Patient values informing medical treatment: a pilot community and advance care planning survey

Medicine regards the prevention of death as an important priority. Yet patients may have a range of priorities of equal or greater importance. These other priorities are often not discussed or appreciated by treating doctors.

OBJECTIVES

We sought to identify priorities of care for patients attending an advance care planning (ACP) clinic and among the general population, and to identify factors associated with priorities other than prolonging life.

METHODS

We used a locally developed survey tool 'What Matters Most' to identify values. Choices presented were: maintaining dignity, avoiding pain and suffering, living as long as possible, and remaining independent. Participants rated the importance of each and then selected a main priority for their doctor. Participant groups were a purposive sample of 382 lay people from the general population and 100 attendees at an ACP clinic.

RESULTS

Living as long as possible was considered to be less important than other values for ACP patients and for the general population. Only 4% of ACP patients surveyed and 2.6% of our general population sample selected 'living as long as possible' as their top priority for medical treatment.

CONCLUSIONS

'Living as long as possible' was not the most important value for ACP patients, or for a younger general population. Prioritisation of other goals appeared to be independent of extreme age or illness. When end of life treatment is being discussed with patients, priorities other than merely prolonging life should be considered.

Patient values informing medical treatment: a pilot community and advance care planning survey

Medicine regards the prevention of death as an important priority. Yet patients may have a range of priorities of equal or greater importance. These other priorities are often not discussed or appreciated by treating doctors.

A Comparative Study of Tracheal Diameter in Caucasian and Chinese Patients

Ethnicity may be considered a factor when considering what size endotracheal tube to insert. In particular it has been suggested that Chinese patients have a smaller tracheal diameter, justifying the selection of smaller endotracheal tubes. We systematically evaluated transverse tracheal diameters in Chinese and Caucasian patients, utilising archived computer tomography images. A convenience sample of 100 Caucasian patients from Australia was compared with 100 Chinese patients from Hong Kong. Patients over 18 years of age who had undergone a computerised tomography scan of the neck and thorax, and also had accurate body height and weight recorded, were studied. The mean transverse diameter of the trachea measured at three levels was similar between the Chinese and Caucasian patients. At the narrowest measurement point, the immediate subcricoid transverse diameter, the unadjusted mean difference between male Chinese and Caucasian patients was small (1 mm, standard deviation 0.83 mm, P=0.01), and similarly small between female Chinese and Caucasian patients (1.5 mm, standard deviation 0.8 mm, P <0.01). Multivariate analysis demonstrated only a small influence related to ethnicity (12% relative contribution to the overall variance [R2] of the model), but substantial influence of height (40%) and sex (41%). Our findings do not support the practice of routinely selecting a smaller endotracheal tube size for Chinese patients on the basis that there is a difference related to the Chinese ethnic phenotype. Considerations regarding choice of endotracheal tube size should rather focus on patient sex and height.

The Utility of a Personal Values Report for Medical Decision-Making

Our aim was to determine if a patient's Personal Values Report (PVR) has a positive impact on a doctor's decisions regarding treatment. We conducted a prospective cohort study delivering a short, web-based hypothetical case-centred questionnaire to intensive care doctors practising in Australia and New Zealand. One hundred and twenty-four intensive care consultants and registrars agreed to participate in an online questionnaire in two routine mailings between November 2013 and February 2014. We evaluated the effect of a PVR on clinical decision-making in a case-based scenario. In addition, participants rated the utility of the PVR on their decision-making process. Participants were presented with a difficult scenario in a frail elderly man where death was almost inevitable without aggressive support but survival with severe disability was possible with significant intervention. Most doctors (52.4%) elected to continue ventilation and admit to ICU. After the PVR was made available, only 8.1% of doctors continued to choose to admit the patient to the ICU. In all cases where admission to the ICU was chosen after seeing the PVR, the admission to the ICU was stated to be to permit family to arrive before withdrawing support (an approach which was consistent with the values stated in the PVR). One hundred and twenty-one of the 124 participants (97.6%) agreed or strongly agreed that the PVR helped them get an understanding of the patient's wishes, whereas none of the participants (0%) were unsure, disagreed or strongly disagreed with this statement. The remaining 2.4% did not answer the question. It is surmised that PVRs pre-written by patients are potentially an effective and valuable tool for use in helping doctors make decisions regarding patient care.

