Both non-invasive and invasive ventilation are initiated with the aim of improving the patient's quality of life, and in some cases of prolonging their life. Fatigue, headaches and a sensation of choking on obstructions in the airways are symptoms that reduce the quality of life in the advanced stages of ALS. Ventilation via a tracheostomy will enable patients to live for many years. A Danish study showed that tracheostomy patients received ventilation for 2.8–4.7 years (13). Prolonged survival of 2–4 years using invasive ventilation has also been demonstrated (14, 15). A recent Japanese study showed an average prolonged life of 6.7 years (16).
It is difficult for patients to assess quality of life when the alternative is death
Multiple studies show that ALS patients maintain a good quality of life with this type of advanced treatment, and that patients often rate their own quality of life higher than the doctors (15, 16, 17). Psychological, social and existential factors have a greater impact on self-reported quality of life in ALS patients than physical function level (18). In practice, however, it is often very difficult to assess the quality of life in patients showing signs of locked-in syndrome, i.e. conscious but unable to speak or move. This is particularly the case if cognition and language function are also affected. It is difficult for patients to assess quality of life when the alternative is death (7). Patients may feel guilt towards family members for the situation they are all in when a patient is receiving ventilation via a tracheostomy.
One of the challenges when ALS patients are receiving ventilation via a tracheostomy is that a decision often has to be made about whether to withdraw ventilation (19). In our view, patients must be informed of this before the intervention is offered. Patients will have the right to discontinue the ventilation whenever they wish, but this can of course be a very difficult decision. A significant challenge for patients and therapists is the patient's reduced ability to communicate. Prior to initiating the intervention, an agreement will normally be made with the patient to switch off the ventilator when it is no longer possible for the therapist and patient to communicate. However, agreements of this nature are not legally binding for the patient, who will subsequently have the opportunity to retract it. However, the agreement will help to ensure that the patient is informed and has reflected on these matters, and will serve as a record of the patient's wishes when ventilation was initiated. In the final phase, eye communication will be difficult. The therapist may be afraid of not fully understanding what the patient means. This can lead to over-treatment.
Negative consequences for the family must be considered when deciding whether to provide ventilation
An important principle in medical ethics is that no harm comes to the patient. In ALS, however, there is also the potential for harming the family. Ventilation via a tracheostomy affects not only the patient but also the family and healthcare personnel. Cultural differences may dictate whether a family is able to accept invasive ventilation (20). Negative consequences for the family must be considered when deciding whether to provide ventilation. We believe that this must be discussed with the patient prior to initiating ventilation via a tracheostomy. There is very little research on the strain experienced by patients' families, but it has been shown that they report a reduced quality of life to a greater extent than the patients (21) and that they are faced with a major burden (20, 22). Spouses can feel trapped, and divorce or separation can be regarded as ruthless. Patients' families therefore have no choice but to stick with the patient. The time perspective is uncertain, and this has a considerable effect on their quality of life. In a US study, more than half of the family members were depressed when the decision was made to provide ventilation, but the number who had symptoms of depression fell during the intervention period (23). The patient cannot be solely responsible for this type of decision. Discussion between the doctor, patient and family is essential for shedding light on how ventilation via a tracheostomy will affect the patient and their family.
Another important principle in all medical interventions is respect for the patient's autonomy.
ALS patients may experience impaired cognitive function, ranging from a subtle language disorder to impaired executive functions (24). We believe that consideration should always be given to whether patients understand what the decisions on future interventions may mean for the family and other carers. This is especially important for patients with mild frontal impairment without clinical frontotemporal dementia. These patients will lack understanding of how the disease and treatment may impact on their spouse and children. A decision must be made on whether the patient has sufficient awareness to understand the consequences of decisions. If the cognitive impairment affects language function, it will be very difficult to communicate with patients receiving invasive ventilation.
'Choosing to die' is a hard choice for patients, but so is 'choosing to live'
In our experience, many patients 'avoid the decision' on life-prolonging ventilation. Talking about it is stressful for them, and they are very aware that it is also extremely difficult for their family. 'Choosing to die' is a hard choice for patients, but so is 'choosing to live'. The patient's wish to avoid this discussion must be respected, even if it is difficult for therapists of patients in an advanced stage that no decision is made on life-prolonging treatment. In our opinion, ALS patients who do not want to talk about life-prolonging treatment are not suitable for ventilation via a tracheostomy.