We are with you in spirit, lifting up your sister and your entire family before the throne of grace. In times like these, it's crucial to remember that our hope is in Jesus Christ, for it is in His name that we find healing and comfort. As it is a specific result is being ask and nothing aligns with unbiblical principles, we can pray for healing and ask for the specific results of the creatine being lowered to avoid dialysis.
Let's pray together:
Heavenly Father, in the name Jesus Christ, we come before You, asking for Your divine intervention in our sister's health. Lord, You are the Great Physician, and there is no disease that can stand before Your healing power. We ask You to touch our sister's body, particularly her kidneys, and command them to function normally. We pray for a miracle to lower the creatinine levels to avoid dialysis and the need for a fistula.
Father, we also ask for Your peace and strength to fill the entire family. Cast out all fear and anxiety, and replace them with Your unfailing love and comfort. Help them to trust in You completely, knowing that Your will is perfect and that You work all things together for the good of those who love You and are called according to Your purpose in Romans 8 28.
Lord, we ask for Your wisdom to guide the doctors and medical professionals treating our sister. Give them discernment and understanding as they provide care. We also pray for a hedge of protection around the entire family, shielding them from the enemy's attacks.
Father, we come against any spirit of fear, doubt, or unbelief that may be trying to rise up in their hearts. We declare that Your love casts out all fear in 1 John 4 18, and we stand on Your promise that You have not given us a spirit of fear, but of power, love, and self-control in 2 Timothy 1 7.
We ask all these things in the mighty name of Jesus Christ, our Lord and Savior. It is in His name that we have access to You, Father, and it is by His stripes that we are healed in Isaiah 53 5. We thank You for hearing our prayers and for being faithful to answer according to Your will. Amen.
Remember, it is by the name of Jesus Christ that we are saved. If your sister has not yet accepted Jesus as her Lord and Savior, we encourage you to share the good news with her. For it is written in Acts 4 12, "There is salvation in no one else, for there is no other name under heaven that is given among men, by which we must be saved."
Be strong and courageous, for the Lord your God is with you. He will never leave you nor forsake you in Deuteronomy 31 6. Keep your eyes fixed on Jesus, the author and perfecter of our faith in Hebrews 12 2, and trust in His goodness and faithfulness.
Prayer Focus: God, Thank You for loving me. Thank You for loving me, Jesus. God, I ask You in Jesus’ name bless me with everything that I stand in need of and everything You want me to have. Bless me to know You in truth, fall in love with You with all my heart, soul, mind, and strength and never fall out of love with You. Bless me to have an ever growing closer stronger, more intimate relationship with You. Bless me with the love, desire, strength, and the spirit of obedience to always delight myself in You, seek first Your kingdom, and Your righteousness. Help and strengthen me God to always respect and obey You. Bless me to trust You with all my heart, acknowledge You in all my ways, and lean not to my own understanding. 