Safety and feasibility of an insulin adjustment protocol to maintain blood glucose concentrations within a narrow range in critically ill patients in an Australian level III adult intensive care unit

OBJECTIVE

Recent data have shown a link between normal blood glucose levels and improved outcomes in intensive care patients. We wished to develop an insulin adjustment protocol for an adult intensive care unit to maintain blood glucose concentrations safely within a narrow range.

METHODS

After a 6 month introductory period, an observational study was conducted during a 10 month period in an Australian level III intensive care unit to assess the safety and feasibility of an insulin adjustment protocol to maintain blood glucose concentrations safely within a narrow range. The protocol included a variable insulin infusion, a constant caloric source and frequent blood glucose level monitoring to detect and prevent hypoglycaemia.

RESULTS

Over the 10 month period a total of 148 patients were studied using the protocol and represented 13 % of all intensive care unit admissions during this period. In total, there were 12,623 patient hours 'on protocol', with 5,603 blood glucose levels performed. The mean morning blood glucose level was 6.5 mmol/L and 49% of blood glucose levels were within the target range of 4.1 - 7.0 mmol/L. There were four recorded incidents of hypoglycaemia, defined as a blood glucose level of less than 2.2 mmol/L, the lowest at 1.5 mmol/L being the only symptomatic episode. The incidence of hyperglycaemia (blood glucose level > 10 mmol/L) was 13 % of all blood glucose level measurements.

CONCLUSIONS

The insulin adjustment protocol with a constant caloric source and frequent blood glucose level monitoring was found to be safe and feasible in maintaining blood glucose concentrations within a narrow range in a mixed adult intensive care unit population.

Washing of gloved hands in antiseptic solution prior to central venous line insertion reduces contamination

Glove contamination at the time a central venous catheter is handled is highly undesirable and likely to increase the risk of subsequent line infection. This study was designed to determine how frequently gloves become contaminated during central venous line insertion and to demonstrate the value of glove decontamination immediately prior to handling of the central venous catheter During twenty routine internal jugular catheter insertions the sterility of the operator's gloved fingertips (just prior to handling the intravenous catheter) was assessed by touching the fingertips onto blood agar plates. The gloved hands were then rinsed in chlorhexidine/alcohol and after drying were placed onto a further plate. Contamination was detected in 55% of the prewash plates but in none of the postwash plates. Procedures performed by less experienced resident staff had a higher contamination rate despite there being no evident breach of sterile technique. It is likely that glove contamination results from the persistance of bacteria within the deeper layers of the skin, despite surface disinfection. These bacteria may be released by manipulation of the skin when identifying landmarks. This hypothesis was supported by a subsequent observation that gloves were more highly contaminated after firm touching of the skin rather than light touching. Glove contamination during central line insertion is frequent. Catheter contamination rates could be reduced (without risk or additional cost) by rinsing gloved hands in a solution of chlorhexidine (0.5%) in alcohol (70%) prior to handling the catheter.

Circulating secretory phospholipase A2 in critical illness--the importance of the intestine

OBJECTIVE

To review the role of secretory phospholipase A2 in the pathogenesis of multiple organ failure in the critically ill patient.

DATA SOURCES

Relevant articles and published reviews on secretory phospholipase A2 in critical illness.

SUMMARY OF REVIEW

Secretory phospholipase A2 (sPLA2) has an important role in inflammation and in antimicrobial defence. However, excessive activity of sPLA2 has been shown to result in tissue damage and has been implicated as a mediator of organ failure associated with critical illness. Gastrointestinal release of secretory phospholipase A2 from Paneth cells increases during intestinal ischaemia and may be an important factor in the pathogenesis of the multiple organ dysfunction syndrome. In experimental models, specific PLA2 inhibitors reduce organ failure associated with sPLA infusion and may play an important role in reducing organ failure in the management of the critically ill patient.

