache, nausea and vomiting. She may become confused and have very brisk reflexes. Fitting can then follow. Unless the woman is a known epileptic, any fit in pregnancy is managed as a probable eclamptic fit. Fits attributable to eclampsia may pose significant airway problems. Manage these as in any other fit by simple airway manoeuvres. If the fit is not self limiting intravenous diazemuls should be given supplemented by magnesium sulphate once the patient arrives in hospital. It is also essential to control the blood pressure as soon as possible. Urgent transfer to an obstetric unit is required. EVALUATION OF THE STABLE PATIENTIf the primary survey shows no requirement for resuscitation then a secondary survey can be undertaken using the SOAPC system. History and examination has been shown to be very effective in distinguishing organic and non-organic causes of pain.7 Subjective informationThe history is the most important aid in reaching a diagnosis. The correct questions can very quickly allow the assessor to gauge the severity of the problem as well rule out the serious causes of abdominal pain. The main questions are related to the pain (box 7), other symptoms, previous treatment, or medical contacts in this episode, as well as the standard past medical, drug, allergy, and social history. Box 7 The questions that should be asked about the pain. “PQRST”Pain related questions
Pain—precipitating and palliative factors, quality, timing, and radiationPrecipitating and palliative factors may give important clues. The patient with peritonitis will usually lie still with movement or coughing worsening the pain. In contrast the patient with colic will often be restless, trying to find a comfortable position. Quality—abdominal pain is commonly described as “peritoneal” or “colicky”. If the parietal peritoneum is aggravated then the pain will be well localised to the area of the pathology. In contrast, visceral pain tends to be poorly localised. Pain arising from foregut structures (mouth to the proximal half of the duodenum) is felt in the upper abdomen, pain from mid-gut structures (distal half of the duodenum to middle of the transverse colon) is felt around the umbiliacus, and the hind gut (rest of colon to rectum) is felt in the lower abdomen. Colicky pain is usually attributable to spasm of a tubular structure, often around a blockage. Colicky pain is therefore more commonly biliary, intestinal, or ureteric in origin. Radiation of the pain may assist in diagnosis. Renal pain tends to radiate “loin to groin”. Diaphragmatic irritation, for example, ruptured ectopic, may radiate to the shoulder tip because of their common innervation (C3,4,5). Systemic symptoms—(nausea/vomiting/urinary/gynaecological) symptoms may be helpful in diagnosis but can also be misleading. For example, constipation is associated with obstruction but is not always present. It is important to establish the patient’s normal bowel habit. Diarrhoea is normal in gastroenteritis but may also be attributable to overflow related to chronic constipation, irritation of the pelvic peritoneum (for example, pelvic appendicitis) or partial obstruction. Faecal blood may indicate inflammatory bowel disease, cancer, or parasitic infection. Urinary symptoms may suggest urinary tract infection (UTI) but not all UTIs cause abdominal pain. In the female patient a menstrual history should be taken. Gynaecological causes should be considered. All women of child bearing age with abdominal pain who have missed period must have ectopic pregnancy excluded. Timing—Pain with a sudden onset is probably an acute severe event, for example, ruptured aneurysm or perforated viscus. In contrast a gradual onset suggests an inflammatory or infective cause. Pain may change over time, for example, appendicitis starts with a colicky periumbilical pain due to obstruction. This then leads to infection and a localised inflammation of the parietal peritoneum. Medical historyIf the patient has previously presented with the same problem it is important to keep an open mind. Diseases can progress, complications may arise, and the patient’s condition change. Medical history can reveal other abdominal problems or chronic illnesses (for example, angina) that may point you towards a diagnosis. Certain drugs are associated with gastrointestinal side effects. Non-steroidal anti-inflammatory agents increase risk of peptic ulceration and bleeding. Many antibiotics cause diarrhoea and some can cause life threatening problems such as pseudomembranous colitis. Key points
OBJECTIVE INFORMATIONThis consists of examination and investigations on scene (if available or relevant) and is summarised in box 8. Box 8 Summary of examination of patient with abdominal painScheme for examination General
Abdomen
Other
