Speaker's Highlight

• Don Sin University of British Columbia, St. Paul Hospital (Canada)
  Kenneth R. Chapman Toronto General Hospital Research Institute (Canada)
• Parameswaran Nair McMaster University (Canada)
  Carolyn Calfee UCSF (U.S.A.)
• Gregory P. Downey University of Colorado School of Medicine (U.S.A.)
  David A. Schwartz University of Colorado School of Medicine (U.S.A.)
• Neil Schluger Tuberculosis Control Branch, California Department of Public Health (U.S.A.)
  Nick Kim Critical Care & Sleep Medicine, University of California San Diego (U.S.A.)
• Nicola Hananiah Baylor College of Medicine (U.S.A.)
  Jae-Joon Yim Seoul National University College of Medicine (Republic of Korea)
• Koichiro Asano Tokai University School of Medicine (Japan)
  Diahn-Warng Perng Taipei Veterans General Hospital (Taiwan)
• Konstantinos Kostikas University of Ioannina (Greece)
  Karin Klooster University Medical Center Groningen (Kingdom of the Netherlands)

• Advances in directed sputum collection for lower respiratory infections

  Lower respiratory tract infections remain a major reason for presentation to Australian hospitals, general practices and urgent care services. Pneumonia, bronchiectasis exacerbations, tuberculosis and chronic pulmonary infection can look similar at first, yet each may require a different antimicrobial strategy. A high-quality respiratory specimen helps clinicians move beyond guesswork.

  Directed sputum collection is a practical approach for patients who can produce lower-airway secretions but whose first sample is likely to be contaminated by saliva. The method combines patient coaching, positioning, timing and specimen assessment. It is especially useful when ordinary expectoration has produced repeated “mixed respiratory flora” reports or an inadequate volume for molecular testing.

  The subject fits closely with the educational focus of the APSR 2022 congress site, where respiratory medicine, clinical research and healthcare practice are brought together for a specialist audience. Advances in specimen collection are valuable because laboratory accuracy begins before the tube reaches pathology.

  Australian services also need methods that work across very different settings. A tertiary respiratory unit in Melbourne may have rapid access to bronchoscopy, while a regional clinic in Queensland or the Northern Territory may depend on a carefully collected sputum sample and reliable transport to a central laboratory.

  Why specimen quality matters

  A sputum specimen should represent material from the lower respiratory tract rather than pooled saliva from the mouth. Poor samples can obscure bacterial pathogens, produce misleading culture results and encourage unnecessary broad-spectrum antibiotics. This affects individual care and contributes to antimicrobial resistance across the health system.

  The problem is common in older adults, people with dry coughs and patients who have already started treatment. It can also arise when instructions are rushed. Asking a patient to “spit in the pot” may produce a watery oral sample, whereas clear guidance about deep breathing, coughing from the chest and avoiding food immediately beforehand can improve diagnostic yield.

  Directed collection has a role in suspected bacterial pneumonia, infective exacerbations of chronic obstructive pulmonary disease, bronchiectasis and some cases of mycobacterial disease. It does not replace clinical assessment, chest imaging or blood tests, and a negative result cannot exclude infection when the patient cannot generate representative secretions.

  Preparing the patient for collection

  Privacy, calm communication and plain Australian English can make a noticeable difference. Explain that the aim is to collect phlegm from the chest, not saliva, and demonstrate a slow deep breath followed by a strong cough. The patient should rinse the mouth with water first, without using mouthwash, and should generally avoid eating immediately before collection.

  An upright position is usually preferable because it supports lung expansion and reduces aspiration risk. For patients with bronchiectasis, collection after prescribed airway-clearance therapy may produce a more useful sample. Some services schedule the process early in the morning, when secretions have accumulated overnight, although timing should be adapted to symptoms and local workflow.

  Staff should check whether the patient can follow instructions, has severe breathlessness or is at risk of aerosolising infectious material. Suspected tuberculosis or other transmissible infections require the appropriate ventilation, respiratory protection and isolation procedures. In remote Aboriginal communities, working with Aboriginal Health Workers and respecting local communication preferences can improve participation and trust.

  Techniques that increase lower-airway yield

  Simple coaching is often the first intervention. Ask the patient to breathe slowly and deeply several times, hold the final breath briefly and then cough forcefully from the chest. Gentle mobilisation, hydration when clinically suitable and prescribed bronchodilator treatment may help selected patients. The sample should be placed directly into a sterile, leak-proof container without touching the inside or lid.