CONCLUSIONS

Intestinal ischaemia may play an important role in the pathogenesis of the multiple organ dysfunction syndrome in the critically ill patient. In patients with sepsis, specific PLA2 inhibitors have the potential to reduce organ failure and improve morbidity and mortality.

Travel insurance

In this article are salutory and awful stories, all based on true cases. They serve to illustrate how terrible the problems can be when travel insurance is not appropriately secured before a traveller becomes sick, or where the patient assumes the risk himself, without insurance, in the absence of a proper understanding of the consequences.

Monitoring intestinal ischaemia

OBJECTIVE

To review the clinical and experimental methods of detecting intestinal ischaemia and to assess their value in current clinical practice.

DATA SOURCES

Relevant articles and published reviews on intestinal ischaemia and/or infarction.

SUMMARY OF REVIEW

The incidence of acute mesenteric ischaemia has increased substantially over the last few decades. Death rates of 70% to 90% have been reported for this condition. Improved management depends upon prompt diagnosis and early aggressive management. Despite mounting evidence that ischaemic intestinal injury may be frequent and may be a cause of multi-organ failure, accurate monitor-ing of the intestinal circulation in critically ill patients continues to be a distant goal. The need for a reliable, specific test of intestinal ischaemia has been recognised for many years. Numerous potential monitors have been evaluated including intraluminal pCO2, abdominal CT, abdominal MRI and specific plasma enzymes, but few have shown potential to be clinically useful. At present no specific test for intestinal ischaemia and/or infarction is in routine clinical use. Development of a specific test to monitor for intestinal injury would be of great clinical value. Further work will inevitably lead to the development of useful markers.

CONCLUSIONS

Accurate detection of intestinal ischaemia in the critically ill patient is often difficult. While numerous tests have been examined to diagnose and monitor intestinal ischaemia and/or infarction most exhibit an unacceptably low specificity and sensitivity.

Gastric emptying in the critically ill patient

OBJECTIVE

To review the pathophysiology of gastroparesis and present a practical approach to the management of this disorder in the critically ill patient.

DATA SOURCES

Articles and published abstracts on the mechanisms and management gastroparesis relevant to the critically ill patient.

SUMMARY OF REVIEW

The importance of early enteral nutrition in the critically ill patient has been recognised for many years. However, while nasogastric tubes are easy to insert, gastric dysmotility is common, and often hinders the introduction of effective enteral nutrition. Small bowel motility problems are uncommon in the intensive care patient, and direct instillation of nutrients into the jejunum will allow enteral nutrition to begin without delay. However compared with gastric tubes, jejunal tubes are often difficult to insert, often requiring endoscopic or surgical techniques. The cause of gastric dysmotility is multifactorial. Treatment of underlying sepsis, pain, hypotension, dehydration and hyperglycaemia should occur, and opiates and dopamine should be avoided before commencing prokinetic agents. The patient's head should remain elevated, and oral or nasogastric cisapride (10 mg 6-hourly) administered. If this is not effective then erythromycin (e.g. 250 mg i.v. 8-hourly) may be included.

CONCLUSIONS

Gastric dysmotility is common in the critically ill patient. However, treatment of the underlying conditions leading to gastroparesis and the introduction of prokinetic agents will allow the majority of patients to be successfully fed enterally.

A Seldinger technique for minitracheostomy insertion

Minitracheostomy is a valuable technique in patients with sputum retention. However, insertion of a minitracheostomy tube over a dilator passed through an incision through the cricothyroid membrane (the suggested method of insertion of the 'Mini-trach II', [Portex]), can prove difficult. A Seldinger method is described which results in easier and more reliable placement in difficult cases.