Patient preparationIn an ideal setting, examination of the abdomen would entail ensuring that the patient is exposed from “nipple to knee”, and PR or PV examinations performed. However, it is very likely that these will be difficult and often impossible in the community setting. If carrying out a PR/PV examination, explain all stages to the patient and have a chaperone present at all times. Exceptions to this rule would be where the patient is very unwell and there is an obvious clinical need, for example heavy PV bleeding or imminent childbirth. Vital signsVital signs have been discussed in primary survey and are often the most sensitive indicators of a serious problem. It is unlikely that the normotensive, apyrexial patient with a pulse rate of 80 has an immediately life threatening abdominal problem at the time of examination, but is no guarantee that such a condition may not develop. Other general signs such as assessment of hydration and smelling the breath for foetor (sweet smell indicating ketosis) may help assess the general state of health. The abdomenThe patient should be fully exposed within the boundaries of decency and careful inspection carried out. Look especially for obvious distension, swellings, hernias, or other masses or scars of previous operations. The patient should be examined with the arms by the side so as to decrease abdominal wall muscle tension. Ask the patient to take a deep breath and then to cough while observing the patient’s reaction and abdominal movement. The patient with peritoneal irritation will avoid movement or the pain will be increased. Feel—before palpating the abdomen ask the patient to point to the site of greatest pain and then start examination as far away from this point as possible. Initially use gentle, shallow palpation before palpating more deeply. In an area of specific tenderness due to peritoneal irritation there will usually be guarding—a spasm of the overlying abdominal muscles. Percussion over the area of tenderness giving pain suggests peritoneal irritation. Testing for rebound tenderness is no longer considered appropriate. Assess for organomegaly of the liver and spleen by always starting in the right lower quadrant and moving toward the hypochondia to avoid missing a grossly enlarged organ. Murphy’s sign is elicited by pressing the fingertips up towards the right costal margin and asking the patient to breathe deeply. If the gall bladder is inflamed, the patient will experience pain when breathing in as the gall bladder descends and comes into contact with the palpating hand. Always assess the inguinal and femoral hernia orifices. Obstruction secondary to a strangulated or incarcerated hernia is a diagnosis often missed by inexperienced clinicians. It is usually appropriate at this point to assess the scrotum in the male. Listen—auscultate for at least one minute in a single location. Absence of bowel sounds suggests significant pathology while high pitched tinkling sounds may also suggest obstruction. Rectal and vaginal examination—in the community setting these examinations may be difficult. Unless they are likely to add useful diagnostic information that might prevent hospital referral, they should be omitted. Abdominal examination is difficult in overweight, elderly, and paediatric patients, and those with a reduced conscious level. You need to take into account the less than ideal nature of your examination in the analysis of the problem. InvestigationsInvestigations that may be of use in the community are urine dipstick testing for urinary tract infection or haematuria, blood glucose testing in possible diabetic keto-acidosis, and a pregnancy test in any woman of childbearing age. This should be performed with patient consent. In atypical epigastric pain an ECG may be indicated. Key points
ANALYSISCertain symptoms are absolute indications for admission while others are more relative and rely on assessment and the degree of certainty about the diagnosis (see table 1). Table 1 Absolute and relative indications for referral to hospital In the woman of childbearing age, always consider the possibility of ectopic pregnancy. If there is any doubt discussion with the gynaecology team is mandatory. Table 2 lists the common diagnoses in patients with acute abdominal pain and the “classic” signs and symptoms. However, many abdominal conditions can present in an atypical fashion also signs and symptoms may change. Thus, the need for a high index of suspicion. Table 2 Common diagnoses and their common presentation Abdominal pain in womenThe assessment principles are described above. The menstrual history must be taken and pregnancy or its complications always suspected (box 9). Box 9 Important causes of abdominal pain in womenCommon
Uncommon
Rare
Ectopic pregancyThis is a diagnosis that should be considered in all women of reproductive age. Classically the patient will have lower abdominal pain, a history of a late or missed period, and signs of peritoneal irritation. Unfortunately the symptoms and signs may be misleading. You should have a high index of suspicion if the woman has a history of infertility, has missed a period while using an intrauterine contraceptive device, or has been sterilised. The management has been outlined in the section on primary survey. Key pointsAlways consider the possibility of ectopic pregnancy in women with abdominal pain.