  When spontaneous sputum is unavailable, an appropriately trained clinician may use nebulised hypertonic saline to induce sputum. This should occur in a suitable clinical area with monitoring for bronchospasm and desaturation. Inhaled salbutamol may be considered for patients with reactive airways when clinically indicated, but induction is not a routine substitute for assessing whether the procedure is safe.

  A directed approach also includes knowing when to escalate. Repeated poor-quality specimens, progressive illness or concern about an unusual pathogen may justify bronchoscopy, protected lower-airway sampling or specialist review. The collection method should serve the diagnostic question rather than delay urgent treatment.

  Laboratory handling and interpretation

  Each container should be labelled at the point of collection with the patient’s identifiers, specimen type, date and time. The request should state the suspected diagnosis, recent antimicrobial exposure, relevant travel or epidemiological risks and whether testing for mycobacteria, fungi or specific viruses is required. Clear clinical information helps the laboratory select appropriate processing and reporting pathways.

  Prompt transport is important because delays can affect organism recovery and the interpretation of culture. This is a practical issue for Australia’s large distances: a specimen collected in regional Western Australia, Far North Queensland or near Royal Darwin Hospital may travel considerably farther than one collected in a metropolitan clinic. Packaging, temperature requirements and courier arrangements should follow the receiving laboratory’s instructions and NATA-accredited procedures.

  Laboratory reports should be read alongside specimen quality comments. Squamous epithelial cells, abundant oral flora or a small volume may indicate contamination rather than absence of a pathogen. Conversely, a credible sample with a predominant organism can support targeted therapy, particularly when the result aligns with imaging, fever, sputum character and the patient’s clinical course.

  Applying the approach across Australian services

  In metropolitan hospitals, respiratory nurses, physiotherapists and infectious diseases teams can embed directed collection into admission pathways. Electronic prompts can identify patients with bronchiectasis or recurrent infection, while standardised education sheets reduce variation between shifts. Emergency departments need a streamlined process that does not hold up imaging or time-critical treatment.

  Regional and remote services may need a more flexible model. Collection instructions can be incorporated into outreach clinics, community health programs and telehealth-supported respiratory reviews. Aboriginal Community Controlled Health Services can help shape culturally safe processes, particularly where past healthcare experiences affect willingness to cough deeply or provide a specimen.

  Seasonal pressures matter as well. During winter respiratory surges in New South Wales and Victoria, collection bays may be busy and infection-control space limited. In northern Australia, wet-season access and transport disruptions may affect turnaround times. A documented backup plan for courier delays, repeat sampling and escalation to a larger centre is therefore part of diagnostic quality.

  Practical recommendations for better collection

  A small number of consistent actions can improve both patient experience and laboratory usefulness:

  • Explain the difference between chest phlegm and saliva before handing over the container.
  • Use an upright posture, deep-breathing coaching and a private, well-ventilated collection area.
  • Review infection-control precautions when tuberculosis or another transmissible infection is possible.
  • Record recent antibiotics, airway-clearance treatment and the exact collection time.
  • Send the specimen promptly in approved packaging through the established pathology pathway.
  • Treat a poor-quality report as a reason to reassess collection, not automatically as evidence of no infection.
  • Build a referral pathway for induction, bronchoscopy or specialist review when expectorated sputum remains inadequate.

  These measures are inexpensive compared with repeated consultations, unsuitable antibiotics or delayed diagnosis. They can also be audited through specimen rejection rates, reported contamination, turnaround time and the proportion of clinically useful cultures.

  Moving from technique to reliable practice

  Directed sputum collection works best when it is treated as a clinical process rather than a single instruction. Nurses, doctors, physiotherapists, Aboriginal Health Workers, pathology collectors and laboratory scientists all influence the final result. Shared protocols should define patient preparation, safety checks, labelling, transport and follow-up of rejected specimens.

  The next practical step is to review the local sputum pathway this month, observe how one sample is collected from instruction to laboratory receipt, and record one measurable change—such as reducing saliva-contaminated specimens in the next audit cycle.

  Richard Russell Nuffield Department of Clinical Medicine, University of Oxford (United Kingdom)
• Mona Bafadhel King’s College London (United Kingdom)
  David Jackson Guy’s and St Thomas’ Hospital, King’s College London (United Kingdom)
• James Chalmers University of Dundee (United Kingdom)
  David Price University of Aberdeen (United Kingdom)