To develop an intervention to train family carers to perform and document basic vital signs whilst they provide personal care to their relatives after surgery in order to supplement patient monitoring conducted by nursing staff. To evaluate the effect of this intervention on the frequency of documented vital signs for patients in the first three days after surgery in a stepped-wedge cluster trial.

Quality improvement (QI) interventions can be seen has having a 'hard core', the clinical processes or practices that are the focus of improvement, and a 'soft periphery', the improvement methods that will enable change to occur. In the SMARTER trial, family carers will be trained to perform basic vital signs monitoring and document the results. Nursing and medical teams looking after patients on the wards will retain full responsibility for patient care throughout all phases of the trial. The nursing team will be provided with an identical observation chart for all their ward patients at the beginning of the trial and will be given training on how to use them and how to respond to deteriorating vital signs.

During the intervention period, in addition to the nurses' vital signs monitoring, family members will be asked to perform basic vital signs monitoring. Participants will be given clear guidance on when to alert staff to potential danger signs.

The soft periphery is the training programme and resources designed to assist staff to rapidly and effectively train these skills combined with ongoing maintenance strategies to ensure the compliance with the intervention is maintained throughout the intervention period. The investigators will use the Medical Research Council (MRC) Complex Intervention framework to guide the development and evaluation of our intervention. Previous empirical work on task-sharing and relevant theory will be used to design the intervention and associated programme theory (Phase 1 of the MRC framework), with an iterative co-design process used to further develop these and test how the intervention works in practice (Phase 2).

Intervention training sessions will last 30 minutes and will be held twice a day over a period of six months. Participants will be welcome to attend as often as they wish. Participants will be given practical training to assess the following vital signs: heart rate, respiratory rate, conscious level (AVPU scale) and arterial oxygen saturation (SpO2) in accordance with trial standard operating procedures. An important component of the training package will be ensuring participants know how to wash their hands before and after contact with their patients. The investigators will ensure that handwashing facilities are available on the ward for use by participants. Participants will record vital signs on a basic observation chart every 4 hours after surgery. They will compare results with colour posters displayed throughout each ward, providing guidance on how and when to notify nursing staff of abnormal vital signs.

Participants will have access to the following equipment throughout the trial: pulse oximeter, wall clock, colour coded guidelines on wall, observation charts, clipboard and pen. Although poor numeracy and literacy are common in eastern Uganda, most patients will have a carer who is able to read a digital clock and write numbers. The observation chart will be designed to be very simple to use. Participants will be encouraged to attend the training sessions each day to ensure their skills and knowledge are refreshed. After the third post-operative day, the trial intervention will end although participants may choose to continue monitoring vital signs and attending training sessions if they wish. It is acknowledged that carers may have to change throughout the day due to conflicting family or work commitments. Participants will be encouraged to remain available to monitor their patients for the duration of the study period (72 hours). Medical and nursing staff on the wards will undergo training in how to respond appropriately to abnormal vital signs.

Inclusion Criteria:

Patients:

• Patients ≥5 years of age undergoing surgery at Mbale Regional Referral Hospital, who receive post-operative care in one of four main surgical wards, with a family carer prepared to participate in the trial intervention.

Carers:

• All carers will be included in the trial if they feel they are capable of performing and documenting the basic vital signs provided they agree to participate in the trial.
• The ability to speak English, Luganda, Lugisu, Ateso or Lugwere
• The ability to read a digital clock (to measure vital signs)
• Numeracy sufficient to write numbers on the basic observation chart

Exclusion Criteria:

Patients:

• Refusal of informed consent.
• Identification of potential participant >24hours after operative procedure has taken place

Carers:

• Refusal of informed consent.