Common problemsCystitis is very common with classic symptoms of frequency and dysuria. Systemic symptoms such as nausea, vomiting, and fever are not usual in simple cystis. The abdominal pain is less of a feature than the urinary symptoms and the abdomen is rarely tender. Urine analysis gives a typical picture with protein and white cells and often some blood. One important pitfall is that other causes of pelvic inflammation can also cause frequency and dysuria. For example, a pelvic appendicitis will cause abdominal pain, dysuria, frequency and even protein, blood and white cells on urine analysis. PitfallAny cause of pelvic inflammation may cause dysuria and frequency Most women with cystitis will be systemically well and will have no major abdominal signs. Cystitis is diagnosed by sending a midstream specimen of urine for culture and sensitivity and is treated with oral fluids and antibiotics. Alkylating agents may give symptomatic relief. Pyelonephritis is associated with urinary symptoms but the patient is unwell, has loin pain, is pyrexial, and often has nausea or vomiting. If the systemic symptoms are mild then outpatient treatment is possible. If the patient cannot tolerate oral antibiotics nor has significant systemic symptoms and signs, then they will need referral to hospital. DysmenorrhoeaPain at the time of the period is an extremely common symptom. If the period is late or the amount of bleeding is abnormal then ectopic pregnancy or miscarriage should be considered. There are no major abdominal signs. A pregnancy test should be done. A non-steroidal anti inflammatory such as mefenamic acid is the best symptomatic treatment for this problem. Early pregnancy vaginal bleeding/miscarriageA miscarriage is the loss of a pregnancy before 20 weeks gestation. The usual symptom is vaginal bleeding. There is often some abdominal pain but this is not usually severe. If the bleeding is not severe (for example, less than in normal period), the pregnancy is less than 12 weeks and the patient is well and stable contact the gynaecology unit to arrange review at an early pregnancy assessment unit. If the bleeding is heavy, there is tachycardia or bradycardia and hypotension, products of conception have been passed, or if the abdominal pain is severe, refer for immediate gynaecological assessment. Pelvic inflammatory diseaseInfections of the fallopian tubes and surrounding tissues are common in sexually active women. Typically there may be a history of vaginal discharge and lower abdominal pain. The differential diagnosis includes urinary tract infection, appendicitis, and ectopic pregnancy. Patients with mild symptoms should be advised to consult their primary care doctor or go to a genitourinary medicine clinic as soon as possible. Patients who have missed a period, have a positive pregnancy test, or have significant systemic upset should be referred to hospital for further investigations. Ovarian cysts, mid-cycle ovulation painOvarian cysts may rupture or undergo torsion. The cyst may not be large enough to feel abdominally but there will be rebound tenderness and signs of peritonism. There may be a mild fever. If the right ovary is involved the presentation is similar to appendicitis. Refer to the gynaecology team. Mid-cycle ovulation pain occurs at ovulation. As the follicle ruptures there may be mild irritation of the peritoneum. The patient is well, she is at the midpoint of a normal menstrual cycle, the symptoms are short lived, vital signs are normal, there are no systemic symptoms. Check a pregnancy test. Advise simple analgesia but emphasise the need to seek further advice if the pain does not settle, gets worse, or other symptoms develop. Ovarian hyperstimulation syndrome—this is a gynaecological emergency, which may be life threatening. It generally occurs in women who are having ovulation induced under the care of an assisted conception unit. Large cysts appear in the ovaries and fluid shifts from the circulation to produce ascites and a shock-like clinical syndrome. These patients will have abdominal pain and significant systemic upset. If a women undergoing IVF or other methods of assisted conception develops abdominal pain, refer urgently to the appropriate gynaecological team. PLAN FOR PATIENTS WITH ABDOMINAL PAINA risk stratification approach will give a good guide as to the appropriate management plan. This involves using your analysis to put patients in one of five groups. Group 1—features suggesting hospital referralThere are very clear signs of definite surgical pathology with a large number of typical features of disease, for example classic appendicitis. In these patients the management plan is straightforward and little further investigation is needed in the emergency department. These patients should, therefore, be referred to the appropriate inpatient team (for example, surgical admissions unit). Group 2—patients who need a disease “rule out”There are borderline cases with some features of a diagnosis but the clinical picture is not sufficiently clear to make a definite decision on management. They need further investigation and possibly further observation. This group will include the very young, the older patient, and cases where there are communication difficulties. These may need to be referred to A&E or to the appropriate inpatient team. Group 3—common features permitting diagnosis of a problem that may be treated at homeFor example the young woman with definite signs of urinary tract infection and no signs of other pathology, or a clear history of a likely self limiting gastroenteritis in an otherwise fit and healthy person. Group 4—type of patient who may be treated by a wait and see approachThis group has no specific symptoms or signs that indicate serious pathology at the time of assessment. Do not give a “diagnosis” such as “constipation” or “UTI” when there are no specific symptoms or signs or confirmatory test results. These patients may be managed at home with advice that the diagnosis is not clear but at present there are no signs of serious pathology. The patient should be advised to seek further advice if symptoms fail to settle or get worse. Group 5—social implicationsSome patients may need referral, such as the very elderly or very young, because of difficulty coping at home as well as the tendency for more rapid deterioration in condition. Key point
