She had an operation and offered several prayers without having purified herself and without facing the qiblah
Question

                I had an operation after Maghrib and the effects of the anaesthetic lasted until Fajr the next day, i.e., I did not pray ‘Isha’ or Fajr. When I woke up from the anaesthetic, I prayed them without doing wudoo’ or even facing the qiblah, and I did not wear my head cover, because of my medical state, whereby I could not even turn over onto my other side. I was in this state until ‘Isha’ and I offered all the prayers in this manner. I would like to ask your advice: should I repeat these prayers or not? If the answer is yes, then what is the manner in which I should repeat them? Should I pray Fajr today and then pray Fajr again with the intention of making up the Fajr that I did not pray, and so on with the rest of the prayers, or what?.
Praise be to Allah.Firstly: 
When a sick 
    person wakes up from the anaesthetic, he has to make up the prayers that he 
    missed for that reason.
 Secondly: 
If a sick 
    person is unable to do wudoo’ and there is no one who can help him do 
    wudoo’, then he should do tayammum, even if he strikes his hands against a 
    wall or piece of furniture if there is dust on it, or he may bring some dirt 
    with him with which to do tayammum. If he is unable to do tayammum then he 
    may pray as he is. 
The same 
    applies with regard to facing the qiblah and covering the ‘awrah (wearing a 
    khimaar or head cover). If he is able to do any of that then he must do it, 
    but whatever he is unable to do is waived for him and he is not accountable 
    for it, because Allaah says (interpretation of the meaning): 
“Allaah 
    burdens not a person beyond his scope”

    [al-Baqarah 2:286]
Shaykh Ibn 
    ‘Uthaymeen (may Allaah have mercy on him) was asked: If a sick person cannot 
    find any dust, can he do tayammum using the walls or furniture, or not? 
He replied: 
    The walls come under the heading of clean earth, so if the walls are built 
    of clean earth, whether that is stones or clay bricks, then it is 
    permissible to do tayammum using them. But if the walls are covered with 
    wood or paint, if there is dust on it they may be used for tayammum and 
    there is nothing wrong with that because then he will be like one who does 
    tayammum on the earth, because dust comes from the earth, but if there is no 
    dust on it, then it does not come under the heading of clean earth, so he 
    should not use it for tayammum. 
With regard 
    to furniture we say: if there is dust on it he may use it for tayammum 
    otherwise he should not do tayammum on it, because it does not come under 
    the heading of clean earth. End quote from Fataawa al-Tahaarah (p. 
    240). 
The Standing 
    Committee for Issuing Fatwas was asked: I am bedridden and cannot move. How 
    can I purify myself in order to pray, and how can I pray? 
They 
    replied: Firstly: with regard to purification, the Muslim must purify 
    himself with water; if he is unable to use it because he is sick or for some 
    other reason, he may do tayammum with clean earth. If he is unable to do 
    that then the requirement to purify himself is waived and he should pray as 
    he is. Allaah says (interpretation of the meaning): 
“So keep 
    your duty to Allaah and fear Him as much as you can”

    [al-Taghaabun 64:16]
“and 
    [Allaah] has not laid upon you in religion any hardship”
[al-Hajj 
    22:78]
With regard 
    to urine and faeces, it is sufficient to clean it with stones (istijmaar) or 
    clean tissues with which the place where it comes out should be wiped three 
    times or more, until the place is clean. 
Secondly: 
With regard 
    to prayer, the sick person has to pray standing. If he cannot pray standing, 
    then sitting, and if he cannot sit, then on his side, because of the report 
    from ‘Imraan ibn Husayn, that the Prophet  (peace and blessings of 
    Allaah be upon him) said: “Pray standing, and if you cannot then sitting, 
    and if you cannot then on your side.” And Allaah says (interpretation of the 
    meaning): “So keep your duty to Allaah and fear Him as much as you 
    can”[al-Taghaabun 64:16]. End quote from al-Fataawa al-Muta’alliqah 
    bi’l-Tibb wa Ahkaam al-Marda, p. 78. 
Thirdly: 
If you 
    prayed as you described, without wudoo’ or tayammum, and without facing the 
    qiblah, and without wearing the khimaar because you were unable to do that, 
    and because there was no one to help you do wudoo’ or tayammum or to make 
    you face the qiblah, then your prayer is valid and you do not have to repeat 
    it. 
If it was 
    possible for you to do tayammum or wudoo’ with the help of another person, 
    but you failed to ask for help, then you have fallen short in seeking to 
    purify yourself, which is a condition of the prayer being valid, and you 
    have to repeat the prayers that you offered when you were not pure and did 
    not face the qiblah. 
Fourthly: 
The prayers 
    must be repeated immediately, if you are able, as soon as you come to know 
    that repeating them is obligatory. You should start with the prayer that you 
    missed, and offer them in order with the proper intention, and pray ‘Isha’ 
    for the first day, then Fajr, Zuhr, ‘Asr, Maghrib and ‘Isha’ for the second 
    day.  
What is 
    meant is that you should do that in one go, if possible, whether that is in 
    the morning or at noontime or at whatever time of day you come to know of 
    the ruling that they must be repeated. It is not permissible to delay the 
    prayers and make them up at separate times, as some people think. 
If making 
    them up in one go is too difficult for you, then you should pray whatever 
    you can, then rest, then finish making up whatever prayers you owe. 
Shaykh Ibn 
    ‘Uthaymeen (may Allaah have mercy on him) was asked about a sick person who 
    had surgery and missed a number of obligatory prayers. Should he pray them 
    all together after he recovers, or should he pray each one at its proper 
    time, such as praying Zuhr with Zuhr and so on? 
He replied: 
He should 
    offer them all together in one go, because when the Prophet  (peace and 
    blessings of Allaah be upon him) missed ‘Asr during the battle of 
    al-Khandaq, he prayed it before praying Maghrib. If a person misses some 
    obligatory prayers he must pray them all together and not delay them. End 
    quote from Majmoo’ Fataawa Ibn ‘Uthaymeen (12/222). 
And Allaah 
    knows best.