COMMUNICATIONCommunication in abdominal pain is both with the patient and with other agencies. The patientIf they are to be managed at home then they should have a full explanation of your findings and, if possible, probable diagnosis and its usual progression/resolution. If the diagnosis remains unclear reassure the patient that there are no signs of serious illness that require admission at present but they should seek further consultation if things worsen. If they require admission explain why as clearly and concisely as possible in straightforward language. Other agenciesIf the patient requires admission then a clear, concise, and legible letter to the admitting team is appropriate in all but the imminently life threatening case (for example, AAA). This should include the important details from the history and examination as well as details of any previous consultations if known. If the patient is managed at home ensure details are entered in the GP notes or details sent to the patients GP as appropriate. Normal labourIf delivery is not imminent transfer to labour ward or contact community midwife. However, the emergency practitioner may be faced with a woman in preterm labour, or with a concealed or unsuspected pregnancy who is about to deliver. The local obstetric unit should be contacted to request an on call community midwife to ask them to attend. A detailed description is found in many texts (JRCALC, Ambulance service manual, WHO web site.8,9 Box 10 summarises management). The key action is to provide gentle support. Box 10 Summary of the management of normal labour
Syntometrine should be given soon after delivery if it is available as it reduces bleeding and aids separation of the placenta. This should only be given when it is quite certain that this is not a multiple pregnancy. PitfallSyntometrine or ergometrine will exacerbate hypertension—use syntocinon instead. None of these drugs should be given if there is a possibility of multiple pregnancy until all babies are delivered Multiple birthsThere is usually a reasonable time delay between delivery of the first baby and the second. The placenta should be left in situ and arrangements made to transfer the mother into an obstetric unit. If the urge to push occurs again delivery should be as detailed elsewhere. BreechThis is when the feet or bottom are delivered first. You should avoid handling the baby. If necessary any pressure should be placed around the baby’s pelvic girdle to ensure that the baby remains with its back uppermost. Ideally the mother should give birth at the edge of the bed so the baby can hang freely to allow gravity to aid delivery. Once the nape of the neck is visible hold the baby’s feet and gently sweep them in upwards arc to a vertical position to aid delivery of the head. Management of problemsCord prolapseIf the cord (a rope like structure) is seen protruding through the vagina the woman should be transported urgently to hospital. If possible she should be placed in an all fours position with the head down and buttocks up in the air to reduce pressure on the cord and allow oxygen to reach the baby. Put warm saline swabs on the cord (if readily available, do not delay transport). Warn the receiving unit to prepare for emergency caesarean section. Shoulder dystociaAfter the head delivers the shoulders should follow within the next two contractions. If they do not deliver do NOT pull on the baby’s head, but encourage the mother to push with her hips and knees sharply flexed up towards her shoulders, or alternatively encourage her to turn onto all fours on her hands and knees. Pressure can be put on the anterior shoulder to promote adduction of the shoulders. Stand behind the baby’s back and press obliquely downwards above the symphysis pubis. Postpartum haemorrhageIf heavy bleeding occurs intramuscular syntometrine should be given, intravenous access obtained. If the placenta has delivered the uterus may be aided in its contraction by rubbing the lower abdomen. Make urgent arrangements to transfer into hospital. SUMMARYAbdominal pain is a common presentation to the community practitioner. Most presentations can be managed at home with simple advice and support, however some require admission for further assessment. A structured approach to management will avoid missing the serious signs and symptoms of potentially life threatening illness. Particular care is required in the very elderly or very young because history taking and examination can be difficult. AcknowledgmentsWe would like to thank Peter Driscoll and Malcolm Woollard for their detailed comments and critiques of drafts of this paper. REFERENCES
What causes lower abdominal stabbing pain in females?If you are female and suddenly start experiencing lower abdominal pains in your lower left or right abdomen, you may have a ruptured ovarian cyst. Issues with your ovaries can be caused by a fluctuation in your hormones, pregnancy, sexual intercourse, and constipation. In some cases an ovary may need to be removed.
What do sharp lower abdominal pains mean?Sharp abdominal pain could be from gas, which can be surprisingly painful, but it also may be a sign of appendicitis, gallstones, a blockage in your intestines, kidney stones, pancreatitis, or other serious issues. If it doesn't go way and you have other symptoms, call your doctor or go to the ER.
When should I worry about sharp abdominal pain?Call your doctor if you have abdominal pain that lasts 1 week or longer, if your pain doesn't improve in 24 to 48 hours, if bloating lasts more than 2 days, or if you have diarrhea for more than 5 days. There are three body views (front, back, and side) that can help you to identify a specific body area.
|